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Cassiterite

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Cassiterite is a tin oxide mineral , SnO 2 . It is generally opaque , but it is translucent in thin crystals. Its luster and multiple crystal faces produce a desirable gem. Cassiterite was the chief tin ore throughout ancient history and remains the most important source of tin today.

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58-484: Most sources of cassiterite today are found in alluvial or placer deposits containing the weathering-resistant grains. The best sources of primary cassiterite are found in the tin mines of Bolivia , where it is found in crystallised hydrothermal veins. Rwanda has a nascent cassiterite mining industry. Fighting over cassiterite deposits (particularly in Walikale ) is a major cause of the conflict waged in eastern parts of

116-434: A res publica as long as it continued to use Latin as its official language. Rome acquired imperial character de facto from the 130s BC with the acquisition of Cisalpine Gaul , Illyria , Greece and Hispania , and definitely with the addition of Iudaea , Asia Minor and Gaul during the 1st century BC. At the time of the empire's maximal extension during the reign of Trajan (AD 117), Rome controlled

174-522: A heavy helmet, fitted to his temples, a fair helm, richly-dight, and set thereon a crest of gold; and he wrought him greaves of pliant tin. But when the glorious god of the two strong arms had fashioned all the armour Liddell-Scott-Jones suggest the etymology to be originally Elamite ; citing the Babylonian kassi-tira, hence the sanskrit kastīram . However the Akkadian word (the lingua franca of

232-616: A hydraulic mining method known as streaming . The current major tin production comes from placer or alluvial deposits in Malaysia , Thailand , Indonesia , the Maakhir region of Somalia , and Russia . Hydraulic mining methods are used to concentrate mined ore, a process which relies on the high specific gravity of the SnO 2 ore, of about 7.0. Crystal twinning is common in cassiterite and most aggregate specimens show crystal twins. The typical twin

290-727: A result of the crisis of the third century . During Late antiquity Christianity became increasingly popular, finally ousting the Roman imperial cult with the Theodosian decrees of 393. Successive invasions of Germanic tribes finalized the weakening of the Western Roman Empire during the 5th century, while the Eastern Roman Empire persisted throughout the Middle Ages , in a state called Romania by its citizens, and designated

348-623: A series of conflicts of the 4th and 3rd centuries, the Samnite Wars , Latin War , and Pyrrhic War . Roman victory in the Punic Wars and Macedonian Wars established Rome as a super-regional power by the 2nd century BC, followed by the acquisition of Greece and Asia Minor . This tremendous increase of power was accompanied by economic instability and social unrest, resulting in the Catiline conspiracy ,

406-523: Is also sometimes called alluvial deposit . Alluvium is typically geologically young and is not consolidated into solid rock. Sediments deposited underwater, in seas, estuaries , lakes, or ponds, are not described as alluvium. Floodplain alluvium can be highly fertile, and supported some of the earliest human civilizations. The present consensus is that "alluvium" refers to loose sediments of all types deposited by running water in floodplains or in alluvial fans or related landforms . However,

464-501: Is bent at a near-60-degree angle, forming an "elbow twin". Botryoidal or reniform cassiterite is called wood tin . Cassiterite is also used as a gemstone and collector specimens when quality crystals are found. The name derives from the Greek κασσίτερος ( transliterated as "kassiteros") for "tin". Early references to κασσίτερος can be found in Homer 's Iliad , such as in the description

522-467: Is often considered to begin with the earliest recorded Epic Greek poetry of Homer (8th–7th-century BC) and ends with the end of the Western Roman Empire in 476 AD. Such a wide span of history and territory covers many disparate cultures and periods. Classical antiquity may also refer to an idealized vision among later people of what was, in Edgar Allan Poe 's words, "the glory that was Greece, and

580-525: Is often referred to as "cover" because these sediments obscure the underlying bedrock . Most sedimentary material that fills a basin ("basin fill") that is not lithified is typically lumped together as "alluvial". Alluvium of Pliocene age occurs, for example, in parts of Idaho. Alluvium of late Miocene age occurs, for example, in the valley of the San Joaquin River , California. Classical antiquity Classical antiquity , also known as

638-605: The Ancient Near East , including Babylonia) for tin was " anna-ku " (cuneiform: 𒀭𒈾). Roman Ghirshman (1954) suggests, from the region of the Kassites , an ancient people in west and central Iran ; a view also taken by J D Muhly. There are relatively few words in Ancient Greek at begin with "κασσ-"; suggesting that it is an ethnonym . Attempts at understanding the etymology of the word were made in antiquity , such as Pliny

