Seligmannite

(repeating unit)PbCuAsS3IMA symbolSeli[1]Strunz classification2.GA.50Crystal systemOrthorhombicCrystal classDipyramidal (mmm)
H-M symbol: (2/m 2/m 2/m)Space groupPmmnIdentificationFormula mass441.87 g/molColorLead gray to blackCrystal habitMassive to crystallineTwinningOn {110} very commonCleavageIndistinct on the {001}, {100}, and {010}FractureConchoidalTenacityBrittleMohs scale hardness3LusterMetallicStreakBlack to chocolate brownDensity5.38 – 5.44 g/cm3Optical propertiesAnisotropicReferences[2][3]

Seligmanite is a rare mineral, with the chemical formula PbCuAsS3. Originally described from the Lengenbach Quarry, Valais Canton, Switzerland; it has also been found in the Raura district, Lima Region, Peru; at Tsumeb, Oshikoto Region, Namibia; and at the Sterling Mine, Sussex County, New Jersey, US.

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. ^ Seligmannite: Seligmannite mineral information and data
  3. ^ Seligmannite Mineral Data


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