cesbronite
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Cesbronite is a copper-meteatellurate oxysalt mineral with the chemical formula Cu3Te6+O4(OH)4 (IMA 17-C). It is colored green and its crystals are orthorhombic dipyramidal. Cesbronite is rated 3 on the Mohs Scale. It is named after Fabien Cesbron (born 1938), a French mineralogist.
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Encyclopedic overview
3 sectionsContents
- Occurrence
- See also
- References
{{Infobox mineral | name =Cesbronite | boxwidth = | boxbgcolor = | image = Cesbronite.jpg | imagesize = | alt = | caption = Emerald green crystal aggregates of cesbronite from Tombstone District, Cochise County, Arizona, USA | category = Copper-tellurium oxysalt | formula = Cu3Te6+O4(OH)4 | IMAsymbol=Ces | molweight = | strunz = 4.JN.15 | dana = 34.7.2.1 | system = Orthorhombic | class = Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) | symmetry = Pbcn | unit cell = a = 8.624, b = 11.878 c = 5.872 [Å], Z = 2 | color = Green | colour = | habit =
| twinning = | cleavage =poor on {010}, good on {021} | fracture = | tenacity =Brittle | mohs =3 | luster =Subadamantine | streak =Green | diaphaneity =Translucent | gravity =4.45 (measured) | density = | polish = | opticalprop =Biaxial (+) | refractive = | birefringence =δ = 0.149 | pleochroism =Distinct, various shades of green | 2V =72o (calculated) | dispersion = | extinction = | length fast/slow = | fluorescence =None | absorption = | melt = | fusibility = | diagnostic = | solubility =Soluble in HCl and HNO3. Insoluble in water | impurities = | alteration = | other = | prop1 = | prop1text = | references = }}
Excerpted from Wikipedia’s “cesbronite” article, available under the CC BY-SA 4.0 licence.