General Information:
Chemical Formula:
Pb2Sb2O6(O,OH)
Composition:
(Molecular Weight = 770.15 gm)
Antimony 31.62 % Sb
Hydrogen 0.03 % H
Lead 53.81 % Pb
Oxygen 14.54 % O
Empirical Formula:
Pb2Sb2O6.75(OH)0.25
Name Origin:
Named after the German chemist, J. J. Bindheim (1750-1825).
Physical Properties:
Cleavage:
None
Color:
yellow, greenish yellow, green, brownish white, or grayish white.
Density:
4.6 - 7.3, Average = 5.94
Diaphaniety:
Translucent to Opaque
Habits:
Encrustations - Forms crust-like aggregates on matrix., Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite)., Encrustations - Forms crust-like aggr egates on matrix.
Hardness:
4-5 - Fluorite-Apatite
Luminescence:
None.
Luster:
Greasy (Oily)
Streak:
light greenish brown
More details...