Macphersonite


Composition: Pb4(SO4)(CO3)2(OH)2
Crystal System : Orthorhombic
Colours: White, pale-brown
Lustre : Adamantine, greasy
Hardness (H) : 2.5-3.0
Specific Gravity (S.G) : 6.50-6.55
References: Gebhard (1999)

Distribution

Extremely rare. Second oxidation zone.

Occurrence

  • Supergene
  • 2nd Oxidation Zone

Notable Finds

In the 1980s, three specimens of water-warn macphersonite were found "somewhere between 20 and 30 level" (Gebhard, 1999). They were initially mistaken for leadhillite. In 1995, a single well-crystallised specimen of "leadhillite" with kegelite was purchased by German collector Georg Gebhard; it turned out to be macphersonite. After the mine had closed, in 1996, a single specimen was sold as anglesite to American dealer Charlie Key, who believed it to be leadhillite. It later proved to be macphersonite (Gebhard, op.cit.).

Paragenetic and General Notes

Macphersonite is trimorphous with leadhillite and susannite.