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Smithsonite

Smithsonite, also known as zinc spar, is the mineral form of zinc carbonate (ZnCO3). Historically, smithsonite was identified with hemimorphite before it was realized that they were two different minerals. The two minerals are very similar in appearance and the term calamine has been used for both, leading to some confusion. The distinct mineral…

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Overview

Zinc carbonateZnCO3HemimorphiteCalamine
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Gallery

Drusy
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Key facts & relationships

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Birefringence
δ = 0.223 – 0.227
Category
Carbonate mineral
Cleavage
Perfect on
Color
White, grey, yellow, green to apple-green, blue, pink, purple, bluish grey, and brown
Crystal class
Hexagonal scalenohedral (3m) H-M symbol: (3 2/m)
Crystal habit
Uncommon as crystals, typically botryoidal, reniform, spherulitic; stalactitic, earthy, compact massive

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  • ISBN ISBN (identifier)

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Smithsonite

Nodes36
Edges35
Triples54
Avg. degree1.94
Density0.055556
Components1

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Smithsonite

Top relations

related to Bibliography · 18
Smithsonite → Birth, Bloomsbury ISBN, CO, Denver, Ewing, Gloria Staebler, Heather, James Smithson, Lithographie ISBN, London, New York, Revolution, Science, Smithsonian, Suzanne Liebetrau, The Lost World, Think Zinc, Tom Hughes
related to Gallery · 12
Smithsonite → Botryoidal, Crystals, Durango, GreeceCrystals, Kelly Mine, Lavrion District Mines, Mapimi, MexicoBotryoidal, Mun, New Mexico, Ojuela Mine, Tsumeb
Birefringence · 1
Smithsonite → δ = 0.223 – 0.227
Category · 1
Smithsonite → Carbonate mineral
Cleavage · 1
Smithsonite → Perfect on
Color · 1
Smithsonite → White, grey, yellow, green to apple-green, blue, pink, purple, bluish grey, and brown
Crystal class · 1
Smithsonite → Hexagonal scalenohedral (3m) H-M symbol: (3 2/m)
Crystal habit · 1
Smithsonite → Uncommon as crystals, typically botryoidal, reniform, spherulitic; stalactitic, earthy, compact massive
Crystal system · 1
Smithsonite → Trigonal
Diaphaneity · 1
Smithsonite → Translucent

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Important terminology

mineral crystals ore botryoidal two occurs carbonate yellow zinc minerals hemimorphite trigonal james identified leading sometimes also pink znco3 habit

Entity relationships Subject–Predicate–Object triples

SubjectPredicateObjectConfidenceSrc
SmithsoniteBirefringenceδ = 0.223 – 0.2271.00infobox
SmithsoniteCategoryCarbonate mineral1.00infobox
SmithsoniteCleavagePerfect on1.00infobox
SmithsoniteColorWhite, grey, yellow, green to apple-green, blue, pink, purple, bluish grey, and brown1.00infobox
SmithsoniteCrystal classHexagonal scalenohedral (3m) H-M symbol: (3 2/m)1.00infobox
SmithsoniteCrystal habitUncommon as crystals, typically botryoidal, reniform, spherulitic; stalactitic, earthy, compact massive1.00infobox
SmithsoniteCrystal systemTrigonal1.00infobox
SmithsoniteDiaphaneityTranslucent1.00infobox
SmithsoniteFormulaZnCO31.00infobox
SmithsoniteFractureUneven, sub-conchoidal1.00infobox
SmithsoniteIMA symbolSmt1.00infobox
SmithsoniteLusterVitreous, may be pearly1.00infobox
SmithsoniteMohs scale hardness4.51.00infobox
SmithsoniteOptical propertiesUniaxial (−)1.00infobox
SmithsoniteRefractive indexnω = 1.842 – 1.850 nε = 1.619 – 1.6231.00infobox
SmithsoniteSpace groupR3c1.00infobox
SmithsoniteSpecific gravity4.4–4.51.00infobox
SmithsoniteStreakWhite1.00infobox
SmithsoniteStrunz classification5.AB.051.00infobox
SmithsoniteTenacityBrittle1.00infobox
SmithsoniteTwinningNone observed1.00infobox
SmithsoniteUltraviolet fluorescenceMay fluoresce pale green or pale blue under UV1.00infobox
SmithsoniteUnit cella = 4.6526(7) c = 15.0257(22) [Å]; Z = 61.00infobox
Smithsoniteis avariably colored trigonal mineral which only rarely is found in well formed crystals0.90text

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