General Information:
Chemical Formula:Ca4Mn+++3-x(BO3)3(CO3)(O,OH)3
Composition:(Molecular Weight = 582.85 gm)Calcium 27.51 %
CaManganese 23.56 %
MnBoron 5.56 %
B Hydrogen 0.13 %
H Carbon 2.06 %
C Oxygen 41.18 %
O Empirical Formula: Ca4Mn3+2.5(BO3)3(CO3)O2.25(OH)0.75
IMA Status:Approved IMA 1964
Physical Properties: Cleavage:None
Color:black.
Density:3.35 - 3.5, Average = 3.42
Diaphaniety:Subopaque
Hardness:6 - Orthoclase
Luster:Adamantine - Resinous
Streak:brown
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