Minerals

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General Information

Adamite

Pure adamite is colourless, but can gain colour by the pressence of iron (yellow) or copper (green). Adamite was named after the French mineralogist Gilbert Joseph Adam (1795-1881).[1]

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Chemical & Physical Information

Trivial NameAdamite
Chemical NameZinc Arsenate Hydroxide
Chemical FormulaZn2AsO4OH
Density4,4 g·cm-3
Molar mass?
Hardness3,5
Crytal systemOrthorhombic
Unit cell?
Crystal habitRadial clusters
FractureBrittle
CleavageGood [101], bad [010]
ColourColourless, yellow to violet
LusterAdamantine
StreakWhite
OpacityTranslucent
SafetySafe
ExtraFluorescent
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Photos

Adamite

(5 cm)

Adamite

(2 cm)

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Sources

[1] Wikipedia

[2] Specimen from my personal collection, photo taken by me.