Paul M. Schumacher's Image Gallery

Threadgoldite: Al(UO2)2(PO4)2(OH)·8(H2O)

Comments: Beige threadgoldite filling cracks in, and coating, black uraninite. Schumacher Collection.
Location: Kobokobo Pegmatite, Lusungu River District, Kivu, Congo (Zaïre). Scale: Picture size 5 mm.
© Paul M. Schumacher

Trinitite:  
Lechatelierite: SiO2

Comments: Fused silica sand (trinitite) generated by the first nuclear (fission) bomb. Although man-made and not a valid mineral, the specimen has historic value.
Location: Trinity Flats, White Sands, New Mexico. It came into existance at 5:29 a.m., July 16, 1945. Scale: Specimen size 4.1 cm.
© Paul M. Schumacher

Ulrichite: CaCu(UO2)(PO4)2·4(H2O)

Comments: Green, acicular crystals of ulrichite on matrix. Co-type specimen (?) collected by the discoverer, Anthony Fraser.
Location: Lake Boga granite quarry, Lake Boga, Victoria, Australia. Scale: Picture size 2 mm.
© Paul M. Schumacher

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

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

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

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

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

Uranophane: Ca(UO2)2SiO3(OH)2·5(H2O)

Comments: Bright yellow crystals of uranophane with black uraninite.
Location: Teofilo Otoni, Minas Gerais, Brazil. Scale: Picture size 3.5 mm.
© Paul M. Schumacher

Uranophane: Ca(UO2)2SiO3(OH)2·5(H2O)  
Uraninite: UO2

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

Uranopilite: [(UO2)6(SO4)O2(OH)6(H2O)6]·8(H2O)  
Johannite: Cu(UO2)2(SO4)2(OH)2·8(H2O)

Comments: Bright yellow rosettes of uranopilite with pale greenish yellow johannite on matrix.
Location: Apex Mine, Lander Co., Nevada, USA. Scale: Picture size 0.5 cm.
© Paul M. Schumacher

Uranopilite: [(UO2)6(SO4)O2(OH)6(H2O)6]·8(H2O)  
Johannite: Cu(UO2)2(SO4)2(OH)2·8(H2O)

Comments: Green aggregates of minute, acicular johannite and yellow uranopilite and clear, tabular aragonite crystals on matrix.
Location: Apex Mine, Lander Co., Nevada, USA. Scale: Picture size 1.5 cm.
© Paul M. Schumacher

Vandenbrandeite: Cu(UO2)(OH)4

Comments: Dark green vandenbrandeite crystal showing termination details.
Location: Musonoi Mine, Kolwezi, Western area, Shaba Cu belt, Shaba (Katanga), Congo (Zaïre). Scale: Picture size 3.5 cm.
© Paul M. Schumacher

Vanuralite: Al(UO2)2(VO4)2(OH)·11(H2O)  
Metavanuralite: Al(UO2)2(VO4)2(OH)·8(H2O)

Comments: Bright yellow crystals of metavanuralite. Unless sealed in glass, all specimens of vanuralite change to metavanuralite.
Location: Mounana mine (Mouana), Franceville, Haut-Ogooue, Gabon. Scale: See Image.
© Paul M. Schumacher

Walpurgite: Bi4(UO2)(AsO4)2O4·2(H2O)

Comments: Elongated, pale yellow, triclinic crystalline aggregate of walpurgite on calcite.
Location: Walpurgis Flacher vein, Weißer Hirsch Mine, Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany. Scale: Crystal size 1 cm.
© Paul M. Schumacher

Weeksite: K2(UO2)2Si6O15·4(H2O)

Comments: Globular masses of yellow weeksite crystals with white aragonite on a sandstone matrix.
Location: Jackpile Mine, Laguna District, Cibola County, New Mexico, USA. Scale: Picture size 1 cm.
© Paul M. Schumacher

Zeunerite: Cu(UO2)2(AsO4)2·10-16(H2O)

Comments: Thin, tabular crystals of Zeunerite on matrix.
Location: Cinovec, Erzgebirge, the Czech Republic. Scale: Picture size 0.5 cm.
© Paul M. Schumacher

Zippeite: K4(UO2)6(SO4)3(OH)10·4(H2O)

Comments: Sandstone with a 1.5 cm vein of black uraninite bisected with a 2mm vein of bright yellow zippeite.
Location: Jackpot Mine, Laguna Mining District, Cibole City, New Mexico. Scale: 4.8 cm high.
© Paul M. Schumacher

Zirkelite: (Ca,Th,Ce)Zr(Ti,Nb)2O7

Comments: Black, massive aggregate of zirkelite with minor brown biotite and a thin vein of white calcite.
Location: Palabora Open Pit mine, Loolekop, Phalaborwa, Limpopo Province, Transvaal, Republic of South Africa. Scale: Picture size 1.5 cm.
© Paul M. Schumacher