Phoenicochroite
2+1⁄2Luster Adamantine, resinous Streak Brick-red Diaphaneity Translucent Specific gravity 5.75,[2] 7.01[3] Optical properties Biaxial (+) Refractive index nα = 2.380, nβ = 2.440, nγ = 2.650 Birefringence 0.270 (δ) 2V angle 58° (measured) Other characteristics Health risks: contains carcinogenic and mutagenic chromate ion References [4][2][3][5] 
Phoenicochroite, also known as melanochroite, is a lead chromate mineral with formula Pb2OCrO4. It forms striking orange red crystals. It was first discovered in 1839 in Beryozovskoye deposit, Urals, Russia.[2] It is named from the Greek word φοίυικος for "deep red" and χρόα for "color", in allusion to its color.[2]
References
- ^ 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.
- ^ a b c d Mindat.org Phoenicochroite on Mindat
- ^ a b Phoenicochroite in the Handbook of Mineralogy
- ^ Mineralienatlas
- ^ Phoenicochroite data on Webmin
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