General Information:
Chemical Formula:
Pb(Ca,Mn++)2Si3O9
Composition:
(Molecular Weight = 523.04 gm)
Calcium 11.49 % Ca
Manganese 5.25 % Mn
Silicon 16.11 % Si
Lead 39.61 % Pb
Oxygen 27.53 % O
Empirical Formula:
PbCa1.5Mn2+0.5Si3O9
Locality:
Franklin, Sussex Co., New Jersey, USA.
Physical Properties:
Cleavage:
[???] Perfect, [???] Imperfect, [???] Imperfect
Color:
colorless or pearl white.
Density:
3.99
Diaphaniety:
Transparent
Habits:
Granular - Generally occurs as anhedral to subhedral crystals in matrix., Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Cleaveable - Easily cleaved into fragment s.
Hardness:
2.5-3 - Finger Nail-Calcite
Luminescence:
Non-fluorescent.
Luster:
Pearly
Streak:
white
More details...