General Information:
Chemical Formula:Mn7(SiO4)3(OH)2
Composition:(Molecular Weight = 694.83 gm)Manganese 55.35 %
MnSilicon 12.13 %
SiHydrogen 0.29 %
H Oxygen 32.24 %
O Empirical Formula: Mn2+7(SiO4)3(OH)2
Locality:Franklin, Sussex Co., New Jersey.
Physical Properties: Cleavage:[001] Indistinct
Color:brown, brown, violet red, light red, or dark pink.
Density:3.8
Diaphaniety:Transparent to translucent
Habits:Striated - Parallel lines on crystal surface or cleavage face., Massive - Uniformly indistinguishable crystals forming large masses.,
Hardness:5.5-6 - Knife Blade-Orthoclase
Luminescence:Non-fluorescent.
Luster:Vitreous (Glassy)
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