General Information:
Chemical Formula:
Mn7(SiO4)3(OH)2
Composition:
(Molecular Weight = 694.83 gm)
Manganese 55.35 % Mn
Silicon 12.13 % Si
Hydrogen 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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