General Information:
Chemical Formula:
Cr+++O(OH)
Composition:
(Molecular Weight = 85.00 gm)
Chromium 61.17 % Cr
Hydrogen 1.19 % H
Oxygen 37.64 % O
Empirical Formula:
CrO(OH)
IMA Status:
Approved IMA 1967
Physical Properties:
Color:
dark reddish brown, reddish brown, or black.
Density:
4.45 - 4.48, Average = 4.46
Diaphaniety:
Translucent to Opaque
Hardness:
5.5-6.5
Luster:
Adamantine - Metallic
Streak:
dark brown
More details...