110-673: Nanisivik Mine was a zinc - lead mine in the company town of Nanisivik , Nunavut , 750 km (470 mi) north of the Arctic Circle on Baffin Island . It was Canada's first mine in the Arctic . The mine first opened on 15 October 1976 and permanently closed in September 2002 due to low metal prices and declining resources. Mine reclamation began in April 2003. It was one of the most northerly mines in
220-409: A condenser . Some alchemists called this zinc oxide lana philosophica , Latin for "philosopher's wool", because it collected in wooly tufts, whereas others thought it looked like white snow and named it nix album . The name of the metal was probably first documented by Paracelsus , a Swiss-born German alchemist, who referred to the metal as "zincum" or "zinken" in his book Liber Mineralium II , in
330-428: A gamma ray . Zn has three excited metastable states and Zn has two. The isotopes Zn , Zn , Zn and Zn each have only one excited metastable state. The most common decay mode of a radioisotope of zinc with a mass number lower than 66 is electron capture . The decay product resulting from electron capture is an isotope of copper. The most common decay mode of
440-514: A by-product of smelting sulfide ores. Zinc in such remnants in smelting ovens was usually discarded as it was thought to be worthless. The manufacture of brass was known to the Romans by about 30 BC. They made brass by heating powdered calamine (zinc silicate or carbonate), charcoal and copper together in a crucible. The resulting calamine brass was then either cast or hammered into shape for use in weaponry. Some coins struck by Romans in
550-400: A half-life of 243.66 days, is the least active radioisotope, followed by Zn with a half-life of 46.5 hours. Zinc has 10 nuclear isomers , of which Zn has the longest half-life, 13.76 h. The superscript m indicates a metastable isotope. The nucleus of a metastable isotope is in an excited state and will return to the ground state by emitting a photon in the form of
660-634: A huge campaign against the Emirate of Crete in 960 to 961. Meanwhile, the Bulgarian Empire threatened Byzantine control of Northern Greece and the Aegean coast to the south. Under Presian and his successor Boris I , the Bulgarian Empire managed to obtain a small portion of the northern Aegean coast. Simeon I of Bulgaria led Bulgaria to its greatest territorial expansion, and managed to conqueror much of
770-643: A large body of water. This is most predominant in the west and east coasts of the Aegean, and within the Aegean islands. In the north of the Aegean Sea, the climate is instead classified as Cold semi-arid (BSk) , which feature cooler summers than Hot-summer Mediterranean climates. The Etesian winds are a dominant weather influence in the Aegean Basin. The below table lists climate conditions of some major Aegean cities: Numerous Greek and Turkish settlements are located along their mainland coast, as well as on towns on
880-716: A maximum depth of 3,544 m (11,627 ft) to the east of Crete . The Thracian Sea and the Sea of Crete are main subdivisions of the Aegean Sea. The Aegean Islands can be divided into several island groups, including the Dodecanese , the Cyclades , the Sporades , the Saronic islands and the North Aegean Islands , as well as Crete and its surrounding islands. The Dodecanese, located to
990-506: A metal which, when oxidized, produces pushpanjan , thought to be zinc oxide. Zinc mines at Zawar, near Udaipur in India, have been active since the Mauryan period ( c. 322 and 187 BCE). The smelting of metallic zinc here, however, appears to have begun around the 12th century AD. One estimate is that this location produced an estimated million tonnes of metallic zinc and zinc oxide from
1100-417: A metal–carbon sigma bond . Cobalticyanide paper (Rinnmann's test for Zn) can be used as a chemical indicator for zinc. 4 g of K 3 Co(CN) 6 and 1 g of KClO 3 is dissolved on 100 ml of water. Paper is dipped in the solution and dried at 100 °C. One drop of the sample is dropped onto the dry paper and heated. A green disc indicates the presence of zinc. Various isolated examples of
1210-511: A point west of Karpathos . The Aegean Islands are found within its waters, with the following islands delimiting the sea on the south, generally from west to east: Kythera , Antikythera , Crete , Kasos , Karpathos and Rhodes . The Anatolian peninsula marks the eastern boundary of the sea, while the Greek mainland marks the west. Several seas are contained within the Aegean Sea; the Thracian Sea
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#17328485236861320-505: A process in 1758 for calcining zinc sulfide into an oxide usable in the retort process. Prior to this, only calamine could be used to produce zinc. In 1798, Johann Christian Ruberg improved on the smelting process by building the first horizontal retort smelter. Jean-Jacques Daniel Dony built a different kind of horizontal zinc smelter in Belgium that processed even more zinc. Italian doctor Luigi Galvani discovered in 1780 that connecting
1430-582: A quantity of what he called "calay" (from the Malay or Hindi word for tin) originating from Malabar off a cargo ship captured from the Portuguese in the year 1596. Libavius described the properties of the sample, which may have been zinc. Zinc was regularly imported to Europe from the Orient in the 17th and early 18th centuries, but was at times very expensive. Metallic zinc was isolated in India by 1300 AD. Before it
1540-401: A radioisotope of zinc with mass number higher than 66 is beta decay (β ), which produces an isotope of gallium . Zinc has an electron configuration of [Ar]3d 4s and is a member of the group 12 of the periodic table . It is a moderately reactive metal and strong reducing agent . The surface of the pure metal tarnishes quickly, eventually forming a protective passivating layer of