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696-483: The Bassarika . From there comes tin . It may be primary used as a raw material for tin extraction and smelting. Alluvium Alluvium (from Latin alluvius , from alluere  'to wash against') is loose clay , silt , sand , or gravel that has been deposited by running water in a stream bed, on a floodplain , in an alluvial fan or beach , or in similar settings. Alluvium

754-543: The Byzantine Empire by later historians. Hellenistic philosophy was succeeded by continued development of Platonism and Epicureanism , with Neoplatonism in due course influencing the theology of the Christian Church Fathers . Many writers have attempted to name a specific date for the symbolic "end" of antiquity, with the most prominent dates being the deposing of the last Western Roman Emperor in 476,

812-597: The Byzantine Papacy . The Eastern Roman empire's capital city Constantinople remained the only unconquered large urban site of the original Roman empire, as well as being the largest city in Europe. Yet many classical books, sculptures, and technologies survived there along with classical Roman cuisine and scholarly traditions, well into the Middle Ages, when much of it was "rediscovered" by visiting Western crusaders. Indeed,

870-513: The Catholic Church in particular maintained Latin language, culture, and literacy for centuries; to this day the popes are termed Pontifex Maximus which during the classical period was a title belonging to the emperor, and the ideal of Christendom continued the legacy of a united European civilization even after its political unity had ended. The political idea of an Emperor in the West to match

928-833: The Democratic Republic of the Congo . This has led to cassiterite being considered a conflict mineral . Cassiterite is a widespread minor constituent of igneous rocks . The Bolivian veins and the 4500 year old workings of Cornwall and Devon , England , are concentrated in high temperature quartz veins and pegmatites associated with granitic intrusives . The veins commonly contain tourmaline , topaz , fluorite , apatite , wolframite , molybdenite , and arsenopyrite . The mineral occurs extensively in Cornwall as surface deposits on Bodmin Moor , for example, where there are extensive traces of

986-563: The Muslim conquests of the 7th century finalized the irreversible loss of all the largest Eastern Roman imperial cities besides the capital itself. The emperor Heraclius in Constantinople , who reigned during this period, conducted his court in Greek, not Latin, though Greek had always been an administrative language of the eastern Roman regions. Eastern-Western associations weakened with the ending of

1044-589: The Sabines to a festival and stole their unmarried maidens, resulting the integration of Latins and Sabines. Archaeological evidence indeed shows first traces of settlement at the Roman Forum in the mid-8th century BC, though settlements on the Palatine Hill may date back to the 10th century BC. According to legend, the seventh and final king of Rome was Tarquinius Superbus . As the son of Tarquinius Priscus and

1102-469: The Shield of Achillies . For example, the passage in book 18 chapter 610: αὐτὰρ ἐπεὶ δὴ τεῦξε σάκος μέγα τε στιβαρόν τε, 610τεῦξ᾽ ἄρα οἱ θώρηκα φαεινότερον πυρὸς αὐγῆς, τεῦξε δέ οἱ κόρυθα βριαρὴν κροτάφοις ἀραρυῖαν καλὴν δαιδαλέην, ἐπὶ δὲ χρύσεον λόφον ἧκε, τεῦξε δέ οἱ κνημῖδας ἑανοῦ κασσιτέροιο. Translated as: then wrought he for him a corselet brighter than the blaze of fire, and he wrought for him

1160-755: The Social War and the First Triumvirate , and finally the transformation to the Roman Empire during the latter half of the 1st century BC. The precise end of the Republic is disputed by modern historians; Roman citizens of the time did not recognize that the Republic had ceased to exist. The early Julio-Claudian Emperors maintained that the res publica still existed, albeit protected by their extraordinary powers, and would eventually return to its earlier Republican form. The Roman state continued to term itself

1218-638: The classical era , classical period , classical age , or simply antiquity , is the period of cultural European history between the 8th century BC and the 5th century AD comprising the interwoven civilizations of ancient Greece and ancient Rome known together as the Greco-Roman world , centered on the Mediterranean Basin . It is the period during which ancient Greece and ancient Rome flourished and had major influence throughout much of Europe , North Africa , and West Asia . Conventionally, it

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1276-584: The classical orders of architecture. The philosophy of St. Thomas Aquinas was derived largely from that of Aristotle , despite the intervening change in religion from Hellenic Polytheism to Christianity . Greek and Roman authorities such as Hippocrates and Galen formed the basis of the practice of medicine even longer than Greek thought prevailed in philosophy. In the French theater , playwrights such as Molière and Racine wrote plays on mythological or classical historical subjects and subjected them to

