|
Scorodite |
Chemical Formula |
FeAsO4·2H2O |
Species |
Phosphates |
Crystal System |
Orthorhombic |
Mohs Scale |
3-4 |
Specific Gravity |
3.276 |
Color |
Green, blue-green, grey, grayish-green, blue, yellow-brown, nearly colourless, Purple; colourless to faintly greenish or greenish brown in transmitted light. |
Streak |
Greenish-White |
Luster |
Sub-Adamantine, Vitreous, Resinous |
Refractive Index |
n = 1.741 - 1.784 n = 1.744 - 1.805 n = 1.768 - 1.820 |
Diaphaneity |
Translucent |
Cleavage |
Imperfect/FairImperfect on , traces on |
Fracture |
Sub-Conchoidal |
Crystal Habit:Crystals commonly pyramidal (sometimes pseudo-octahedral), tabular , or prismatic. Commonly aggregated into crusts or irregular groups. Also occurs massive, crystalline or porous and sinter-like, earthy. |
Geological Setting:In the secondary oxidation zone of iron bearing arsenides, in gossans; also observed in a primary hydrothermal deposit (Saubach). |
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.