Itoite


Composition:

Pb3Ge4+(SO4)2O2(OH)2

Crystal System : Orthorhombic
Colours: White
Lustre : Silky
Specific Gravity (S.G) : 6.67
Year of Discovery: 1957
IMA Status: Approved
Named for: Tei-ichi Ito (Japanese mineralogist / chemist)

Tsumeb is the Type Locality

Distribution

Extremely rare. The type material is from the first oxidation zone, between 6 and 8 levels. However, it's status as a naturally occurring mineral at Tsumeb is doubtful.

Occurrence

  • Supergene
  • 1st Oxidation Zone

Paragenetic and General Notes

Itoite has an almost identical powder pattern to fleischerite when the latter is heated to 300 degrees C. According to the IMA itoite remains a valid species, but its validity as a naturally occurring mineral at Tsumeb is doubtful. It is probable that 'itoite' is formed from fleischerite during preparation (grinding) for analysis.