General Information:
Chemical Formula:
Pb8Mn(Si2O7)3
Composition:
(Molecular Weight = 2,217.04 gm)
Manganese 2.48 % Mn
Silicon 7.60 % Si
Lead 74.77 % Pb
Oxygen 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
More details...