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Stützite

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(Redirected from Stuetzite) Telluride mineral
Stützite
Stützite from the Moctezuma Mine, Sonora, Mexico (size:3.7 x 3.3 x 1.7 cm)
General
CategoryTelluride mineral
Formula
(repeating unit)		Ag5−xTe3 (with x = 0.24 to 0.36)
IMA symbolStz
Strunz classification2.BA.30e
Crystal systemHexagonal
Crystal classDihexagonal dipyramidal (6/mmm)
H-M symbol: (6/m 2/m 2/m)
Space groupP6/mmm
Unit cella = 13.38, c = 8.45 ; Z = 7
Identification
ColorDark lead-gray
Crystal habitMassive, compact, granular
CleavageNone observed
FractureSubconchoidal
TenacityBrittle
Mohs scale hardness3.5
LusterMetallic
DiaphaneityOpaque
Specific gravity8.0
Alters toTarnishes rapidly to a dark bronze to iridescence
Other characteristicsAnisotrpism in polished section: Moderate, in gray reddish brown-blue
References

Stützite or stuetzite is a silver telluride mineral with formula: Ag5−xTe3 (with x = 0.24 to 0.36) or Ag7Te4.

It was first described in 1951 from a museum specimen from Sacarimb, Romania. It was named for Austrian mineralogist Andreas Xaverius Stütz (1747–1806).

It occurs with other sulfide and telluride minerals in hydrothermal ore occurrences. Associated minerals include sylvanite, hessite, altaite, petzite, empressite, native tellurium, native gold, galena, sphalerite, colusite, tennantite and pyrite.

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. ^ Mindat.org
  4. Webmineral data
  5. Mineral Atlas


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