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Tanteuxenite-(Y): (Y,Ce,Ca)(Ta,Nb,Ti)2(O,OH)6
Comments: Irregular fragment of tanteuxenite-(Y). Location: Liha, Maniema, Democratic Republic of Congo (Zaïre). Scale: Specimen Size 1.5 cm. © Jeff Weissman / Photographic Guide to Mineral Species
Tapiolite-(Fe): (Fe++,Mn++)(Ta,Nb)2O6 Tapiolite: (Fe,Mn)(Ta,Nb)2O6
Comments: Twinned, brown, dipyramid crystal of ferrotapiolite. Location: Sapucaia district, Galileia, Minas Gerais, Brazil. Scale: 4.2x3.1x3.1 cm. © Richard Dale / Dale Minerals
Comments: Ferrotapiolite crystal in white quartz and mica matrix. Location: Quixabá Mine, Frei Martinho, Paraíba Brazil. Scale: Crystal size 1 x 0.8 cm. © Fabre Minerals
Tapiolite-(Mn): (Mn++,Fe++)(Ta,Nb)2O6 Tapiolite: (Fe,Mn)(Ta,Nb)2O6
Comments: Black opaque resinous massive manganotapiolite. Location: Skogbole Mine, Kimito, Turku ja Pori, Finland. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Taramellite: Ba4(Fe+++,Ti,Fe++,Mg)4(B2Si8O27)O2Clx (x=0 to 1)
Comments: Dark brown crystalline taramellite. Location: Candoglia, Domo d'Ossola, Val Toce, Piedmonte, Italy. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Taramite: Na(CaNa)Fe++3AlFe+++[Si6Al2O22](OH)2
Comments: Taramite, variety mboziite, black microcrystal prisms in quartz. Location: Foyaite Dike, Mbozi Syenite-Gabbro Complex, 50 miles south of Mbeya, Mbeya, Tanzania. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Taranakite: K3Al5(HPO4)6(PO4)2·18(H2O)
Comments: Bright white chalky powdery taranakite mass. Location: South Farallon Island, near San Francicso, California, USA. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Tarapacaite: K2CrO4
Comments: Pale brown translucent tarapacaite, deliquescent granular. Location: Tarapaca, Chile. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Tarbuttite: Zn2(PO4)(OH)
Comments: Clear, prismatic crystal of tarbuttite on matrix. Location: Broken Hill Mine, Kabwe, Central Zambia. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Tarkianite: (Cu,Fe)(Re,Mo)4S8
Comments: A euhedral grain of tarkianite associated with sperrylite (Sp) in heavy-mineral concentrate. Plane-polarized light, oil immersion, sample 2_72_6. Location: Sulfide concentrate from Hitura Ni-Cu-PGE mine, Nivala, western central Finland. Scale: See Scale Bar. © Canadian Mineralogist