Formula: (Fe,Mn,Mg)3(PO4)2
Origin of name: from Greek for flesh and to view
Crystal system: monoclinic
Crystal class: 2/m
Twinning:
Unit cell:
Colour: colourless when fresh, alters to gray to brown to reddish brown
Diaphaneity: transparent to translucent
Luster: vitreous to silky, glistening when altered
Habit: distorted six-sided plates rare, irregular masses, fibrous
Hardness: 4
Specific gravity: 3.79
Cleavage: 3; {100} and {001} good, {010} poor
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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