Yedlinite

General Information:
 Chemical Formula:
Pb6CrCl6(O,OH)8
 Composition:
(Molecular Weight = 1,637.92 gm)
Chromium 3.17 % Cr
Hydrogen 0.12 % H 
Lead 75.90 % Pb
Chlorine 12.99 % Cl
Oxygen 7.81 % O 
 Empirical Formula:
Pb6CrCl6O6(OH)2
 IMA Status:
Approved IMA 1974
Physical Properties:
 Cleavage:
[1120] Distinct
 Color:
red violet.
 Density:
5.85
 Diaphaniety:
Transparent to Translucent
 Hardness:
2.5 - Finger Nail
 Luster:
Vitreous (Glassy)
 Streak:
white
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