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Uramphite: (NH4)(UO2)(PO4)·3(H2O)
Comments: Thin encrustions of urampite on a fracture surface in sub-bituminous coal. Location: Tura-Kavak, Issyk-Kul'skaya Oblast', Kyrgyzstan. Scale: See Image. © Paul M. Schumacher
Urancalcarite: Ca(UO2)3(CO3)(OH)6·3(H2O)
Comments: Bright yellow earthy spots composed of micro acicular urancalcarite crystals associated with rusty browm huemulite. Location: Huemul mine, Malargue, Mendoza, Argentina. Scale: Picture size 1.5 cm. © Tom Loomis / Dakota Matrix
Uraninite: UO2
Comments: Polished slab of black "gummite" ore with the uraninite altering to various secondary uranium minerals in a brecciated matrix. Location: Ruggles mine, Graton, New Hampshire, USA. Scale: Specimen size 11.4 cm. © Paul M. Schumacher
Uraninite: UO2 Uranophane: Ca(UO2)2SiO3(OH)2·5(H2O)
Comments: Sharp, cubic crystals of black uraninite on yellow uranophane. Location: Teofilo Otoni, Minas Gerais, Brazil. Scale: Picture size 1.5 mm. © Paul M. Schumacher
Comments: Black uraninite impregnating coaly wood fragments. You can see the woody structure in detail preserved in the uraninite. Location: Grants mineral district, Westwater Canyon Member of the Morrison Formation.. Scale: Picture size 5 mm. © Paul M. Schumacher
Uranmicrolite: (U,Ca)2(Ta,Nb)2O6(OH)
Comments: lack crystals of (most probably) uranmicrolite [originallly labeled samarskite-(Y)) in purple lepidolite matrix. Location: Brown Derby Mine, Ohio City, Quartz Creek District, Gunnison Co., Colorado, USA. Scale: Specimen Side 3x3x2 cm. © John Betts - Fine Minerals
Uranocircite: Ba(UO2)2(PO4)2·12(H2O)
Comments: Yellowish green square, foliated uranocircite crystal. Location: Bergen, Falkenstein, Vogtland, Saxony, Germany. Scale: Crystal size 1.3 cm. © Tom Loomis / Dakota Matrix
Uranocircite: Ba(UO2)2(PO4)2·12(H2O) Phosphuranylite: KCa(H3O)3(UO2)7(PO4)4O4·8(H2O)
Comments: Yellow, waxy phosphuranylite with green uranocircite in matrix. Location: Bergen, Falkenstein, Vogtland, Saxony, Germany. Scale: Picture size 0.5 cm. © Paul M. Schumacher
Uranocircite: Ba(UO2)2(PO4)2·12(H2O) Metauranocircite: Ba(UO2)2(PO4)2·6-8(H2O)
Comments: Crystal fragment of uranocircite fracturing due to dehydration to meta-uranocircite. The most common are 100 and 010 fractures, with 110 close behind. But notice the 210 and 410 fractures (breaks) as well. Location: . Scale: Crystal size 2x3.5 cm. © Paul M. Schumacher
Comments: Brilliant, fluorescent yellow green crystals of uranocircite altered to meta-uranocircite. Location: Bergen, Vogtland, Saxony, Germany. Scale: 2.3 x 2.2 cm. © John Veevaert