General Information:
Chemical Formula:Pb8Mn(Si2O7)3
Composition:(Molecular Weight = 2,217.04 gm)Manganese 2.48 %
MnSilicon 7.60 %
SiLead 74.77 %
PbOxygen 15.15 %
O Empirical Formula: Pb8Mn2+3(Si2O7)
Locality:Franklin, Sussex Co., New Jersey, USA.
Physical Properties: Cleavage:[???] Perfect
Color:white or gray.
Density:6.11 - 6.72, Average = 6.41
Diaphaniety:Transparent to translucent
Habits:Massive - Lamellar - Distinctly foliated fine-grained forms., ,
Hardness:3 - Calcite
Luminescence:Non-fluorescent.
Luster:Adamantine
Streak:white
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