Formula: KFe(SO4)2 . H2O
Origin of name: For E. Kraus, American mineralogist
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Pale lemon-yellow, pale green
Diaphaneity: Transparent
Luster: Vitreous
Habit: Crystals short prismatic or tabular to equant; crusts
Hardness: 2.5
Specific gravity: 2.84
Cleavage: 2; {001} perfect, {100} good
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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