Uytenbogaardtite

Sulfide mineral
(repeating unit)Ag3AuS2IMA symbolUyt[1]Strunz classification2.BA.40bCrystal systemTrigonalCrystal classDitrigonal pyramidal (3m)
H-M symbol: (3m)Space groupR3cIdentificationFormula mass584.70 g/molColorGreyish whiteCrystal habitMicroscopic crystalsFractureIrregularTenacityMalleableMohs scale hardness2LusterMetallicDiaphaneityOpaqueSpecific gravity8.405PleochroismWeakReferences[2][3][4][5][6]

The mineral uytenbogaardtite, Ag3AuS2, is a soft, greyish white sulfide mineral, occurring in hydrothermal Au-Ag-quartz veins. It occurs as tiny crystals, visible only with a microscope. It has a metallic luster and a hardness on the Mohs scale of 2 (gypsum).

It forms, together with petzite (Ag3AuTe2) and fischesserite (Ag3AuSe2) the uytenbogaardtite group. The type locality is Tambang Sawah, Bengkulu district, Sumatra island, Indonesia.

Common impurities in the uytenbogaardtite are copper, selenium, and tellurium.

It is named after the Dutch mineralogist Willem Uytenbogaardt (1918–2012), Professor of Geology, Technical University, Delft, The Netherlands, prominent ore microscopist.

See also

References

  1. ^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
  2. ^ Handbook of Mineralogy
  3. ^ Webmineral.com
  4. ^ Mindat.org
  5. ^ Barton, M. D., et al., Uytenbogaardtite a New Silver Gold Sulfide, Canadian Mineralogist, Vol. 16, pp. 651–657 (1978)
  6. ^ Mineralienatlas