General Information:
Chemical Formula:
(Pb,Mo,[ ])8O8Cl2
Composition:
(Molecular Weight = 1,633.98 gm)
Molybdenum 11.74 % Mo
Lead 76.08 % Pb
Chlorine 4.34 % Cl
Oxygen 7.83 % O
Empirical Formula:
Pb6Mo2O8Cl2
Environment:
In fractures and vugs in carbonates associated with Fe, Mn oxides.
IMA Status:
Approved IMA
Locality:
Merehead Quarry, Cranmore, Somerset, England.
Name Origin:
Named after Reginald F. D. Parkinson, English mineral collector from Somerset.
Physical Properties:
Cleavage:
[001] Perfect, [100] Good
Color:
carmine red or purple red.
Density:
7.32
Diaphaniety:
Translucent
Habits:
Platy - Sheet forms (e.g. micas)., ,
Hardness:
2-2.5 - Gypsum-Finger Nail
Luminescence:
Non-fluorescent.
Luster:
Adamantine
Streak:
dark red
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