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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