General Information:
Chemical Formula:
Pb2(CO3)Cl2
Composition:
(Molecular Weight = 545.31 gm)
Lead 75.99 % Pb
Carbon 2.20 % C
Chlorine 13.00 % Cl
Oxygen 8.80 % O
Empirical Formula:
Pb2(CO3)Cl2
Locality:
Tsumeb near Otavi, Niambia.
Name Origin:
From phosgene (COCl2).
Physical Properties:
Cleavage:
[110] Good, [001] Good
Color:
white, gray, brownish yellow, greenish white, or pinkish white.
Density:
6 - 6.3, Average = 6.15
Diaphaniety:
Transparent to translucent
Habits:
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline)., Tabular - Form dimensions are thin in one direction., Massive - Granular - Common texture observed in granite and o ther igneous rock.
Hardness:
2.5-3 - Finger Nail-Calcite
Luminescence:
None.
Luster:
Adamantine
Streak:
white
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