Iranite

{{Short description|Triclinic lead copper chromate mineral}} {{For|the fossil cephalopod "Iranites"|Xenodiscidae}} {{infobox mineral | name = Iranite | image = Phoenicochroite, Iranite-235291.jpg | imagesize = 260px | alt = | caption = | category = Chromate minerals | formula = Pb₁₀Cu(CrO₄)₆(SiO₄)₂(F,OH)₂ | IMAsymbol = Irn<ref>{{Cite journal|last=Warr|first=L.N.|date=2021|title=IMA–CNMNC approved mineral symbols|url=https://www.cambridge.org/core/journals/mineralogical-magazine/article/imacnmnc-approved-mineral-symbols/62311F45ED37831D78603C6E6B25EE0A|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|url-access=subscription}}</ref> | strunz = 7.FC.15 | dana = | symmetry = Triclinic pedial<br/>H-M symbol: (1) <br/>Space group: P1 | unit cell = a = 10.02 Å, b = 9.54 Å, c = 9.89 Å; α = 104.5°, β = 66°, γ = 108.5°; Z = 1 | molweight = | color = Brown to orange | colour = | habit = Equant to flattened euhedral crystals | system = Triclinic | twinning = | cleavage = | fracture = | tenacity = | mohs = 3 | luster = Vitreous | streak = Yellow | diaphaneity = | gravity = 5.8 | density = | polish = | opticalprop = Biaxial | refractive = n_α = 2.250 – 2.300 n_γ = 2.400 – 2.500 | birefringence = δ = 0.150 – 0.200 | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | references = <ref name=HBM/><ref name=Mindat/><ref name=Webmin>[http://www.webmineral.com/data/Iranite.shtml Webmineral data for Iranite]</ref> }} '''Iranite''' (Persian: ایرانیت) is a triclinic lead copper chromate mineral with formula Pb₁₀Cu(CrO₄)₆(SiO₄)₂(F,OH)₂. It was first described from an occurrence in Iran. It is the copper analogue of hemihedrite (Pb₁₀Zn(CrO₄)₆(SiO₄)₂(F,OH)₂).<ref name=Mindat>[http://www.mindat.org/min-2040.html Mindat page for Iranite]</ref>

It occurs as an oxidation product of hydrothermal lead-bearing veins. Associated minerals include dioptase, fornacite, wulfenite, mimetite, cerussite and diaboleite.<ref name=HBM>[http://rruff.geo.arizona.edu/doclib/hom/iranite.pdf Handbook of Mineralogy]</ref> It was first described in 1970 for an occurrence in the Sebarz Mine, northeast of Anarak, Iran.<ref name=Mindat/><ref name=HBM/>

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Category:Chromate minerals