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Cassiterite

Cassiterite is a tin oxide mineral, SnO2. 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. It is also a semiconductor.

Occurrence, Etymology & Gallery

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Occurrence

AlluvialPlacerBoliviaHydrothermalRwanda
32 related topics

Etymology

GreekTransliteratedHomerIliadShield of Achilles
27 related topics

Gallery

BipyramidsSichuanTasmaniaDurango
4 related topics

Crystallography

Crystal twinningBotryoidalGemstone
3 related topics

Key facts & relationships

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Birefringence
δ = 0.103
Category
Oxide minerals
Cleavage
{100} imperfect, {110} indistinct; partings on {111} or {011}
Color
Black, brownish black, reddish brown, brown, red, yellow, gray, white; rarely colorless
Crystal class
Ditetragonal dipyramidal (4/mmm) H-M symbol: (4/m 2/m 2/m)
Crystal habit
Pyramidic, prismatic, radially fibrous botryoidal crusts and concretionary masses; coarse to fine granular, massive

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Overview

Occurrence

Crystallography

Etymology

Gallery

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Map overview Semantic statistics

Cassiterite

Nodes80
Edges79
Triples60
Avg. degree1.98
Density0.025
Components1

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Cassiterite

Top relations

related to Occurrence · 22
Cassiterite → Bodmin Moor, Bolivia, Congo, Cornwall, Democratic Republic, Devon, England, Fighting, Hydraulic, Indonesia, Maakhir, Malaysia, Most, Russia, Rwanda, SnO2, Somalia, Thailand, The, The Bolivian
related to Gallery · 8
Cassiterite → Australia, Blue Tier, ChinaClose, Durango, Mexico, Sichuan, Tasmania, Wood
related to Crystallography · 3
Cassiterite → Botryoidal, Crystal, The
is a · 2
Cassiterite → tin oxide mineral, widespread minor constituent of igneous rocks
Birefringence · 1
Cassiterite → δ = 0.103
Category · 1
Cassiterite → Oxide minerals
Cleavage · 1
Cassiterite → {100} imperfect, {110} indistinct; partings on {111} or {011}
Color · 1
Cassiterite → Black, brownish black, reddish brown, brown, red, yellow, gray, white; rarely colorless
Crystal class · 1
Cassiterite → Ditetragonal dipyramidal (4/mmm) H-M symbol: (4/m 2/m 2/m)
Crystal habit · 1
Cassiterite → Pyramidic, prismatic, radially fibrous botryoidal crusts and concretionary masses; coarse to fine granular, massive

Important terminology Word statistics

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Important terminology

tin ancient sno2 crystal etymology references found deposits mineral crystals also κασσίτερος opaque luster oxide ore veins mining used today

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
CassiteriteBirefringenceδ = 0.1031.00infobox
CassiteriteCategoryOxide minerals1.00infobox
CassiteriteCleavage{100} imperfect, {110} indistinct; partings on {111} or {011}1.00infobox
CassiteriteColorBlack, brownish black, reddish brown, brown, red, yellow, gray, white; rarely colorless1.00infobox
CassiteriteCrystal classDitetragonal dipyramidal (4/mmm) H-M symbol: (4/m 2/m 2/m)1.00infobox
CassiteriteCrystal habitPyramidic, prismatic, radially fibrous botryoidal crusts and concretionary masses; coarse to fine granular, massive1.00infobox
CassiteriteCrystal systemTetragonal1.00infobox
CassiteriteDiaphaneityTransparent when light colored, dark material nearly opaque; commonly zoned1.00infobox
CassiteriteFormulaSnO21.00infobox
CassiteriteFractureSubconchoidal to uneven1.00infobox
CassiteriteFusibilityinfusible1.00infobox
CassiteriteIMA symbolCst1.00infobox
CassiteriteLusterAdamantine to adamantine metallic, splendent; may be greasy on fractures1.00infobox
CassiteriteMohs scale hardness6–71.00infobox
CassiteriteOptical propertiesUniaxial (+)1.00infobox
CassiteritePleochroismPleochroic haloes have been observed. Dichroic in yellow, green, red, brown, usually weak, or absent, but strong at times1.00infobox
CassiteriteRefractive indexnω = 1.990–2.010 nε = 2.093–2.1001.00infobox
CassiteriteSolubilityinsoluble1.00infobox
CassiteriteSpace groupP42/mnm1.00infobox
CassiteriteSpecific gravity6.98–7.11.00infobox
CassiteriteStreakWhite to brownish1.00infobox
CassiteriteStrunz classification4.DB.051.00infobox
CassiteriteTenacityBrittle1.00infobox
CassiteriteTwinningVery common on {011}, as contact and penetration twins, geniculated; lamellar1.00infobox
CassiteriteUnit cella = 4.7382(4) Å, c = 3.1871(1) Å; Z = 21.00infobox
Cassiteriteis atin oxide mineral0.90text
Cassiteriteis awidespread minor constituent of igneous rocks0.90text

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