Argutite

(repeating unit)GeO2IMA symbolAgt[1]Strunz classification4.DB.05Dana classification04.04.01.07Crystal systemTetragonal
Ditetragonal dipyramidal classSpace groupTetragonal
H–M Symbol: (4/m 2/m 2/m)
Space group: P42/mnmUnit cella = 4.3975, c = 2.8625 [Å]; Z = 2IdentificationFormula mass104.61ColorGrayish black, light gray in reflected lightCrystal habitSubhedral crystals, as inclusions in sphaleriteTwinningOccasionally twinned on {101}Mohs scale hardness6-7LusterVitreous - adamantineDiaphaneityTransparent to opaqueSpecific gravity6.28 calculatedOptical propertiesUniaxial (+)Refractive index2.01References[2][3][4]

Argutite (GeO2) is a rare germanium oxide mineral. It is a member of the rutile group.

It was first described for an occurrence in the Argut deposit, central Pyrenees, Haute-Garonne, France in 1983.[3][4] The type locality is within a zinc ore deposit within lower Paleozoic sedimentary rocks that have undergone metamorphism. Associated minerals include sphalerite, cassiterite, siderite and briartite.[4]

See also

  • Earth sciences portal

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. ^ Webmineral
  3. ^ a b Mindat.org
  4. ^ a b c Handbook of Mineralogy


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