General Information:
Chemical Formula:Mn8Si6O15(OH)10
Composition:(Molecular Weight = 1,018.08 gm)Manganese 43.17 %
MnSilicon 16.55 %
SiHydrogen 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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