Formula: FeAsO4.2H2O
Origin of name: from Greek for Garlic
Crystal system: orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell: a = 8.952 Å, b = 10.33 Å, c = 10.04 Å
Colour: pale grayish green, yellowish brown to brown, colourless
Diaphaneity:
Luster: vitreous to resinous
Habit: crystals pyramidal, tabular or short prismatic, drusy crusts, irregular groups, massive, crystalline, porous, dense, earthy
Hardness: 3.5 to 4
Specific gravity: 3.28
Cleavage: 3; {201} imperfect, {001} and {100} trace
Tenacity: subconchoidal, brittle
Streak:
Synonyms/varieties:
Comments: series with mansfieldite
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