| Swamboite-(Nd) | Nd0.333[(UO2)(SiO3OH)](H2O)~2.5 |
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| Swinefordite | Li(Al,Li,Mg)3((Si,Al)4O10)2(OH,F)4 · nH2O |
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| Sørensenite | Na4SnBe2Si6O16(OH)4 |
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| Tacharanite | Ca12Al2Si18O33 (OH)36 |
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| Tadzhikite-(Ce) | Ca4Ce23+Ti◻2(B4Si4O22)(OH)2 |
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| Taikanite | Sr3BaMn22+(Si4O12)O2 |
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| Tainiolite | KLiMg2(Si4O10)F2 |
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| Taipingite-(CeCa) | (Ce7Ca2)◻Mg(SiO4)3[SiO3(OH)]4F3 |
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| Talc | Mg3Si4O10(OH)2 |
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| Tamaite | (Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112 · 21H2O |
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| Taneyamalite | (Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44 |
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| Taniajacoite | SrCaMn23+Si4O11(OH)4 · 2H2O |
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| Tanohataite | LiMn2Si3O8(OH) |
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| Taramellite | Ba4(Fe3+,Ti,Fe2+,Mg)4(B2Si8O27)O2Clx |
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| Taramite | Na(CaNa)(Mg3Al2)(Al2Si6O22)(OH)2 |
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| Tarbagataite | (K◻)Ca(Fe2+,Mn)7Ti2(Si4O12)2O2(OH)5 |
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| Taseqite | Na12Sr3Ca6Fe3Zr3Nb[(Si3O9)2(Si9O27)2SiO]Cl2(O,OH,H2O)3 |
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| Tazzoliite | Ba4-xNaxTi2Nb3SiO17[PO2(OH)2]x(OH)(1-2x) |
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| Telyushenkoite | (Cs,Na,K)Na6[Be2Al3Si15O39]F2 |
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| Tephroite | Mn22+SiO4 |
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| Ternesite | Ca5(SiO4)2(SO4) |
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| Terranovaite | (Na,Ca)8(Si68Al12)O160 · 29H2O |
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| Terskite | Na4ZrSi6O16 · 2H2O |
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| Tetraferriannite | KFe32+(Si3Fe3+)O10(OH)2 |
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| Tetraferriphlogopite | KMg3(Fe3+Si3O10)(OH,F)2 |
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| Thalénite-(Y) | Y3Si3O10F |
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| Thaumasite | Ca3(SO4)[Si(OH)6](CO3) · 12H2O |
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| Thomsonite-Ca | NaCa2[Al5Si5O20] · 6H2O |
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| Thomsonite-Sr | Na(Sr,Ca)2[Al5Si5O20] · 7H2O |
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| Thorite | Th(SiO4) |
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| Thornasite | (Na,K)12Th3[Si8O19]4 · 18H2O |
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| Thorosteenstrupine | (Ca,Th,Mn)3Si4O11F · 6H2O |
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| Thortveitite | Sc2Si2O7 |
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| Tiberiobardiite | {Cu9Al[SiO3(OH)]2(OH)12(H2O)6}(SO4)1.5 · 10H2O |
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| Tienshanite | KNa3Na6Ca2Ba6Mn6(Ti4+,Nb)6B12Si36O114(O,OH,F)11 |
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| Tiettaite | K4Na12Fe3+Si16O41(OH)4 · 2H2O |
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| Tilleyite | Ca5(Si2O7)(CO3)2 |
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| Tinaksite | K2Na(Ca,Mn2+)2TiO[Si7O18(OH)] |
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| Tinzenite | Ca2Mn42+Al4[B2Si8O30](OH)2 |
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| Tiragalloite | Mn42+As5+Si3O12(OH) |
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| Tisinalite | Na3H3(Mn,Ca,Fe)TiSi6(O,OH)18 · 2H2O |
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| Tissintite | (Ca,Na,◻)AlSi2O6 |
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| Titanite | CaTi(SiO4)O |
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| Titanoholtite | (Ti0.75◻0.25)Al6BSi3O18 |
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| Titantaramellite | Ba4(Ti,Fe3+,Fe2+,Mg)4(B2Si8O27)O2Clx |
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| Tobelite | (NH4,K)Al2(AlSi3O10)(OH)2 |
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| Tobermorite | Ca4Si6O17(H2O)2 · (Ca · 3H2O) |
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| Tokkoite | K2Ca4[Si7O18(OH)](OH,F) |
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| Toledoite | TiFeSi |
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| Topaz | Al2(SiO4)(F,OH)2 |
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