1650-495: A zinc atom in the reactive center are widespread in biochemistry, such as alcohol dehydrogenase in humans. Consumption of excess zinc may cause ataxia , lethargy , and copper deficiency . In marine biomes, notably within polar regions, a deficit of zinc can compromise the vitality of primary algal communities, potentially destabilizing the intricate marine trophic structures and consequently impacting biodiversity. Brass , an alloy of copper and zinc in various proportions,
1760-403: Is a chalcophile , meaning the element is more likely to be found in minerals together with sulfur and other heavy chalcogens , rather than with the light chalcogen oxygen or with non-chalcogen electronegative elements such as the halogens . Sulfides formed as the crust solidified under the reducing conditions of the early Earth's atmosphere. Sphalerite , which is a form of zinc sulfide,
1870-472: Is a chemical element with the symbol Zn and atomic number 30. It is a slightly brittle metal at room temperature and has a shiny-greyish appearance when oxidation is removed. It is the first element in group 12 (IIB) of the periodic table . In some respects, zinc is chemically similar to magnesium : both elements exhibit only one normal oxidation state (+2), and the Zn and Mg ions are of similar size. Zinc
1980-479: Is a considerable difference between fish catches between the pelagic and demersal zones; with respect to pelagic fisheries, the catches from the northern, central and southern Aegean area groupings are dominated, respectively, by anchovy , horse mackerels , and boops . For demersal fisheries, the catches from the northern and southern Aegean area groupings are dominated by grey mullets and pickerel ( Spicara smaris ) respectively. The industry has been impacted by
2090-542: Is a section of the Aegean located to the north, the Icarian Sea to the east, the Myrtoan Sea to the west, while the Sea of Crete is the southern section. The Greek regions that border the sea, in alphabetical order, are Attica , Central Greece , Central Macedonia , Crete, Eastern Macedonia and Thrace , North Aegean , Peloponnese , South Aegean , and Thessaly . The traditional Greek region of Macedonia also borders
2200-534: Is being smelted. In Britain, John Lane is said to have carried out experiments to smelt zinc, probably at Landore , prior to his bankruptcy in 1726. In 1738 in Great Britain, William Champion patented a process to extract zinc from calamine in a vertical retort -style smelter. His technique resembled that used at Zawar zinc mines in Rajasthan , but no evidence suggests he visited the Orient. Champion's process
2310-527: Is hard and brittle at most temperatures but becomes malleable between 100 and 150 °C. Above 210 °C, the metal becomes brittle again and can be pulverized by beating. Zinc is a fair conductor of electricity . For a metal, zinc has relatively low melting (419.5 °C) and boiling point (907 °C). The melting point is the lowest of all the d-block metals aside from mercury and cadmium ; for this reason among others, zinc, cadmium, and mercury are often not considered to be transition metals like
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#17328485236862420-464: Is implicated by the formation of a yellow diamagnetic glass by dissolving metallic zinc in molten ZnCl 2 . The [Zn 2 ] core would be analogous to the [Hg 2 ] cation present in mercury (I) compounds. The diamagnetic nature of the ion confirms its dimeric structure. The first zinc(I) compound containing the Zn–Zn bond, (η -C 5 Me 5 ) 2 Zn 2 . Binary compounds of zinc are known for most of
2530-410: Is known as Special High Grade, often abbreviated SHG , and is 99.995% pure. Worldwide, 95% of new zinc is mined from sulfidic ore deposits, in which sphalerite (ZnS) is nearly always mixed with the sulfides of copper, lead and iron. Zinc mines are scattered throughout the world, with the main areas being China, Australia, and Peru. China produced 38% of the global zinc output in 2014. Zinc metal
2640-545: Is necessary for prenatal and postnatal development. It is the second most abundant trace metal in humans after iron and it is the only metal which appears in all enzyme classes . Zinc is also an essential nutrient element for coral growth as it is an important cofactor for many enzymes. Zinc deficiency affects about two billion people in the developing world and is associated with many diseases. In children, deficiency causes growth retardation, delayed sexual maturation, infection susceptibility, and diarrhea . Enzymes with
2750-511: Is necessary for the leaching process. If deposits of zinc carbonate , zinc silicate , or zinc-spinel (like the Skorpion Deposit in Namibia ) are used for zinc production, the roasting can be omitted. For further processing two basic methods are used: pyrometallurgy or electrowinning . Pyrometallurgy reduces zinc oxide with carbon or carbon monoxide at 950 °C (1,740 °F) into
2860-437: Is produced using extractive metallurgy . The ore is finely ground, then put through froth flotation to separate minerals from gangue (on the property of hydrophobicity ), to get a zinc sulfide ore concentrate consisting of about 50% zinc, 32% sulfur, 13% iron, and 5% SiO 2 . Roasting converts the zinc sulfide concentrate to zinc oxide: The sulfur dioxide is used for the production of sulfuric acid, which
2970-626: Is the 24th most abundant element in Earth's crust and has five stable isotopes . The most common zinc ore is sphalerite (zinc blende), a zinc sulfide mineral. The largest workable lodes are in Australia, Asia, and the United States. Zinc is refined by froth flotation of the ore, roasting , and final extraction using electricity ( electrowinning ). Zinc is an essential trace element for humans, animals, plants and for microorganisms and
3080-578: Is the chief port in Greece, the largest passenger port in Europe and the third largest in the world, servicing about 20 million passengers annually. With a throughput of 1.4 million TEUs , Piraeus is placed among the top ten ports in container traffic in Europe and the top container port in the Eastern Mediterranean . Piraeus is also the commercial hub of Greek shipping . Piraeus bi-annually acts as
