General Information:
Chemical Formula:
Ca(Mn,Zn)2Fe+++3(PO4)4(OH)3·2(H2O)
IMA Status:
Approved IMA 1979
Physical Properties:
Cleavage:
[001] Good, [100] Good
Color:
brown, gray brown, or yellow brown.
Density:
2.6
Diaphaniety:
Transparent to Translucent
Hardness:
4.5 - Between Fluorite and Apatite
Luster:
Earthy (Dull)
Streak:
yellow white
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