General Information:
Chemical Formula:(Mg,Fe++)7Si8O22(OH)2
Composition:(Molecular Weight = 836.02 gm)Magnesium 15.26 %
MgIron 11.69 %
FeSilicon 26.88 %
SiHydrogen 0.24 %
H Oxygen 45.93 %
O Empirical Formula: Mg5.25Fe2+1.75Si8O22(OH)2
Physical Properties: Cleavage:[110] Good
Color:brown, gray green, white, light gray, or dark green.
Density:3.13
Hardness:5-6 - Between Apatite and Orthoclase
Luster:Silky
Streak:white
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