3190-532: Is the most heavily mined zinc-containing ore because its concentrate contains 60–62% zinc. Other source minerals for zinc include smithsonite (zinc carbonate ), hemimorphite (zinc silicate ), wurtzite (another zinc sulfide), and sometimes hydrozincite (basic zinc carbonate ). With the exception of wurtzite, all these other minerals were formed by weathering of the primordial zinc sulfides. Identified world zinc resources total about 1.9–2.8 billion tonnes . Large deposits are in Australia, Canada and
3300-832: The Chalkidiki Peninsula including the Cassandra and the Singitic Gulfs , northward the Strymonian Gulf and the Gulf of Kavala and the rest are in Turkey ; Saros Gulf , Edremit Gulf, Dikili Gulf , Gulf of Çandarlı , Gulf of İzmir , Gulf of Kuşadası , Gulf of Gökova , Güllük Gulf. The Aegean Sea is connected to the Sea of Marmara by the Dardanelles , also known from Classical Antiquity as
3410-620: The Great Recession . Overfishing and habitat destruction is also a concern, threatening grouper, and seabream populations, resulting in perhaps a 50% decline of fish catch. To address these concerns, Greek fishermen have been offered a compensation by the government. Although some species are defined as protected or threatened under EU legislation, several illegal species such as the molluscs Pinna nobilis , Charonia tritonis and Lithophaga lithophaga , can be bought in restaurants and fish markets around Greece. The Aegean islands within
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3520-522: The High and Late Middle Ages , popularized the name Archipelago ( Greek : αρχιπέλαγος , meaning "main sea" or "chief sea"), a name that held on in many European countries until the early modern period . In South Slavic languages , the Aegean is called White Sea ( Bulgarian : Бяло море , romanized : Byalo more ; Macedonian : Бело море , romanized : Belo more ; Serbo-Croatian : Belo more / Бело море ). The Turkish name for
3630-753: The Mediterranean Sea between Europe and Asia . It is located between the Balkans and Anatolia , and covers an area of some 215,000 km (83,000 sq mi). In the north, the Aegean is connected to the Marmara Sea , which in turn connects to the Black Sea , by the straits of the Dardanelles and the Bosphorus , respectively. The Aegean Islands are located within the sea and some bound it on its southern periphery, including Crete and Rhodes . The sea reaches
3740-948: The Nea Moni of Chios , the island of Delos , and the Medieval City of Rhodes. Greece is one of the most visited countries in Europe and the world with over 33 million visitors in 2018, and the tourism industry around a quarter of Greece's Gross Domestic Product. The islands of Santorini, Crete, Lesbos, Delos, and Mykonos are common tourist destinations. An estimated 2 million tourists visit Santorini annually. However, concerns relating to overtourism have arisen in recent years, such as issues of inadequate infrastructure and overcrowding. Alongside Greece, Turkey has also been successful in developing resort areas and attracting large number of tourists, contributing to tourism in Turkey . The phrase " Blue Cruise " refers to recreational voyages along
3850-603: The Punic Wars . During Roman rule, the land around the Aegean Sea fell under the provinces of Achaea , Macedonia , Thracia , Asia and Creta et Cyrenaica (island of Crete) The fall of the Western Roman Empire allowed its successor state, the Byzantine Empire , to continue Roman control over the Aegean Sea. However, their territory would later be threatened by the early Muslim conquests initiated by Muhammad in
3960-691: The Recapture of Constantinople from the Latins in 1261 and defeat Epirus. Byzantine successes were not to last; the Ottomans would conquer the area around the Aegean coast, but before their expansion the Byzantine Empire had already been weakened from internal conflict. By the late 14th century, the Byzantine Empire had lost all control of the coast of the Aegean Sea and could exercise power around their capital, Constantinople. The Ottoman Empire then gained control of all
4070-554: The Turkish provinces of Edirne , Çanakkale , Balıkesir , İzmir , Aydın and Muğla to the east of the sea. Various Turkish islands in the sea are Imbros , Tenedos , Cunda Island , and the Foça Islands . The Aegean Sea has been historically important, especially regarding the civilization of Ancient Greece , which inhabited the area around the coast of the Aegean and the Aegean islands. The Aegean islands facilitated contact between
4180-469: The metalloids and all the nonmetals except the noble gases . The oxide ZnO is a white powder that is nearly insoluble in neutral aqueous solutions, but is amphoteric , dissolving in both strong basic and acidic solutions. The other chalcogenides ( ZnS , ZnSe , and ZnTe ) have varied applications in electronics and optics. Pnictogenides ( Zn 3 N 2 , Zn 3 P 2 , Zn 3 As 2 and Zn 3 Sb 2 ),
4290-518: The spinal cord of a freshly dissected frog to an iron rail attached by a brass hook caused the frog's leg to twitch. He incorrectly thought he had discovered an ability of nerves and muscles to create electricity and called the effect " animal electricity ". The galvanic cell and the process of galvanization were both named for Luigi Galvani, and his discoveries paved the way for electrical batteries , galvanization, and cathodic protection . Galvani's friend, Alessandro Volta , continued researching
4400-403: The 12th to 16th centuries. Another estimate gives a total production of 60,000 tonnes of metallic zinc over this period. The Rasaratna Samuccaya , written in approximately the 13th century AD, mentions two types of zinc-containing ores: one used for metal extraction and another used for medicinal purposes. Zinc was distinctly recognized as a metal under the designation of Yasada or Jasada in
4510-610: The 16th century. The word is probably derived from the German zinke , and supposedly meant "tooth-like, pointed or jagged" (metallic zinc crystals have a needle-like appearance). Zink could also imply "tin-like" because of its relation to German zinn meaning tin. Yet another possibility is that the word is derived from the Persian word سنگ seng meaning stone. The metal was also called Indian tin , tutanego , calamine , and spinter . German metallurgist Andreas Libavius received
