Formula: (Zn,Fe,Mn)Al2(SO4)4 . 22H2O
Origin of name: For G. Dietrich, Czech chemist
Crystal system: Monclinic
Crystal class: 2/m
Twinning:
Unit cell: a = 6.24, b = 24.434, c = 21.379, β = 100.1°
Colour: Grayish white to brownish yellow
Diaphaneity: Transparent
Luster: Silky
Habit: Fibrous crust
Hardness: 2
Specific gravity: 1.86
Cleavage: None
Tenacity:
Streak: White
Synonyms/varieties:
Comments:
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