Xocomecatlite

(repeating unit)Cu3(TeO4)(OH)4IMA symbolXco[1]Strunz classification7.BB.50Crystal systemOrthorhombic
Unknown space groupUnit cella = 12.14 Å, b = 14.31 Å
c = 11.66 Å; Z = 12IdentificationFormula mass450.26 g/molColorGreen, emerald greenCrystal habitAggregates of radial to spherulitic or botryoidal acicular crystalsTenacityBrittleMohs scale hardness4Streaklight greenDiaphaneityTranslucentSpecific gravity4.65Density4.42 g/cm3Optical propertiesBiaxial (−)Refractive indexnα = 1.775 nβ = 1.900 nγ = 1.920Birefringenceδ = 0.145PleochroismRich bluish greens2V angleMeasured: 41°References[2][3][4]

Xocomecatlite is a rare tellurate mineral with formula: Cu3(TeO4)(OH)4. It is an orthorhombic mineral which occurs as aggregates or spherules of green needlelike crystals.

It was first described in 1975 for an occurrence in the Oriental mine near Moctezuma, Sonora, Mexico. It has also been reported from the Centennial Eureka mine in the Tintic District, Juab County, Utah and the Emerald mine of the Tombstone District, Cochise County, Arizona in the United States. The name is derived from xocomecatl, the Nahuatl word for "bunches of grapes", and alludes to the mineral's appearance as a set of green spherules. It occurs in the oxidized zone of gold-tellurium veins in altered rhyolite. It occurs associated with other rare tellurate minerals: parakhinite, dugganite, tlapallite, mcalpineite, leisingite, jensenite; the sulfate–phosphate minerals: hinsdalite–svanbergite; and the oxide goethite.[3][4]

References

Wikimedia Commons has media related to Xocomecatlite.
  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. ^ Xocomecatlite Mineral Data on Webmineral
  3. ^ a b Handbook of Mineralogy
  4. ^ a b Mindat.org
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Selenites, selenates, tellurites, and tellurates
Selenites 28.1
Ahlfeldite Chalcomenite Clinochalcomenite Cobaltomenite Demesmaekerite Derriksite Francisite Guilleminite Haynesite Mandarinoite Marthozite Molybdomenite Sofiite
Selenates 28.2
Olsacherite Schmiederite
Tellurites 28.3
Balyakinite Blakeite Cesbronite Chekhovichite Choloalite Cliffordite Denningite Emmonsite Eztlite Fairbankite Graemite Keystoneite Kinichilite Mackayite Moctezumite Mroseite Plumbotellurite Poughite Quetzalcoatlite Rajite Rodalquilarite Schmitterite Smirnite Sonoraite Spiroffite Teineite Winstanleyite Zemannite
Tellurates 28.4
Carlfriesite Cheremnykhite Cuzticite Dugganite Girdite Khinite Khinite-3T Kuksite Kuranakhite Montanite Oboyerite Schieffelinite Tlalocite Tlapallite Xocomecatlite Yafsoanite Yecoraite


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