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4620-455: The 1970s. Issues include the delimitation of territorial waters , national airspace , exclusive economic zones , and flight information regions . The name Aegaeus , used by Late Latin authors, referred to Aegeus , who was said to have jumped into that sea to drown himself (rather than throw himself from the Athenian acropolis, as told by some Greek authors). He was the father of Theseus ,
4730-422: The 24th most abundant element. It also makes up 312 ppm of the solar system, where it is the 22nd most abundant element. Typical background concentrations of zinc do not exceed 1 μg/m in the atmosphere; 300 mg/kg in soil; 100 mg/kg in vegetation; 20 μg/L in freshwater and 5 μg/L in seawater. The element is normally found in association with other base metals such as copper and lead in ores . Zinc
4840-673: The 7th century. Although the Rashidun Caliphate did not manage to obtain land along the coast of the Aegean Sea, its conquest of the Eastern Anatolian peninsula as well as Egypt, the Levant, and North Africa left the Byzantine Empire weakened. The Umayyad Caliphate expanded the territorial gains of the Rashidun Caliphate, conquering much of North Africa, and threatened the Byzantine Empire's control of Western Anatolia, where it meets
4950-794: The Aegean Sea are significant tourist destinations. Tourism to the Aegean islands contributes a significant portion of tourism in Greece , especially since the second half of the 20th century. A total of five UNESCO World Heritage sites are located the Aegean Islands; these include the Monastery of Saint John the Theologian and the Cave of the Apocalypse on Patmos , the Pythagoreion and Heraion of Samos in Samos ,
5060-405: The Aegean Sea. During the 820s, Crete was conquered by a group of Berbers Andalusians exiles led by Abu Hafs Umar al-Iqritishi , and it became an independent Islamic state. The Byzantine Empire launched a campaign that took most of the island back in 842 and 843 under Theoktistos , but the re-conquest was not completed and was soon reversed. Later attempts by the Byzantine Empire to recover
5170-894: The Aegean beginning at the South and moving clockwise include on Crete, the Mirabello , Almyros , Souda and Chania bays or gulfs, on the mainland the Myrtoan Sea to the west with the Argolic Gulf , the Saronic Gulf northwestward, the Petalies Gulf which connects with the South Euboic Sea , the Pagasetic Gulf which connects with the North Euboic Sea , the Thermian Gulf northwestward,
5280-400: The Aegean coast with the exception of Crete, which was a Venetian colony until 1669. The Greek War of Independence allowed a Greek state on the coast of the Aegean from 1829 onward. The Ottoman Empire held a presence over the sea for over 500 years until its dissolution following World War I , when it was replaced by modern Turkey. During the war, Greece gained control over the area around
5390-452: The Aegean islands. The largest cities are Athens and Thessaloniki in Greece and İzmir in Turkey. The most populated of the Aegean islands is Crete, followed by Euboea and Rhodes. Athens [REDACTED] İzmir Thessaloniki [REDACTED] Bodrum Greece has established several marine protected areas along its coasts. According to the Network of Managers of Marine Protected Areas in
5500-601: The Aegean, was essential for the Mycenaean economy. Their syllabic script , the Linear B , offers the first written records of the Greek language and their religion already included several deities that can also be found in the Olympic Pantheon . Mycenaean Greece was dominated by a warrior elite society and consisted of a network of palace -centered states that developed rigid hierarchical, political, social and economic systems. At
5610-710: The Athenian fleet gained a decisive victory over the Persian fleet of the Xerxes II of Persia at the Battle of Salamis . Thus ending any further attempt of western expansion by the Achaemenid Empire . The Aegean Sea would later come to be under the control, albeit briefly, of the Kingdom of Macedonia . Philip II and his son Alexander the Great led a series of conquests that led not only to
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#17328485236865720-461: The Christian era are made of what is probably calamine brass. The oldest known pills were made of the zinc carbonates hydrozincite and smithsonite. The pills were used for sore eyes and were found aboard the Roman ship Relitto del Pozzino , wrecked in 140 BC. The Berne zinc tablet is a votive plaque dating to Roman Gaul made of an alloy that is mostly zinc. The Charaka Samhita , thought to have been written between 300 and 500 AD, mentions
5830-401: The Greek Dark Ages in the 8th century BC. Greece became divided into small self-governing communities, and adopted the Phoenician alphabet , modifying it to create the Greek alphabet . By the 6th century BC several cities had emerged as dominant in Greek affairs: Athens, Sparta, Corinth , and Thebes , of which Athens, Sparta, and Corinth were closest to the Aegean Sea. Each of them had brought
5940-486: The Hellespont. The Dardanelles are located to the northeast of the sea. It ultimately connects with the Black Sea through the Bosporus strait, upon which lies the city of Istanbul . The Dardanelles and the Bosporus are known as the Turkish Straits . According to the International Hydrographic Organization , the limits of the Aegean Sea as follows: Aegean surface water circulates in a counterclockwise gyre , with hypersaline Mediterranean water moving northward along
6050-475: The Mediterranean ( MedPAN ), four Greek MPAs are participating in the Network. These include Alonnisos Marine Park , while the Missolonghi–Aitoliko Lagoons and the island of Zakynthos are not on the Aegean. The current coastline dates back to about 4000 BC. Before that time, at the peak of the last ice age (about 18,000 years ago) sea levels everywhere were 130 metres (430 ft) lower, and there were large well-watered coastal plains instead of much of
