General Information:
Chemical Formula:
PbCrO4
Composition:
(Molecular Weight = 323.19 gm)
Chromium 16.09 % Cr
Lead 64.11 % Pb
Oxygen 19.80 % O
Empirical Formula:
PbCrO4
Environment:
Secondary mineral of oxidized lead veins infiltrated by Cr bearing fluids..
Locality:
Tasmania.
Name Origin:
From the Greek krokos, meaning "crocus" or "saffron."
Physical Properties:
Cleavage:
[110] Distinct, [001] Indistinct, [100] Indistinct
Color:
yellow, orange, red, or red orange.
Density:
5.9 - 6.1, Average = 6
Diaphaniety:
Translucent
Habits:
Crystalline - Coarse - Occurs as well-formed coarse sized crystals., Massive - Granular - Common texture observed in granite and other igneous rock., Acicular - Occurs as needle-like crystals.
Hardness:
2.5-3 - Finger Nail-Calcite
Luminescence:
None.
Luster:
Adamantine
Streak:
yellowish orange
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