Formula: CaMgAl(PO4)2(OH).4H2O
Origin of name: for E. Over, Jr., American collector
Crystal system: orthorhombic
Crystal class: 2/m 2/m 2/m
Twinning:
Unit cell:
Colour: colourless to light green
Diaphaneity: transparent to translucent
Luster: vitreous
Habit: crystals platy to lath-like, minute, often in subparallel groups, massive, subparallel aggregates
Hardness: 3.5 to 4
Specific gravity: 2.53
Cleavage: 2; {010} perfect, {100} poor
Tenacity:
Streak:
Synonyms/varieties:
Comments:
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