1334-599: The red-figure style , developed by the Andokides Painter in about 530 BC. Greek colonisation refers to the expansion of Archaic Greeks , particularly during the 8th–6th centuries BC , across the Mediterranean Sea and the Black Sea . The Etruscans had established political control in the region by the late 7th-century BC, forming the aristocratic and monarchial elite. The Etruscans apparently lost power in

1392-477: The 18th and 19th centuries. The earliest period of classical antiquity occurs during a time of gradual resurgence of historical sources after the Late Bronze Age collapse . The 8th and 7th centuries BC are still largely protohistorical , with the earliest Greek alphabetic inscriptions appearing during the first half of the 8th century. The legendary poet Homer is usually assumed to have lived during

1450-562: The 19th century. John Milton and even Arthur Rimbaud received their first poetic educations in Latin. Genres like epic poetry, pastoral verse, and the frequent use of characters and themes from Greek mythology affected Western literature greatly. In architecture, there have been several Greek Revivals , which seem more inspired in retrospect by Roman architecture than Greek. Washington, DC has many large marble buildings with façades made to look like Greek temples , with columns constructed in

1508-897: The 8th or 7th century BC, and his lifetime is often considered as the beginning of classical antiquity. During the same period is the traditional date for the establishment of the Ancient Olympic Games , in 776 BC. The Phoenicians originally expanded from ports in Canaan , by the 8th century dominating trade in the Mediterranean . Carthage was founded in 814 BC, and the Carthaginians by 700 BC had established strongholds in Sicily , Italy and Sardinia , which created conflicts of interest with Etruria . A stele found in Kition , Cyprus commemorates

1566-631: The Dark Ages). In pottery, the Archaic period sees the development of the Orientalizing style , which signals a shift from the geometric style of the later Dark Ages and the accumulation of influences derived from Egypt, Phoenicia and Syria . Pottery styles associated with the later part of the Archaic age are the black-figure pottery , which originated in Corinth during the 7th-century BC and its successor,

1624-589: The Eastern Roman capital ( first in 674–78 and then in 717–18 ) severed the economic, cultural, and political links that had traditionally united the classical cultures around the Mediterranean, ending antiquity (see Pirenne Thesis ). The original Roman Senate continued to express decrees into the late 6th century, and the last Eastern Roman emperor to use Latin as the language of his court in Constantinople

1682-531: The Elder in his Historia Naturalis (book 34 chapter 37.1): " White lead (tin) is the most valuable; the Greeks applied to it the name cassheros ". And Stephanus of Byzantium in his Ethnica states: "Κασσίτερα νησοσ εν τω Ωκεανω, τη Ίνδικη προσεχης, ως Διονυσιοσ εν Βασσαρικοισ. Εξ ης ο κασσίτερος ." Which can be translated as: Kassitera, an island in the ocean , neighbouring India , as Dionysius states in

1740-569: The Emperor in the East continued after the Western Roman Empire's collapse; it was revived by the coronation of Charlemagne in 800; the self-described Holy Roman Empire ruled central Europe until 1806. The Renaissance idea that the classical Roman virtues had been lost as a result of medievalism was especially powerful in European politics of the 18th and 19th centuries. Reverence for Roman republicanism

1798-565: The Great in 323 BC. In 510, Spartan troops helped the Athenians overthrow the tyrant Hippias , son of Peisistratos . Cleomenes I , king of Sparta, established a pro-Spartan oligarchy conducted by Isagoras . The Greco-Persian Wars (499–449 BC), concluded by the Peace of Callias ended with not only the liberation of Greece, Macedon , Thrace , and Ionia from Persian rule , but also with

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1856-470: The Greeks. Fathers had great power over their children, and husbands over their wives. In fact, the word family, familia in Latin, actually referred to those who were subject to the authority of a male head of household. This included non-related members such as slaves and servants. By marriage, both men and women shared property. Divorce was allowed first during the first century BC and could be done by either man or woman. The Roman Empire began to weaken as

1914-512: The Senate and had Superbus and the monarchy expelled from Rome in 510 BC. After Superbus' expulsion, the Senate in 509 BC voted to never again allow the rule of a king and reformed Rome into a republican government . The classical period of Ancient Greece corresponds to most of the 5th and 4th centuries BC, in particular, from the end of the Athenian tyranny in 510 BC to the death of Alexander

1972-557: The area by the late 6th-century BC, and at this time, the Italic tribes reinvented their government by creating republics , with greater restraints on the ability of individual rulers to exercise power. According to legend, Rome was founded on 21 April 753 BC by twin descendants of the Trojan prince Aeneas , Romulus and Remus . As the city was bereft of women, legend says that the Latins invited

