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Thoreaulite: Sn++Ta2O6
Comments: Yellow thoreaulite grain. Location: Ognevka Ta Deposit, Kalba Range, Shyghys Qazaqstan Oblysy (Vostochno-Kazakhstanskaya [Eastern-Kazakhstan] Oblast'), Kazakhstan. Scale: Grain size 1 mm. © Thomas Witzke / Abraxas-Verlag
Thorianite: ThO2
Comments: Thorianite penetration twin. Location: Huddersfield, Quebec, Canada. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Thorikosite: Pb3(Sb+++,As+++)O3(OH)Cl2
Comments: Yellow, prismatic crystals of Thorikosite on matrix. Location: Passa Limani Cove slag locality, Passa Limani area, Lavrion District, Attikí (Attica; Attika) Prefecture, Greece. Scale: Picture size 1.6 mm. © Thomas Witzke / Abraxas-Verlag
Thorite: ThSiO4
Comments: Several small, black cubic crystals of thorite. Location: Balangoda, Ratnapura, Sabaragamuwa province, Sri Lanka. Scale: Picture size 0.8 cm. © Paul M. Schumacher
Comments: Brown crude crystal of thorite var. uranothorite with still visible termination on both ends. Mildly radioactive. Location: Kemp Uranium Mine, Cheddar, Cardiff Township, Haliburton Co., Ontario, Canada. Scale: 15x14x13 mm. © John Betts - Fine Minerals
Thornasite: Na12Th3[Si8O19]4·18(H2O)
Comments: Opaque thornasite microcrystals. Location: DeMix-Varennes Quarry, Saint Amable Sill, Varennes, Quebec, Canada. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Thorogummite: Th(SiO4)1-x(OH)4x
Comments: Pale tan to yellowish thorogummite pseudomorphous after thorite in matrix. Location: Fort Dauphin (Tôlanaro) area, Toliara (Tuléar) Province, Madagascar. Scale: Picture size 5 mm. © Paul M. Schumacher
Comments: Yellow-tan resinous thorogummite with calcite. Location: Fort Dauphin, Toliara, Madagascar. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Thortveitite: (Sc,Y)2Si2O7
Comments: Small white prismatic crystals of thortveitite on matrix. Location: A4 highway tunnel, Thiemendorf, Königshain, Oberlausitz, Saxony, Germany. Scale: Picture size 1.7 mm. © Thomas Witzke / Abraxas-Verlag
Thorutite: (Th,U,Ca)Ti2(O,OH)6
Comments: Spherical aggregate of black thorutite. Location: Brumado, Brazil. Scale: Sphere Diameter 0.25 mm. © Jeff Weissman / Photographic Guide to Mineral Species