General Information:
Chemical Formula:
PbZn(VO4)(OH)
Composition:
(Molecular Weight = 404.54 gm)
Vanadium 12.59 % V
Zinc 16.16 % Zn
Hydrogen 0.25 % H
Lead 51.22 % Pb
Oxygen 19.77 % O
Empirical Formula:
PbZn(VO4)(OH)
Name Origin:
Named after the French mineralogist, Alfred Des Closzeaux (1817-1897).
Physical Properties:
Cleavage:
None
Color:
dark brownish black, dark reddish brown, orange red, reddish brown, or black.
Density:
6.1 - 6.2, Average = 6.15
Diaphaniety:
Transparent to Opaque
Habits:
Plumose - "Mica-like" minerals forming aggregates of plume-like forms., Tabular - Form dimensions are thin in one direction., Encrustations - Forms crust-like aggregates on matrix.
Hardness:
3.5 - Copper Penny
Luminescence:
None.
Luster:
Greasy (Oily)
Streak:
light brownish green
More details...