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Picropharmacolite: Ca4Mg(AsO3OH)2(AsO4)2·11(H2O)
Comments: White, acicular crystalline sprays of picropharmacolite on matrix. Location: Wechsel Schacht, Richelsdorf, Hesse, Germany. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Comments: Snow white acicular, radial spray of picropharmacolite with pink sainfeldite. Location: Wilhelm Mine, Richelsdorf District, Hesse, Germany. Scale: Cluster size 6 mm. © Tom Loomis / Dakota Matrix
Piemontite: Ca2(Al,Mn,Fe)3(SiO4)3(OH) = Ca2(Mn,Fe)Al2(SiO4)(Si2O7)O(OH)
Comments: Red, acicular crystalline aggregates of piemontite. Location: N'Chwaning mine, Kuruman, Nothern Cape, South Africa. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Piemontite-(Sr): (Ca,Mn++)(Sr,Ca)Mn+++(Al,Mn+++,Fe+++)2(SiO4)(Si2O7)O(OH)
Comments: Carmine red crystals of piemontite-(Sr) found on quartz. Location: Graveglia, Piemont, Italy. Scale: See Image. © Rruff Database
Piergorite-(Ce): Ca8Ce2(Al0.5 Fe+++0.5)([ ],Li,Be)2Si6B8O36(OH,F)2
Comments: B&W image of a group of platy-elongated crystals of piergorite-(Ce) on matrix. Location: Tre Croci locality, Vetralla, Viterbo province, Italy. Scale: Crystal Length 400 µm. © American Mineralogist
Pierrotite: Tl2Sb6As4S16
Comments: Orange-red micro crystals of pierrotite to 0.2 mm.. Location: Jas Roux, Hautes-Alpes, Provence-Alpes-Côte d'Azur, France. Scale: Sample Size 1x2 cm. © Tom Loomis / Dakota Matrix
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
Pillaite: Pb9Sb10S23ClO0.5
Comments: Scanning electron microscope image of acicular pillaite fibers. (Eur. J. Mineral, 13:606). Location: Buca della Vena mine in the Apuan Alps, northern Tuscany, Italy. Scale: See Image. © Eur. J. Mineral
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
Pinalite: Pb3(WO4)OCl2
Comments: Yellow needles of pinalite from 0.2 to 0.5mm in rose quartz and blue caledonite. Location: Tiger, Pinal County, Arizona, USA. Scale: Picture size 5 mm. © Tom Loomis / Dakota Matrix
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
Pinnoite: MgB2O4·3(H2O) Inderite: MgB3O3(OH)5·5(H2O)
Comments: Pale green translucent crystalline pinnoite on chalky white inderite. Location: Lake Inder, Atyrau, Kazakhstan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Pintadoite: Ca2V2O7·9(H2O)
Comments: Dark green to lighter green pintadoite coatings on sandstone. Location: Deremo-Snyder Mine, San Miguel County, Colorado, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Pirssonite: Na2Ca(CO3)2·2(H2O)
Comments: Almost transparent platy pirssonite crystal. Location: Searles Lake, San Bernardino County, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Pitiglianoite: Na6K2Si6Al6O24(SO4)·2(H2O)
Comments: Colorless, prismatic crystals of pitiglianoite. Location: Monte Cavallucio, Sacrofano, Campagnano, Lazio, Italy. Scale: Picture size 2.5 mm. © Thomas Witzke / Abraxas-Verlag
Pitticite: Hydrous ferric arsenate sulfate (Fe, AsO4, SO4, H2O)
Comments: Dark brown to orange-brown massive Pitticite. Location: Graul, Schwarzenberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 6 mm. © Thomas Witzke / Abraxas-Verlag
Piypite: K2Cu2(SO4)2O
Comments: Green, acicular piypite crystals on matrix. Location: Main Fracture Eruption (1975-1976) Tolbachik Volcano, Kamchatka, Russia. Scale: Picture Size 1 cm. © Diederik Visser
Pizgrischite: (Cu,Fe)Cu14PbBi17S35
Comments: Pizgrischite crystals spray partially altered into malachite (green) and bismutite (yellow) in a fine-grained quartz matrix. (CanMin, v45:1229). Location: Piz Grisch Mountain, Val Ferrera, Graubünden, Switzerland. Scale: Picture size 4 cm. © Canadian Mineralogist
Comments: SEM images of twinned pizgrischite crystals extracted from quartz matrix by treatment with dilute hydrofluoric acid. (CanMin, v45:1229). Location: Piz Grisch Mountain, Val Ferrera, Graubünden, Switzerland. Scale: See Image. © S. Ansermet/Canadian Mineralogist