Nadorite

General Information:
 Chemical Formula:
PbSbO2Cl
 Composition:
(Molecular Weight = 396.40 gm)
Antimony 30.71 % Sb
Lead 52.27 % Pb
Chlorine 8.94 % Cl
Oxygen 8.07 % O 
 Empirical Formula:
PbSbO2Cl
Physical Properties:
 Cleavage:
[010] Perfect
 Color:
brown, brownish yellow, grayish brown, or yellow.
 Density:
7.02
 Diaphaniety:
Translucent
 Hardness:
3.5-4 - Copper Penny-Flourite
 Luster:
Adamantine - Resinous
 Streak:
yellow white
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