Zeunerite

(repeating unit)Cu(UO2)2(AsO4)2·(10-16)H2OIMA symbolZeu[1]Strunz classification8.EB.05Dana classification40.02a.14.01Crystal systemTetragonalCrystal classDitetragonal dipyramidal (4/mmm)
H-M symbol: (4/m 2/m 2/m)Space groupP4/nncIdentificationColorYellow-green, emerald-greenCrystal habitCrystals flat tabular on {001}, commonly subparallel to micaceousCleavage{001} perfect, {100}, distinctMohs scale hardness2.5LusterVitreousStreakpale greenDiaphaneityTransparent, becoming translucent on dehydrationSpecific gravity3.2–3.4Optical propertiesUniaxial (−)Refractive indexnω = 1.610 – 1.613 nε = 1.582 – 1.585Birefringenceδ = 0.028PleochroismVisibleOther characteristics RadioactiveReferences[2][3][4]

Zeunerite is a green copper uranium arsenate mineral with formula Cu(UO2)2(AsO4)2·(10-16)H2O. It is a member of the autunite group. The associated mineral metazeunerite is a dehydration product of zeunerite.

Zeunerite occurs as a secondary mineral in the oxidized weathering zone of hydrothermal uranium ore deposits which contain arsenic. Olivenite, mansfieldite, scorodite, azurite and malachite are found in association with zeunerite.[2]

It was first described in 1872 for an occurrence in the Schneeberg District, Ore Mountains, Saxony, Germany. It was named for Gustav Anton Zeuner (1828–1907).[3]

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. ^ a b Handbook of Mineralogy
  3. ^ a b Mindat
  4. ^ Webmineral data


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