2030-505: The closing of the last Platonic Academy in Athens by the Eastern Roman emperor Justinian I in 529, and the conquest of much of the Mediterranean by the new Muslim faith from 634 to 718. These Muslim conquests, of Syria (637), Egypt (639), Cyprus (654), North Africa (665), Hispania (718), Southern Gaul (720), Crete (820), and Sicily (827), Malta (870), as well as the sieges of

2088-667: The creation of a new Greek state in 1832. After the capture of Constantinople in 1453, the Russian Czars (a title derived from Caesar) claimed the Byzantine legacy as the champion of Orthodoxy ; Moscow was described as the " Third Rome ", and the Czars ruled as divinely appointed Emperors into the 20th century. Despite the fact that the Western Roman secular authority disappeared entirely in Europe, it still left traces. The Papacy and

2146-647: The cultures of Persia , the Kingdom of Israel and Kingdom of Judah , Central Asia and Egypt . Significant advances were made in the sciences ( geography , astronomy , mathematics , etc.), notably with the followers of Aristotle ( Aristotelianism ). The Hellenistic period ended with the increase of the Roman Republic to a super-regional power during the 2nd century BC and the Roman conquest of Greece in 146 BC. The Republican period of Ancient Rome began with

2204-480: The disappearance of imperial authority in the west. This tendency reached its maximum when Charlemagne was crowned "Roman Emperor" in the year 800, an act which resulted in the formation of the Holy Roman Empire . The notion that an emperor is a monarch who outranks a king dates from this period. In this political ideal, there would always be a Roman Empire, a state the jurisdiction of which extended through

2262-638: The dominance of Athens in the Delian League , which resulted in conflict with Sparta and the Peloponnesian League , resulting in the Peloponnesian War (431–404 BC), ending with a Spartan victory. Greece began the 4th century with Spartan hegemony , but by 395 BC the Spartan rulers dismissed Lysander from office, and Sparta lost its naval supremacy. Athens , Argos , Thebes and Corinth ,

2320-510: The entire Mediterranean as well as Gaul, parts of Germania and Britannia , the Balkans , Dacia , Asia Minor, the Caucasus , and Mesopotamia . Culturally, the Roman Empire was significantly Hellenized , but also incorporated syncretic "eastern" traditions, such as Mithraism , Gnosticism , and most notably Christianity . Classical Rome had vast differences within their family life compared to

2378-573: The entire civilized western world. That model continued to exist in Constantinople for the entirety of the Middle Ages, where the Byzantine Emperor was considered the sovereign of the entire Christian world. The Patriarch of Constantinople was the Empire's highest-ranked cleric, but even he was subordinate to the emperor, who was "God's Vicegerent on Earth". The Greek-speaking Byzantines and their descendants continued to call themselves " Romioi " until

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2436-529: The fringes of India . The classical Greek period conventionally ends at the death of Alexander in 323 BC and the fragmentation of his empire, which was at this time divided among the Diadochi . Greece began the Hellenistic period with the increasing power of Macedon and the conquests of Alexander the Great . Greek became the lingua franca far beyond Greece itself, and Hellenistic culture interacted with

2494-451: The grandeur that was Rome". The culture of the ancient Greeks , together with some influences from the ancient Near East , was the basis of art, philosophy, society, and education in the Mediterranean and Near East until the Roman imperial period . The Romans preserved, imitated, and spread this culture throughout Europe, until they were able to compete with it. This Greco-Roman cultural foundation has been immensely influential on

2552-596: The inhabitants of Constantinople continued to refer to themselves as Romans, as did their eventual conquerors in 1453, the Ottomans (see Romaioi and Rûm .) The classical scholarship and culture that was still preserved in Constantinople were brought by refugees fleeing its conquest in 1453 and helped to begin the Renaissance (see Greek scholars in the Renaissance ). Ultimately, it was a slow, complex, and graduated change of

2610-412: The language, politics, law, educational systems, philosophy , science, warfare, literature, historiography, ethics, rhetoric, art and architecture of both the Western , and through it, the modern world. Surviving fragments of classical culture helped produce a revival beginning during the 14th century which later came to be known as the Renaissance , and various neo-classical revivals occurred during

2668-408: The late 19th century. "Colluvium" is now generally understood as sediments produced by gravity-driven transport on steep slopes. At the same time, the definition of "alluvium" has switched back to an emphasis on sediments deposited by river action. There continues to be disagreement over what other sediment deposits should be included under the term "alluvium". Most alluvium is Quaternary in age and