6160-428: The United States, with the largest reserves in Iran . The most recent estimate of reserve base for zinc (meets specified minimum physical criteria related to current mining and production practices) was made in 2009 and calculated to be roughly 480 Mt. Zinc reserves, on the other hand, are geologically identified ore bodies whose suitability for recovery is economically based (location, grade, quality, and quantity) at
6270-413: The area around the Aegean Sea was fragmented into multiple entities, including the Latin Empire , the Kingdom of Thessalonica , the Empire of Nicaea , the Principality of Achaea , and the Duchy of Athens . The Venetians created the maritime state of the Duchy of the Archipelago , which included all the Cyclades except Mykonos and Tinos . The Empire of Nicaea, a Byzantine rump state, managed to affect
6380-419: The basic zinc carbonate , Zn 5 (OH) 6 (CO 3 ) 2 , by reaction with atmospheric carbon dioxide . Zinc burns in air with a bright bluish-green flame, giving off fumes of zinc oxide . Zinc reacts readily with acids , alkalis and other non-metals. Extremely pure zinc reacts only slowly at room temperature with acids. Strong acids, such as hydrochloric or sulfuric acid , can remove
6490-420: The chromate ZnCrO 4 (one of the few colored zinc compounds) are a few examples of other common inorganic compounds of zinc. Organozinc compounds are those that contain zinc– carbon covalent bonds. Diethylzinc ( (C 2 H 5 ) 2 Zn ) is a reagent in synthetic chemistry. It was first reported in 1848 from the reaction of zinc and ethyl iodide , and was the first compound known to contain
6600-412: The climate of Greece and Western Turkey, which is to say, predominantly Mediterranean . According to the Köppen climate classification , most of the Aegean is classified as Hot-summer Mediterranean ( Csa ), with hotter and drier summers along with milder and wetter winters. However, high temperatures during summers are generally not quite as high as those in arid or semiarid climates due to the presence of
6710-427: The east coast of Greece. The physical oceanography of the Aegean Sea is controlled mainly by the regional climate, the fresh water discharge from major rivers draining southeastern Europe, and the seasonal variations in the Black Sea surface water outflow through the Dardanelles Strait . Analysis of the Aegean during 1991 and 1992 revealed three distinct water masses: The climate of the Aegean Sea largely reflects
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#17328485236866820-409: The effect and invented the Voltaic pile in 1800. Volta's pile consisted of a stack of simplified galvanic cells , each being one plate of copper and one of zinc connected by an electrolyte . By stacking these units in series, the Voltaic pile (or "battery") as a whole had a higher voltage, which could be used more easily than single cells. Electricity is produced because the Volta potential between
6930-418: The first advanced civilization in Europe, leaving behind massive building complexes, tools, stunning artwork, writing systems, and a massive network of trade. The Minoan period saw extensive trade between Crete, Aegean, and Mediterranean settlements, particularly the Near East. The most notable Minoan palace is that of Knossos , followed by that of Phaistos . The Mycenaean Greeks arose on the mainland, becoming
7040-401: The first advanced civilization in mainland Greece, which lasted from approximately 1600 to 1100 BC. It is believed that the site of Mycenae , which sits close to the Aegean coast, was the center of Mycenaean civilization. The Mycenaeans introduced several innovations in the fields of engineering, architecture and military infrastructure, while trade over vast areas of the Mediterranean, including
7150-426: The focus for a major shipping convention, known as Posidonia, which attracts maritime industry professionals from all over the world. Piraeus is currently Greece's third-busiest port in terms of tons of goods transported, behind Agioi Theodoroi and Thessaloniki . The central port serves ferry routes to almost every island in the eastern portion of Greece, the island of Crete, the Cyclades, the Dodecanese, and much of
7260-439: The formation of Zn 2 Cl 2 , a zinc compound with a +1 oxidation state. No compounds of zinc in positive oxidation states other than +1 or +2 are known. Calculations indicate that a zinc compound with the oxidation state of +4 is unlikely to exist. Zn(III) is predicted to exist in the presence of strongly electronegative trianions; however, there exists some doubt around this possibility. But in 2021 another compound
7370-411: The general term Aegean civilization . In ancient times, the sea was the birthplace of two ancient civilizations – the Minoans of Crete and the Mycenaeans of the Peloponnese . The Minoan civilization was a Bronze Age civilization on the island of Crete and other Aegean islands, flourishing from around 3000 to 1450 BC before a period of decline, finally ending at around 1100 BC. It represented
7480-458: The head of this society was the king, known as wanax . The civilization of Mycenaean Greeks perished with the collapse of Bronze Age culture in the eastern Mediterranean, to be followed by the so-called Greek Dark Ages . It is undetermined what cause the collapse of the Mycenaeans. During the Greek Dark Ages, writing in the Linear B script ceased, vital trade links were lost, and towns and villages were abandoned. The Archaic period followed
7590-461: The hydroxide Zn(OH) 2 forms as a white precipitate . In stronger alkaline solutions, this hydroxide is dissolved to form zincates ( [Zn(OH) 4 ] ). The nitrate Zn(NO 3 ) 2 , chlorate Zn(ClO 3 ) 2 , sulfate ZnSO 4 , phosphate Zn 3 (PO 4 ) 2 , molybdate ZnMoO 4 , cyanide Zn(CN) 2 , arsenite Zn(AsO 2 ) 2 , arsenate Zn(AsO 4 ) 2 ·8H 2 O and
