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Category Arsenate minerals
(repeating unit)
Strunz classification 8.CD.10
Crystal system Orthorhombic
Crystal class Dipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)
Space group Pcab
Unit cell a = 8.937 Å, b = 10.278 Å
c = 9.996 Å; Z = 8
Color Green, blue-green, grey, grayish-green, blue, yellow-brown, nearly colorless, violet
Fracture Sub-Conchoidal
Mohs scale hardness 3.5-4
Luster Sub-Adamantine, Vitreous, Resinous
Streak Greenish-White
Diaphaneity Translucent
Density measured: 3.27 g/cm3 calculated: 3.276 g/cm3
Optical properties Biaxial (+)
Pleochroism Weak
2V angle Measured: 40° to 75° Calculated: 46° to 80°
Dispersion relatively strong r > v
References [1]

Scorodite is a common hydrated iron arsenate mineral, with the chemical formula FeAsO4·2H2O. 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.


Further reading[edit]

  • Palache, C., H. Berman, and C. Frondel (1951) Dana’s system of mineralogy, (7th edition), v. II, pp. 763–767

External links[edit]