Ordoñezite

(repeating unit)ZnSb2O6IMA symbolOrd[1]Strunz classification4.DB.10Crystal systemTetragonalCrystal classDitetragonal dipyramidal (4/mmm)
H-M symbol: (4/m 2/m 2/m)Space groupP42/mnmUnit cella = 4.66 Å, c = 9.26 Å; Z = 2IdentificationColorVery light to very dark brown, colorless to pearl-gray, light yellowish olive to dark oliveCrystal habitPyramidal crystals in drusy or stalactitic massesTwinningCommon on {013}FractureConchoidalMohs scale hardness6.5LusterAdamantineDiaphaneitySemitransparentSpecific gravity6.635Optical propertiesUniaxial (+)Refractive indexN(calculated) = 2.02 - 2.04References[2][3][4][5]

Ordoñezite or ordóñezite is a rare tetragonal zinc antimonate mineral with chemical formula: ZnSb2O6.

Discovery

Ordóñezite was first discovered and documented by Ezequiel Ordóñez (1867-1950), a Mexican geologist, formerly director of the Geological Institute of Mexico. It was first described in 1953 for an occurrence with cassiterite in veins in rhyolite in the Santín mine which is located about eight kilometres from Santa Catarina, Guanajuato, Mexico.[3] Another locality is El Antimonio, 27 km (17 mi) southwest of Agua Prieta, Sonora, Mexico.[4]

Properties

Optical properties include: semitransparent, very light to very dark colorless to pearl-gray, light yellowish olive to dark olive.

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

External links

  • Santin mine


  • v
  • t
  • e