Formula: FeFe4(PO4)4(OH)2 . 2H2O
Origin of name: For Gini Keller, wife of Paul Keller who described mineral
Crystal system: Monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: Blackish-green to blackish-brown
Diaphaneity:
Luster: Vitreous to greasy
Habit: Crystals euhedral
Hardness: 3 to 4
Specific gravity: 3.41
Cleavage: None
Tenacity:
Streak: Olive
Synonyms/varieties:
Comments:
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