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Phillipsite-Na: (Na,K,Ca)1-2(Si,Al)8O16·6(H2O)
Comments: Phillipsite, variety wellsite, crystals on matrix. Location: Near Ronca, Verona, Veneto, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Phosphammite: (NH4)2HPO4
Comments: Tan opaque granular phosphammite. Location: Guanape Islands, La Libertad, Peru. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Phosphofibrite: KCuFe+++15(PO4)12(OH)12·12(H2O) Crandallite: CaAl3(PO4)2(OH)5·(H2O)
Comments: Olive-green colored fibrous phosphofibrite aggregates with white crandallite. Location: Silver Coin Mine, Humboldt County, Nevada, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Phurcalite: Ca2(UO2)3O2(PO4)2·7(H2O)
Comments: Coatings of minute acicular phurcalite crystals on sandstone. Location: Posey Mine, Red Canyon, White Canyon District, San Juan County, Utah, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Pickeringite: MgAl2(SO4)4·22(H2O)
Comments: Radiating fibrous pickeringite. Location: Patagonia, Santa Cruz County, Arizona, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Picotpaulite: TlFe2S3
Comments: SEM image of a polished secton of picotpaulite inclusions in realgar, most likely associated with lorandite as well. Location: Allchar (Alsar), Roszdan, Republic of Macedonia. Scale: Picture Size 300 µm. © Jeff Weissman / Photographic Guide to Mineral Species
Pigeonite: (Mg,Fe++,Ca)(Mg,Fe++)Si2O6
Comments: Dark green prismatic pigeonite crystals in matrix. Location: Belmont Quarry, Louden County, Virginia, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Pilsenite: Bi4Te3
Comments: Silvery metallic pilsenite veinlets in quartz. Location: Near Hope, British Columbia, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Pinakiolite: Mg2Mn+++O2(BO3)
Comments: Black submetallic platy pinakiolite crystals in white calcite. Location: Langban, Varmland, Sweden. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Pinchite: Hg++5O4Cl2 Montroydite: HgO
Comments: Minute lustrous black pinchite crystals on white montroydite. Location: Terlingua, Brewster County, Texas, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species