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Tamarugite: NaAl(SO4)2·6(H2O)
Comments: Small white flakes of Tamarugite. Location: Carola Mine, Freital, near Dresden, Saxony, Germany. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Tamarugite: NaAl(SO4)2·6(H2O) Metasideronatrite: Na2Fe+++(SO4)2(OH)·(H2O)
Comments: Orange metasideronatrite with white tamarugite. Location: Willi Agatz Mine, Dresden, Saxony, Germany. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Tancoite: HNa2LiAl(PO4)2(OH)
Comments: SEM image of tabular tancoite crystals. Location: Tanco Mine, Manitoba, Canada. Scale: Field of View 1 mm. © Royal Ontario Museum
Taneyamalite: (Na,Ca)(Mn++,Mg)12[(Si,Al)6O17]2(O,OH)10
Comments: Dark brown silky fibrous taneyamalite vein in manganese ore. Location: Taneyama Mine, Toyo, Kumamoto, Japan. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Tangeite: CaCu(VO4)(OH)
Comments: Green. rosette crystalline-aggregates of tangeite on sandstone matrix. Location: Thompson, Grand County, Utah, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Tantalaeschynite-(Y): (Y,Ce,Ca)(Ta,Ti,Nb)2O6
Comments: Nearly pure fragment of tantalaeschynite-(Y). Location: Raposa Pegmatite, São José do Sabugi, Paraíba, Northeast Region, Brazil. Scale: Specimen Size 1 cm. © Jeff Weissman / Photographic Guide to Mineral Species
Tantalcarbide: TaC
Comments: Dark gray metallic tantalcarbide grains in sand. Location: Nizhnii Tagil Massif, Sverdlovsk District, Middle Urals, Russia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Tantalite-(Fe): Fe++Ta2O6
Comments: Rounded black crystal of ferrotantalite. Location: Mount Surprise, Queensland, Australia. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Comments: Blocky, crystalline aggregate of ferrotantalite crystals weighing over one kilogram. Location: Ecuador, Minas Gerais, Brazil. Scale: 10 x 6 x 5 cm. © Rob Lavinsky
Tantalite-(Mn): MnTa2O6
Comments: Floater crystal of doubly terminated, brilliant, with a little red tint manganotantalite. Location: Pech, Kunar, Afganistan. Scale: 5.5 x 7 cm. © Fabre Minerals
Tantalite-(Mn): MnTa2O6 Calciotantite: Ca(Ta,Nb)4O11
Comments: SEM image showing calciotantite (CT), manganotatntalite (MTT), microlite (MT) and lithiowodginite (LW) association. Location: Granitic pegmatites, Kalba, Kazakhstan. Scale: Scale bar 100 µm and 10 µm. © Diederik Visser