Formula: Fe(SO4)(OH) . 5H2O
Origin of name: From Latin for fiber and iron
Crystal system: Monoclinic
Crystal class: -3
Twinning:
Unit cell:
Colour: White to pale yellow, greenish gray, pale green to yellowish green
Diaphaneity:
Luster: Silky, pearly, submetallic
Habit: Fine fibrous forming crusts and masses; radial fibrous; botryoidal
Hardness: 2.5
Specific gravity: 1.92
Cleavage: 1; {0001} perfect
Tenacity:
Streak:
Synonyms/varieties:
Comments: Decomposed by water; hardness approximate
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