General Information:
Chemical Formula:
Mn8Si6O15(OH)10
Composition:
(Molecular Weight = 1,018.08 gm)
Manganese 43.17 % Mn
Silicon 16.55 % Si
Hydrogen 0.99 % H
Oxygen 39.29 % O
Empirical Formula:
Mn2+8Si6O15(OH)10
Environment:
Metamorphosed zinc deposit.
IMA Status:
Approved IMA 1963
Locality:
Franklin, Sussex Co., New Jersey. USA.
Physical Properties:
Cleavage:
[???] Perfect, [???] Good, [???] Good
Color:
brown, gray, yellow, yellow brown, or pink.
Density:
2.98
Diaphaniety:
Translucent to subtranslucent
Habits:
Massive - Uniformly indistinguishable crystals forming large masses., Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite),
Hardness:
6 - Orthoclase
Luminescence:
Non-fluorescent.
Luster:
Vitreous (Glassy)
Streak:
yellow white
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