General Information:
Chemical Formula:
Pb20(SiO4)7(SO4)4Cl4
Composition:
(Molecular Weight = 5,314.65 gm)
Silicon 3.70 % Si
Lead 77.97 % Pb
Sulfur 2.41 % S
Chlorine 2.67 % Cl
Oxygen 13.25 % O
Empirical Formula:
Pb20(SiO4)7(SO4)4Cl4
IMA Status:
Approved IMA
Physical Properties:
Cleavage:
[???] Indistinct
Color:
colorless or white.
Diaphaniety:
Transparent to Translucent
Hardness:
3.5-4.5
Luster:
Adamantine
Streak:
white
More details...