Ordoñezite Explained

Ordóñezite
Category:Antimonate mineral
Formula:ZnSb2O6
Imasymbol:Ord[1]
Strunz:4.DB.10
System:Tetragonal
Class:Ditetragonal dipyramidal (4/mmm)
H-M symbol: (4/m 2/m 2/m)
Symmetry:P42/mnm
Unit Cell:a = 4.66 Å, c = 9.26 Å; Z = 2
Color:Very light to very dark brown, colorless to pearl-gray, light yellowish olive to dark olive
Habit:Pyramidal crystals in drusy or stalactitic masses
Twinning:Common on
Fracture:Conchoidal
Mohs:6.5
Luster:Adamantine
Diaphaneity:Semitransparent
Gravity:6.635
Opticalprop:Uniaxial (+)
Refractive:N(calculated) = 2.02 - 2.04
References:[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, 27km (17miles) 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.

External links

Notes and References

  1. Warr. L.N.. 2021. IMA–CNMNC approved mineral symbols. Mineralogical Magazine. 85. 3 . 291–320. 10.1180/mgm.2021.43 . 2021MinM...85..291W . 235729616 . free.
  2. https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Ordo%F1ezite Mineralienatlas
  3. http://www.mindat.org/min-3014.html Mindat.org
  4. http://rruff.geo.arizona.edu/doclib/hom/ordonezite.pdf Handbook of Mineralogy
  5. http://www.webmineral.com/data/Ordonezite.shtml Webmineral data