Scorodite, Gold Hill, Utah
(repeating unit) FeAsO
Strunz classification 08.CD.10
Unit cell a = 8.937Å, b = 10.278Å, c = 9.996Å
Green, blue-green, grey, grayish-green, blue, yellow-brown, nearly colourless, violet
Crystal system Orthorhombic
Mohs scale hardness 3.5-4
Luster Sub-Adamantine, Vitreous, Resinous
Density measured: 3.27 g/cm3 calculated: 3.276 g/cm3
2V angle Measured: 40° to 75° Calculated: 46° to 80°
Dispersion relatively strong r > v
Scorodite is a common hydrated iron arsenate mineral, with the chemical formula FeAsO 4·2H 2O. It is found in hydrothermal deposits and as a secondary mineral in gossans worldwide. Scorodite weathers to limonite.
Scorodite was discovered in the
Schwarzenberg, Saxony district, Erzgebirge, Saxony, Germany. Named from the Greek Scorodion, "garlicky". When heated it smells of garlic, which gives it the name.
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