| Shuiskite-(Mg) | Ca2MgCr23+[Si2O6OH][SiO4](OH)2(OH) |
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| 'Silicate-titanite' | (Mg0.4Fe0.4Ca0.2)Si2O5 |
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| Sklodowskite | Mg(UO2)2(SiO3OH)2 · 6H2O |
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| Skogbyite | Zr(Mg2Mn43+)SiO12 |
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| 'Skolite' | H4K(Mg,Fe2+,Ca)(Al,Fe3+)3Si6O20 · 4H2O |
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| 'Smaragdite' | Ca2(Mg,Fe2+,Cr)5Si8O22(OH)2 |
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| 'Sobotkite' | (K,Ca0.5)0.33(Mg0.66Al0.33)3(Si3Al)O10(OH)2 · 1-5H2O |
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| 'Soda-Dravite' | NaMg3B3Al6Si6O27(OH)4 |
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| 'Soda-Glauconite' | (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2 |
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| 'Sodic-anthophyllite' | {Na}{Mg2}{Mg5}(AlSi7O22)(OH)2 |
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| Spadaite | MgSiO2(OH)2 · H2O (?) |
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| 'Spodiophyllite' | (Na,K)4(Mg,Fe2+)3(Fe3+,Al)2(Si8O24) |
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| 'Star Kornerupine' | Mg3Al6(Si,Al,B)5O21(OH) |
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| 'Steatite' | Mg3(Si4O10)(OH)2 |
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| Stevensite | (Ca,Na)xMg3-x(Si4O10)(OH)2 |
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| Stilpnomelane | (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O |
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| 'Strigovite (of Tschermak)' | (Mg,Fe)2Al2Si2O7(OH)4 |
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| 'Strontium-bearing Potassic-richterite' | K[(Ca,Sr)Na][Mg5]Si8O22(OH)2 |
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| Sudoite | Mg2Al3(Si3Al)O10)(OH)8 |
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| Suenoite | ◻Mn2Mg5Si8O22(OH)2 |
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| Surinamite | (Mg,Fe)3Al4BeSi3O16 |
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| Surite | (Pb,Ca)3(Al,Fe2+,Mg)2((Si,Al)4O10)(CO3)2(OH)2 |
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| Sverigeite | NaMnMgSnBe2(SiO4)3(OH) |
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| Swinefordite | Li(Al,Li,Mg)3((Si,Al)4O10)2(OH,F)4 · nH2O |
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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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| Taneyamalite | (Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44 |
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| 'Tanzanion' | (Mg,Co)2SiO4 |
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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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| 'Tetraferrinontronite' | Mg0.20Fe3+3.80[(Si6.98Al0.15Fe3+0.87)O20](OH)4Ca0.45Mg0.15Na0.02 |
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| Tetraferriphlogopite | KMg3(Fe3+Si3O10)(OH,F)2 |
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| 'Thuringite' | (Fe,Fe,Mg,Al)6(Si,Al)4O10(O,OH)8 |
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| 'Tibiscumite' | (Ca,Na,K)0.7(Al,Fe,Mg)2(Si,Al)4O10(OH)2 · 0.8H2O |
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| 'Titanclinohumite' | (Mg,Ti)9(SiO4)4(OH,F)2 |
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| 'Titanium- and Potassium-bearing Richterite' | {Na}{NaCa}{Mg5}(Si8O22)(OH)2 |
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| 'Titanium-bearing Augite' | (Ca,Na)(Mg,Ti, Fe,Al,)(Si,Al)2O6 |
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| 'Titanium-bearing Diopside' | Ca(Mg,Fe2+,Ti4+)(Si,Al)2O6 |
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| 'Titanium-bearing Omphacite' | (NaaCabFec2+Mgd)(AleFef3+Tig4+Feh2+Mgj)Si2O6 |
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| 'Titanium-bearing Pyrope' | Mg3(Al,Ti)2Si3O12 |
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| Titantaramellite | Ba4(Ti,Fe3+,Fe2+,Mg)4(B2Si8O27)O2Clx |
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| Tosudite | Na0.5(Al,Mg)6((Si,Al)8O18)(OH)12 · 5H2O |
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| Traskite | Ba21Ca(Fe2+,Mn,Ti)4(Ti,Fe,Mg)12(Si12O36)(Si2O7)6(O,OH)30Cl6 · 14H2O |
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| Trattnerite | ◻(◻)2Fe23+Mg3[Si12O30] |
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| 'Traversellite' | CaMgSi2O6 |
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| Tremolite | ◻Ca2Mg5(Si8O22)(OH)2 |
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| 'Tremolite Root Name Group' | ◻Ca2(Mg4.5-5M2+0-0.5)Si8O22W2 |
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| Tschermakite | ◻(Ca2)(Mg3Al2)(Al2Si6O22)(OH)2 |
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| Tululite | Ca14(Fe3+,Al)(Al,Zn,Fe3+,Si,P,Mn,Mg)15O36 |
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