7700-411: The island were without success. For the approximately 135 years of its existence, the emirate of Crete was one of the major foes of Byzantium. Crete commanded the sea lanes of the Eastern Mediterranean and functioned as a forward base and haven for Muslim corsair fleets that ravaged the Byzantine-controlled shores of the Aegean Sea. Crete returned to Byzantine rule under Nikephoros II Phokas , who launched
7810-481: The islands in the Aegean have safe harbours and bays. In ancient times, navigation through the sea was easier than travelling across the rough terrain of the Greek mainland, and to some extent, the coastal areas of Anatolia. Many of the islands are volcanic , and marble and iron are mined on other islands. The larger islands have some fertile valleys and plains. Of the main islands in the Aegean Sea, two belong to Turkey – Bozcaada (Tenedos) and Gökçeada (Imbros);
7920-455: The medical Lexicon ascribed to the Hindu king Madanapala (of Taka dynasty) and written about the year 1374. Smelting and extraction of impure zinc by reducing calamine with wool and other organic substances was accomplished in the 13th century in India. The Chinese did not learn of the technique until the 17th century. Alchemists burned zinc metal in air and collected the resulting zinc oxide on
8030-399: The metal, which is distilled as zinc vapor to separate it from other metals, which are not volatile at those temperatures. The zinc vapor is collected in a condenser. The equations below describe this process: In electrowinning , zinc is leached from the ore concentrate by sulfuric acid and impurities are precipitated: Aegean Sea The Aegean Sea is an elongated embayment of
8140-577: The mythical king and founder-hero of Athens . Aegeus had told Theseus to put up white sails when returning if he was successful in killing the Minotaur . When Theseus returned, he forgot these instructions, and Aegeus thought his son had died, so he drowned himself in the sea. The sea was known in Latin as Mare Aegaeum while under the control of the Roman Empire . The Venetians , who ruled many Greek islands in
8250-423: The northern Aegean. When they were first occupied, the present-day islands including Milos with its important obsidian production were probably still connected to the mainland. The present coastal arrangement appeared around 9,000 years ago, with post-ice age sea levels continuing to rise for another 3,000 years after that. The subsequent Bronze Age civilizations of Greece and the Aegean Sea have given rise to
8360-676: The northern and the eastern Aegean Sea, while the western part of the port is used for cargo services. As of 2007, the Port of Thessaloniki was the second-largest container port in Greece after the port of Piraeus, making it one of the busiest ports in Greece. In 2007, the Port of Thessaloniki handled 14,373,245 tonnes of cargo and 222,824 TEU's . Paloukia, on the island of Salamis , is a major passenger port. Fish are Greece's second-largest agricultural export, and Greece has Europe's largest fishing fleet. Fish captured include sardines , mackerel , grouper , grey mullets , sea bass , and seabream . There
8470-476: The northern and western coasts of the Aegean. The Byzantines later regained control. The Second Bulgarian Empire achieved similar success along, again, the northern and western coasts, under Ivan Asen II of Bulgaria . The Seljuk Turks , under the Seljuk Empire , invaded the Byzantine Empire in 1068, from which they annexed almost all the territories of Anatolia, including the east coast of the Aegean Sea, during
8580-601: The northern coast of the Aegean. By the 1930s, Greece and Turkey had about resumed their present-day borders. In the Italo-Turkish War of 1912, Italy captured the Dodecanese islands, and had occupied them since, reneging on the 1919 Venizelos – Tittoni agreement to cede them to Greece. The Greco-Italian War took place from October 1940 to April 1941 as part of the Balkans Campaign of World War II . The Italian war aim
8690-420: The organic laboratory. Zinc is a bluish-white, lustrous, diamagnetic metal, though most common commercial grades of the metal have a dull finish. It is somewhat less dense than iron and has a hexagonal crystal structure , with a distorted form of hexagonal close packing , in which each atom has six nearest neighbors (at 265.9 pm) in its own plane and six others at a greater distance of 290.6 pm. The metal
8800-525: The passivating layer and the subsequent reaction with the acid releases hydrogen gas. The chemistry of zinc is dominated by the +2 oxidation state. When compounds in this oxidation state are formed, the outer shell s electrons are lost, yielding a bare zinc ion with the electronic configuration [Ar]3d . In aqueous solution an octahedral complex, [Zn(H 2 O) 6 ] is the predominant species. The volatilization of zinc in combination with zinc chloride at temperatures above 285 °C indicates
8910-643: The people of the area and between Europe and Asia. Along with the Greeks, Thracians lived along the northern coasts. The Romans conquered the area under the Roman Empire, and later the Byzantine Empire held it against advances by the First Bulgarian Empire . The Fourth Crusade weakened Byzantine control of the area, and it was eventually conquered by the Ottoman Empire , with the exception of Crete, which
9020-406: The peroxide ( ZnO 2 ), the hydride ( ZnH 2 ), and the carbide ( ZnC 2 ) are also known. Of the four halides , ZnF 2 has the most ionic character, while the others ( ZnCl 2 , ZnBr 2 , and ZnI 2 ) have relatively low melting points and are considered to have more covalent character. In weak basic solutions containing Zn ions,
9130-630: The reign of Alp Arslan , the second Sultan of the Seljuk Empire. After the death of his successor, Malik Shah I , the empire was divided, and Malik Shah was succeeded in Anatolia by Kilij Arslan I , who founded the Sultanate of Rum . The Byzantines yet again recaptured the eastern coast of the Aegean. After Constantinople was occupied by Western European and Venetian forces during the Fourth Crusade ,
