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Stanfieldite: Ca4(Mg,Fe++,Mn)5(PO4)6
Comments: B&W BSE image of a fragment of stanfieldite in an epoxy grain mount. Location: Brahin Meteorite, Pallasite, Minsk, Belarus (1810). Scale: See Image. © Diederik Visser
Tadzhikite-(Ce): Ca4(Ce,Y)2(Ti,Al,Fe+++,[ ])2[Si4B4O22](OH)2
Comments: Brown crystal of tadzhikite-(Ce) with baratovite, polylithionite and zektzerite in matrix. Location: Dara-I-Pioz, Tajikistan. Scale: Specimen Size 1.5x2 cm. © Diederik Visser
Tengerite-(Y): Y2(CO3)3·2-3(H2O)
Comments: White microcrystalline tengerite-(Y) seams on matrix. Location: Evans-Lou Quarry, Quebec, Canada. Scale: Specimen Size 2x3 cm. © Diederik Visser
Tintinaite: Pb22Cu+4(Sb,Bi)30S69
Comments: Massive silvery metallic tintinaite in matrix. Location: Roznava, Slovak Republic. Scale: Specimen Size 2 x 4 cm. © Diederik Visser
Tongxinite: Cu2Zn
Comments: Tiny nugget with sorosite in a geletin capsule. Location: Newjansk, Ural, Russia. Scale: Not given. © Diederik Visser
Tounkite: (Na,Ca,K)8Al6Si6O24(SO4)2Cl·(H2O)
Comments: Light yellow-green crystalline tounkite with dark lazurite in matrix. Location: Malobystrinskoje, Baikal, Russia. Scale: Not Given. © Diederik Visser
Tsumgallite: GaO(OH)
Comments: BSE image of an irregular patch of dark tsumgallite in complex ore. Location: Tsumeb mine, Tsumeb, Namibia.. Scale: See Image. © Diederik Visser
Urvantsevite: Pd(Bi,Pb)2
Comments: Epoxy grain mount of a fragment of urvantsevite (Urv). Location: Talnakh Cu-Ni deposit, near noril'sk, Krasnoyarsk region, Russia. Scale: See Image. © Diederik Visser
Usovite: Ba2CaMgAl2F14
Comments: B&W BSE image of a fragment of usovite (Us) and fluorite (Fl) in an epoxy grain mount section. Location: Pravaya Noiba River (tributary if the Teya), northeastern Enisei Range, Krasnoyarsk region, Russia. Scale: See Image. © Diederik Visser
Vanmeersscheite: U++++++(UO2)3(PO4)2(OH)6·4(H2O) Metavanmeersscheite: U++++++(UO2)3(PO4)2(OH)6·2(H2O)
Comments: Yellow coatings of vanmeersscheite on sandstone. Unless sealed in glass, all specimens should be considered to have become metavanmeersscheite. Location: Cameron, Coconino Co., Arizona, USA. Scale: Sample Size 4 cm Glass Vial. © Diederik Visser