Schaurteite

Schaurteite


Composition: Ca3Ge(SO4)2(OH)6.3H2O
Crystal System : Hexagonal
Colours: White
Lustre : Silky
Specific Gravity (S.G) : 2.65
Year of Discovery: 1965
IMA Number: 1988 s.p.
IMA Status: Approved
Discovered By: P.G. (Gerry) Söhnge (Tsumeb geologist)
Named for: Werner T. Schaurte (German chemist)

Tsumeb is the Type Locality

Distribution

Very rare. Second oxidation zone.

Occurrence

  • Supergene
  • 2nd Oxidation Zone

Paragenetic and General Notes

Schaurteite occurs as white, silky, needle-like crystals (to 10 mm), forming fibrous aggregates in solution cavities in complex germanium sulphide ores. Under magnification it can be seen that the schaurteite always rests on a thin lining of calcite crystals within the vug.

Exceptionally, schaurteite-lined vugs to several centimetres in size have been found.  Calcite is generally the only secondary mineral associated with schaurteite.

Schaurteite is readily confused with fleischerite (and possibly with biehlite, although the latter occurs in a very different paragenesis).