9240-399: The remainder, have been found that are 2,500 years old. A possibly prehistoric statuette containing 87.5% zinc was found in a Dacian archaeological site. Strabo writing in the 1st century BC (but quoting a now lost work of the 4th century BC historian Theopompus ) mentions "drops of false silver" which when mixed with copper make brass. This may refer to small quantities of zinc that is
9350-541: The reserve lifetime for zinc has remained unchanged. About 346 million tonnes have been extracted throughout history to 2002, and scholars have estimated that about 109–305 million tonnes are in use. Five stable isotopes of zinc occur in nature, with Zn being the most abundant isotope (49.17% natural abundance ). The other isotopes found in nature are Zn (27.73%), Zn (4.04%), Zn (18.45%), and Zn (0.61%). Several dozen radioisotopes have been characterized. Zn , which has
9460-533: The rest belong to Greece. Between the two countries, there are political disputes over several aspects of political control over the Aegean space, including the size of territorial waters, air control and the delimitation of economic rights to the continental shelf . These issues are known as the Aegean dispute . Multiple ports are located along the Greek and Turkish coasts of the Aegean Sea. The port of Piraeus in Athens
9570-497: The rest of the d-block metals. Many alloys contain zinc, including brass. Other metals long known to form binary alloys with zinc are aluminium , antimony , bismuth , gold , iron, lead , mercury, silver , tin , magnesium , cobalt , nickel , tellurium , and sodium . Although neither zinc nor zirconium is ferromagnetic , their alloy, ZrZn 2 , exhibits ferromagnetism below 35 K . Zinc makes up about 75 ppm (0.0075%) of Earth's crust , making it
9680-443: The richly colored sediments in the region of the islands of Santorini and Milos , in the south Aegean. Notable cities on the Aegean coastline include Athens , Thessaloniki , Volos , Kavala , and Heraklion in Greece, and İzmir and Bodrum in Turkey. Several issues concerning sovereignty within the Aegean Sea are disputed between Greece and Turkey. The Aegean dispute has had a large effect on Greece-Turkey relations since
9790-529: The same crystal structure , and in other circumstances where ionic radius is a determining factor, the chemistry of zinc has much in common with that of magnesium. In other respects, there is little similarity with the late first-row transition metals. Zinc tends to form bonds with a greater degree of covalency and much more stable complexes with N - and S - donors. Complexes of zinc are mostly 4- or 6- coordinate , although 5-coordinate complexes are known. Zinc(I) compounds are very rare. The [Zn 2 ] ion
9900-435: The sea is Ege Denizi , which is derived from the Greek name, and Adalar Denizi meaning "the sea of islands". The Aegean Sea is an elongated embayment of the Mediterranean Sea and covers about 214,000 square kilometres (83,000 sq mi) in area, measuring about 670 kilometres (420 mi) longitudinally and 390 kilometres (240 mi) latitudinal. The sea's maximum depth is 2,639 metres (8,658 ft), located at
10010-573: The sea's eastern coast. Greece had entered the Hellenistic period . The Macedonian Wars were a series of conflicts fought by the Roman Republic and its Greek allies in the eastern Mediterranean against several different major Greek kingdoms. They resulted in Roman control or influence over the eastern Mediterranean basin, including the Aegean, in addition to their hegemony in the western Mediterranean after
10120-549: The sea, to the north. The Aegean Islands, which almost all belong to Greece , can be divided into seven groups: Many of the Aegean islands or island chains, are geographical extensions of the mountains on the mainland. One chain extends across the sea to Chios, another extends across Euboea to Samos, and a third extends across the Peloponnese and Crete to Rhodes, dividing the Aegean from the Mediterranean. The bays and gulfs of
10230-581: The second known zinc-containing enzyme in 1955. Zinc is the fourth most common metal in use, trailing only iron , aluminium , and copper with an annual production of about 13 million tonnes. The world's largest zinc producer is Nyrstar , a merger of the Australian OZ Minerals and the Belgian Umicore . About 70% of the world's zinc originates from mining, while the remaining 30% comes from recycling secondary zinc. Commercially pure zinc
10340-583: The southeast, includes the islands of Rhodes, Kos , and Patmos ; the islands of Delos and Naxos are within the Cyclades to the south of the sea. Lesbos is part of the North Aegean Islands. Euboea , the second-largest island in Greece, is located in the Aegean, despite being administered as part of Central Greece . Nine out of twelve of the Administrative regions of Greece border the sea, along with
10450-477: The surrounding rural areas and smaller towns under their control, and Athens and Corinth had become major maritime and mercantile powers as well. In the 8th and 7th centuries BC many Greeks migrated to form colonies in Magna Graecia ( Southern Italy and Sicily ), Asia Minor and further afield. The Aegean Sea was the setting for one of the most pivotal naval engagements in history, when, on 20 September 480 B.C.,
10560-520: The time of determination. Since exploration and mine development is an ongoing process, the amount of zinc reserves is not a fixed number and sustainability of zinc ore supplies cannot be judged by simply extrapolating the combined mine life of today's zinc mines. This concept is well supported by data from the United States Geological Survey (USGS), which illustrates that although refined zinc production increased 80% between 1990 and 2010,
10670-423: The two metal plates makes electrons flow from the zinc to the copper and corrode the zinc. The non-magnetic character of zinc and its lack of color in solution delayed discovery of its importance to biochemistry and nutrition. This changed in 1940 when carbonic anhydrase , an enzyme that scrubs carbon dioxide from blood, was shown to have zinc in its active site . The digestive enzyme carboxypeptidase became
