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Named for phosgene, COCl2, which is composed of elements in Phosgenite’s composition. Phosgenite is an uncommon mineral found in England, Italy, Greece, Poland, Russia, Morocco, Tunisia, Namibia, Australia, Mexico, the United States and other localities in small amounts. Phosgenite is an alteration mineral formed from the oxidation of galena in hydrothermal lead deposits, and can also be formed as a reaction between sea water and lead minerals. Can fluoresce yellow under long-wave ultraviolet light, X-rays, and electron beams.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/phosgenite.pdf

Named after the phosphorous (pho), silicon (si), and sodium, also called natrium (na), in the chemical formula. Found in only a couple localities in the Khibiny and Lovozero massifs in the Kola Peninsula, Russia, which are co-type localities of the mineral, and at Mont Saint-Hilaire in Québec, Canada. In Russia, Phosinaite occurs filling gaps in the intersections of large anorthoclase crystals in pegmatites. At the Mont Saint-Hilaire locality, the Phosinaite occurs in ussingite veinlets.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/phosinaite-(Ce).pdf

Named as the phosphorous-analogue of innelite. Phosphoinnelite is a rare mineral found only at its type locality at the Kovdor massif in the Kola Peninsula in Russia. There, it forms as “a late stage mineral in a hydrothermally altered peralkaline pegmatite that crosscuts calcite carbonatite associated with an ultramafic alkaline pluton.”
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/phosphoinnelite.pdf

Named for the phosphate in its chemical composition and for the Greek word fyllo, or phyllo, meaning “leaf,” in reference to Phosphophyllite’s perfect, leaf-like cleavage. Phosphophyllite is an uncommon mineral found as a secondary mineral in granite pegmatites, as an alteration mineral after sphalerite and iron-manganese phosphates, and in hydrothermal vein deposits. Localities for Phosphophyllite include Germany, Sweden, Bolivia, the United States, Australia, and Zambia.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/phosphophyllite.pdf

The composition of Phosphosiderite is its namesake after phosphorous and the Greek word for “iron,” sidero. Phosphosiderite can be found in small amounts at many localities including Germany, France, Portugal, Sweden, Liberia, South Africa, Mozambique, the United States including here in the Black Hills of South Dakota in the Bull Moose mine, Canada, Brazil, and Argentina. Phosphosiderite forms as “an alteration product of triphylite in zoned complex granite pegmatites” and can also be a soil constituent as well as a replacement mineral in bones and shells.
Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/phosphosiderite.pdf
Phosphovanadylite-(Ca) is the calcium analogue of Phosphovanadylite-(Ba). The mineral occurs in the Meade Peak Member of the Permian Phosphoria Formation, an organic rich, black mudstone. Associates include Sincosite and a host of other phosphates including Cacoxenite, Fluellite, Minyulite, and Wavellite. Ref. Am Min. Kampf, Nash, Loomis Jan/Feb. 2013 in print.