2726-417: The latter two of which were formerly Spartan allies, challenged Spartan dominance in the Corinthian War , which ended inconclusively in 387 BC. Later, in 371 BC, the Theban generals Epaminondas and Pelopidas won a victory at the Battle of Leuctra . The result of this battle was the end of Spartan supremacy and the establishment of Theban hegemony . Thebes sought to maintain its dominance until it

2784-449: The meaning of the term has varied considerably since it was first defined in the French dictionary of Antoine Furetière , posthumously published in 1690. Drawing upon concepts from Roman law , Furetière defined alluvion (the French term for alluvium) as new land formed by deposition of sediments along rivers and seas. By the 19th century, the term had come to mean recent sediments deposited by rivers on top of older diluvium , which

2842-424: The overthrow of the Monarchy c. 509 BC and lasted more than 450 years until its subversion through a series of civil wars , into the Principate form of government and the Imperial period. During the half millennium of the Republic, Rome increased from a regional power of the Latium to the dominant force in Italy and beyond. The unification of Italy by the Romans was a gradual process, brought about by

2900-433: The socio-economic structure in European history that resulted in the changeover between classical antiquity and medieval society and no specific date can truly exemplify that. In politics, the late Roman conception of the Empire as a universal state, commanded by one supreme divinely appointed ruler, united with Christianity as a universal religion likewise headed by a supreme patriarch , proved very influential, even after

2958-468: The son-in-law of Servius Tullius , Superbus was of Etruscan birth. It was during his reign that the Etruscans reached their apex of power. Superbus removed and destroyed all the Sabine shrines and altars from the Tarpeian Rock , enraging the people of Rome. The people came to object to his rule when he failed to recognize the rape of Lucretia , a patrician Roman, by his own son. Lucretia's kinsman, Lucius Junius Brutus (ancestor to Marcus Brutus ), summoned

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3016-622: The state, as can be seen in the architecture of the Panthéon , the Arc de Triomphe , and the paintings of Jacques-Louis David . During the revolution, France transitioned from kingdom to republic to dictatorship to Empire (complete with Imperial Eagles) that the Romans had experienced centuries earlier. Classical antiquity is a general term for a long period of cultural history . Such a wide sampling of history and territory covers many rather disparate cultures and periods. "Classical antiquity" often refers to an idealized vision of later people, of what was, in Edgar Allan Poe 's words, "the glory that

3074-443: The victory of King Sargon II in 709 BC over the seven kings of the island, marking an important part of the transfer of Cyprus from Tyrian rule to the Neo-Assyrian Empire . The Archaic period followed the Greek Dark Ages , and saw significant advancements in political theory , and the beginnings of democracy , philosophy , theatre , poetry , as well as the revitalization of the written language (which had been lost during

3132-431: Was Greece , the grandeur that was Rome !" During the 18th and 19th centuries AD, reverence for classical antiquity was much greater in Europe and the United States than it is now. Respect for the ancient people of Greece and Rome affected politics , philosophy , sculpture , literature , theatre , education , architecture , and sexuality . Epic poetry in Latin continued to be written and circulated well into

3190-489: Was emperor Maurice , who reigned until 602. The overthrow of Maurice by his mutinying Danube army commanded by Phocas resulted in the Slavic invasion of the Balkans and the weakening of Balkan and Greek urban culture (resulting in the flight of Balkan Latin speakers to the mountains, see Origin of the Romanians ), and also provoked the Byzantine–Sasanian War of 602–628 in which all the great eastern cities except Constantinople were lost. The resulting turmoil did not end until

3248-438: Was finally ended by the increasing power of Macedon in 346 BC. During the reign of Philip II , (359–336 BC), Macedon expanded into the territory of the Paeonians , the Thracians and the Illyrians . Philip's son, Alexander the Great , (356–323 BC) managed to briefly extend Macedonian power not only over the central Greek city-states but also to the Persian Empire , including Egypt and lands as far east as

3306-528: Was similar in character but interpreted as sediments deposited by Noah's flood . With the rejection by geologists of the concept of a primordial universal flood, the term "diluvium" fell into disfavor and was replaced with "older alluvium". At the same time, the term "alluvium" came to mean all sediment deposits due to running water on plains. The definition gradually expanded to include deposits in estuaries, coasts, and young rock of marine and fluvial origin. Alluvium and diluvium were grouped as colluvium in

3364-437: Was strong among the Founding Fathers of the United States and the Latin American revolutionaries; the Americans described their new government as a republic (from res publica ) and gave it a Senate and a President (another Latin term), rather than use available English terms like commonwealth or parliament . Similarly in Revolutionary and Napoleonic France, republicanism and Roman martial virtues were promoted by

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