10780-484: The unification of the Greek mainland and the control of the Aegean Sea under his rule, but also the destruction of the Achaemenid Empire . After Alexander the Great's death, his empire was divided among his generals. Cassander became king of the Hellenistic kingdom of Macedon, which held territory along the western coast of the Aegean, roughly corresponding to modern-day Greece. The Kingdom of Lysimachus had control over
10890-498: The use of impure zinc in ancient times have been discovered. Zinc ores were used to make the zinc–copper alloy brass thousands of years prior to the discovery of zinc as a separate element. Judean brass from the 14th to 10th centuries BC contains 23% zinc. Knowledge of how to produce brass spread to Ancient Greece by the 7th century BC, but few varieties were made. Ornaments made of alloys containing 80–90% zinc, with lead, iron, antimony , and other metals making up
11000-521: The west coast of Turkey, before being displaced by less dense Black Sea outflow. The dense Mediterranean water sinks below the Black Sea inflow to a depth of 23–30 metres (75–98 ft), then flows through the Dardanelles Strait and into the Sea of Marmara at velocities of 5–15 cm/s (2–6 in/s). The Black Sea outflow moves westward along the northern Aegean Sea, then flows southwards along
11110-464: The world. The mine was served by a port and dock located about 2.7 km (1.7 mi) north. It was used for shipping concentrate from the site, and receiving supplies. It is currently used by the Canadian Coast Guard for training and is intended to become Nanisivik Naval Facility . The mine also had its own airport ( Nanisivik Airport ) located about 7 km (4.3 mi) southwest and
11220-456: Was a Venetian colony until 1669. The Greek War of Independence allowed a Greek state on the coast of the Aegean from 1829 onwards. The Ottoman Empire held a presence over the sea for over 500 years until it was replaced by modern Turkey . The rocks making up the floor of the Aegean are mainly limestone, though often greatly altered by volcanic activity that has convulsed the region in relatively recent geologic times. Of particular interest are
11330-540: Was isolated in Europe, it was imported from India in about 1600 CE. Postlewayt 's Universal Dictionary , a contemporary source giving technological information in Europe, did not mention zinc before 1751 but the element was studied before then. Flemish metallurgist and alchemist P. M. de Respour reported that he had extracted metallic zinc from zinc oxide in 1668. By the start of the 18th century, Étienne François Geoffroy described how zinc oxide condenses as yellow crystals on bars of iron placed above zinc ore that
11440-472: Was known to the ancient Romans and Greeks. The mines of Rajasthan have given definite evidence of zinc production going back to the 6th century BC. The oldest evidence of pure zinc comes from Zawar, in Rajasthan, as early as the 9th century AD when a distillation process was employed to make pure zinc. Alchemists burned zinc in air to form what they called " philosopher's wool " or "white snow". The element
11550-786: Was probably named by the alchemist Paracelsus after the German word Zinke (prong, tooth). German chemist Andreas Sigismund Marggraf is credited with discovering pure metallic zinc in 1746. Work by Luigi Galvani and Alessandro Volta uncovered the electrochemical properties of zinc by 1800. Corrosion -resistant zinc plating of iron ( hot-dip galvanizing ) is the major application for zinc. Other applications are in electrical batteries , small non-structural castings, and alloys such as brass. A variety of zinc compounds are commonly used, such as zinc carbonate and zinc gluconate (as dietary supplements), zinc chloride (in deodorants), zinc pyrithione (anti- dandruff shampoos), zinc sulfide (in luminescent paints), and dimethylzinc or diethylzinc in
11660-421: Was reported with more evidence that had the oxidation state of +3 with the formula ZnBeB 11 (CN) 12 . Zinc chemistry is similar to the chemistry of the late first-row transition metals, nickel and copper, though it has a filled d-shell and compounds are diamagnetic and mostly colorless. The ionic radii of zinc and magnesium happen to be nearly identical. Because of this some of the equivalent salts have
11770-547: Was the main airport for Arctic Bay , until they expanded the Arctic Bay Airport . The airport is about 19 km (12 mi) directly southeast of Arctic Bay but the road between them is 32 km (20 mi). Nanisivik has a tundra climate ( ET ) with long, cold winters and very short, chilly summers that are rarely mild. Early winter tends to be snowiest period of the year, with around 40% of all yearly snowfall falling during this short period. Zinc Zinc
11880-655: Was to establish a Greek puppet state , which would permit the Italian annexation of the Sporades and Cyclades islands in the Aegean Sea, to be administered as a part of the Italian Aegean Islands . The German invasion resulted in the Axis occupation of Greece . The German troops evacuated Athens on 12 October 1944, and by the end of the month, they had withdrawn from mainland Greece. Greece was then liberated by Allied troops. Many of
11990-478: Was used as early as the third millennium BC in the Aegean area and the region which currently includes Iraq , the United Arab Emirates , Kalmykia , Turkmenistan and Georgia . In the second millennium BC it was used in the regions currently including West India , Uzbekistan , Iran , Syria , Iraq, and Israel . Zinc metal was not produced on a large scale until the 12th century in India, though it
12100-503: Was used through 1851. German chemist Andreas Marggraf normally gets credit for isolating pure metallic zinc in the West, even though Swedish chemist Anton von Swab had distilled zinc from calamine four years previously. In his 1746 experiment, Marggraf heated a mixture of calamine and charcoal in a closed vessel without copper to obtain a metal. This procedure became commercially practical by 1752. William Champion's brother, John, patented
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