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Trilithionite: KLi1.5Al1.5AlSi3O10F2
Comments: Pinkish trilithionite in matrix. Location: Neuland Quarry, Döbschütz, Königshain, Oberlausitz, Saxony, Germany. Scale: Picture size 1.2 mm. © Thomas Witzke / Abraxas-Verlag
Tripuhyite: Fe++Sb+++++O4
Comments: Brown tripuhyite on matrix. Location: Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Trogerite: H2(UO2)2(AsO4)2·8(H2O) Metazeunerite: Cu(UO2)2(AsO4)2·8(H2O)
Comments: Yellow crystals of trögerite with green metazeunerite. Location: Walpurgis Flats, Weißer Hirsch Mine, Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Tschermigite: (NH4)Al(SO4)2·12(H2O)
Comments: Clear crystal of tschernichite in a vug. Location: Goble, Colombia County, Oregon, USA. Scale: Not Given. © Thomas Witzke / Abraxas-Verlag
Tucekite: Ni9Sb2S8 Ullmannite: NiSbS
Comments: Gray tucekite with ullmannite in white matrix. Location: Adler mine, Eisern, Siegerland, Nordrhein-Westfalen, Germany. Scale: Picture Size 3.5 mm. © Thomas Witzke
Tungstibite: Sb2O3·WO3
Comments: Dark olive-green spherical aggregate of tungstibite in matrix. Location: Clara Mine, Oberwolfach, Wolfach Valley, Black Forest, Baden-Württemberg, Germany. Scale: Picture size 4 mm. © Thomas Witzke / Abraxas-Verlag
Tungstite: WO3·(H2O)
Comments: Yellow tungstite. Location: San Antonio de Calacalani mine, Cercado, Oruro, Bolivia. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Turkestanite: Th(Ca,Na)2(K1-x,[ ]x)Si8O20·n(H2O)
Comments: Green, blocky, prismatic crystal of turkestanite in matrix. Location: Dara-i-Pioz Glacier, Alayskiy (Alai) Range, Tien Shan Mts, Districts of the Republican Subordination, Tajikistan. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag
Turtmannite: (Mn,Mg)25.5[(V,As)O4]3(SiO4)3[AsO3]xO5-5x(OH)20+x
Comments: Orange-brownish grains of turtmannite in matrix. Location: Pipji Glacier, Turtmanntal (Turtmann Valley), Wallis (Valais), Switzerland. Scale: Picture size 4 mm. © Thomas Witzke / Abraxas-Verlag
Tuzlaite: NaCaB508(0H)2·3(H2O)
Comments: Prismatic colorless crystals of tuzlaite. Location: Niedersachswerfen, Nordhausen, Harz Mts, Thuringia, Germany. Scale: Picture size 5 mm. © Thomas Witzke / Abraxas-Verlag