Parkinsonite


Composition: (Pb,Mo)8O8Cl2
Crystal System : Tetragonal
Colours: Red, purple
Lustre : Adamantine
Hardness (H) : 2.0-2.5
Specific Gravity (S.G) : 7.32
References: Belendorff (2006)

Distribution

Extremely rare. Probably second oxidation zone (?).

Occurrence

  • Supergene
  • 2nd Oxidation Zone

Paragenetic and General Notes

Described from a single (?) specimen from an old German collection (Belendorff, 2006).  Parkinsonite occurs as indistinct, orange-red crystals or rounded, translucent aggregates of crystals (to 1 mm), on cerussite with surface alteration to hydrocerussite. Associated minerals are brucite, calcite, dolomite, and wulfenite.

Belendorff (op. cit.) proposed the following paragenetic sequence:

Cerussite (w. hydrocerussite) >> wulfenite >> dolomite >> parkinsonite >> calcite (rhombohedral) >> brucite >> sepiolite >> calcite (scalenohedral)