{{Infobox mineral | name = Rickardite | boxwidth = | boxbgcolor = | image = Rickardite-D10104b.jpg | imagesize = | alt = | caption = Rickardite on tellurium | category = Telluride mineral | formula = Cu<sub>7</sub>Te<sub>5</sub> | IMAsymbol = Rkd<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|journal=Mineralogical Magazine|volume=85|issue=3 |pages=291–320|doi=10.1180/mgm.2021.43 |bibcode=2021MinM...85..291W |s2cid=235729616 |doi-access=free}}</ref> | molweight = | strunz = 2.BA.30 | system = Orthorhombic | class = Dipyramidal (mmm) <br/>H-M symbol: (2/m 2/m 2/m) | symmetry = ''Pmmn'' | unit cell = | color = Red-violet (fresh), darkens | colour = | habit = | twinning = | cleavage = | fracture = | tenacity = | mohs = {{frac|3|1|2}} | luster = Metallic | streak = Red | diaphaneity = Opaque | gravity = | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = }}
'''Rickardite''' is a telluride mineral, a copper telluride (Cu<sub>7</sub>Te<sub>5</sub>)<ref name=Mindat>[http://www.mindat.org/min-3417.html Mindat]</ref> or Cu<sub>3-x (x = 0 to 0.36)</sub>Te<sub>2</sub>.<ref name=HBM>[http://rruff.geo.arizona.edu/doclib/hom/rickardite.pdf Handbook of Mineralogy]</ref> It was first described for an occurrence in the Good Hope Mine, Vulcan district, Gunnison County, Colorado, US,<ref name=Webmin>[http://www.webmineral.com/data/Rickardite.shtml Webmineral]</ref> and named for mining engineer Thomas Arthur Rickard (1864–1953).<ref name=Mindat/> It is a low temperature hydrothermal mineral that occurs associated with vulcanite, native tellurium, cameronite, petzite, sylvanite, berthierite, pyrite, arsenopyrite and bornite.<ref name=HBM/>
==See also== * List of minerals
==References== {{Reflist}} *D. M. Chizhikov and V. P. Shchastlivyi, 1966, ''Tellurium and Tellurides'', Nauka Publishing, Moscow
Category:Copper(I,II) minerals Category:Telluride minerals Category:Orthorhombic minerals Category:Minerals in space group 59 Category:Minerals described in 1903
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