| Senkevichite | CsKNaCa2TiO[Si7O18](OH) |
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| Sepiolite | Mg4(Si6O15)(OH)2 · 6H2O |
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| Serandite | NaMn22+Si3O8(OH) |
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| Sergevanite | Na15(Ca3Mn3)(Na2Fe)Zr3Si26O72(OH)3 · H2O |
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| Shafranovskite | Na3K2(Mn,Fe,Na)4[Si9(O,OH)27](OH)2 · nH2O |
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| Shattuckite | Cu5(Si2O6)2(OH)2 |
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| Shijiangshanite | Pb3CaAl(Si5O14)(OH)3 · 3H2O |
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| Shinichengite | Ca5[BSi2O7(OH)2]2 · 6H2O |
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| Shirozulite | KMn32+(Si3Al)O10(OH)2 |
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| Shkatulkalite | Na2Nb2Na3Ti(Si2O7)2O2(FO)(H2O)4(H2O)3 |
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| Shlykovite | KCa[Si4O9(OH)] · 3H2O |
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| Shuiskite-(Cr) | Ca2Cr3+Cr23+[Si2O6OH][SiO4](OH)2O |
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| Shuiskite-(Mg) | Ca2MgCr23+[Si2O6OH][SiO4](OH)2(OH) |
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| Siderophyllite | KFe22+Al(Al2Si2O10)(OH)2 |
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| Silesiaite | Ca4Fe23+Sn2(Si2O7)2(Si2O6OH)2 |
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| Silhydrite | Si3O6 · H2O |
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| Silinaite | NaLiSi2O5 · 2H2O |
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| Sitinakite | KNa2Ti4(SiO4)2O5(OH) · 4H2O |
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| Siudaite | Na8(Mn22+Na)Ca6(Fe3+,Mn2+)3Zr3NbSi24(Si,◻,Ti)O74(OH)2Cl · 5H2O |
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| Sklodowskite | Mg(UO2)2(SiO3OH)2 · 6H2O |
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| Slyudyankaite | Na28Ca4(Si24Al24O96)(SO4)6(S6)1/3(CO2) · 2H2O |
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| Soddyite | (UO2)2SiO4 · 2H2O |
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| Sonolite | Mn92+(SiO4)4(OH)2 |
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| Spadaite | MgSiO2(OH)2 · H2O (?) |
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| Sphaerobertrandite | Be3(SiO4)(OH)2 |
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| Staurolite | Fe22+Al9Si4O23(OH) |
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| Steedeite | NaMn2[Si3BO9](OH)2 |
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| Steenstrupine-(Ce) | Na14Mn22+Fe23+Ce6Zr(Si6O18)2(PO4)6(PO3OH)(OH)2 · 2H2O |
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| Stellerite | Ca4(Si28Al8)O72 · 28H2O |
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| Steudelite | Na3(K17Ca7)Ca4(Al24Si24O96)(SO3)6F6 · 4H2O |
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| Stevensite | (Ca,Na)xMg3-x(Si4O10)(OH)2 |
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| Stilbite-Ca | NaCa4(Si27Al9)O72 · 28H2O |
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| Stilbite-Na | Na9(Si27Al9)O72 · 28H2O |
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| Stilpnomelane | (K,Ca,Na)(Fe,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O |
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| Stokesite | CaSn[Si3O9] · 2H2O |
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| Stoppaniite | Be3Fe23+(Si6O18) · H2O |
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| Strakhovite | NaBa3Mn22+Mn23+Si6O19(OH)3 |
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| Strätlingite | Ca2Al2SiO7 · 8H2O |
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| Stringhamite | CaCu(SiO4) · H2O |
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| Strontio-orthojoaquinite | (Na,Fe)2Sr2Ba2Ti2[Si4O12]2O2(O,OH)2 · H2O |
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| Strontiojoaquinite | Sr2Ba2(Na,Fe)2Ti2[Si4O12]2O2(O,OH)2 · H2O |
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| Strontioruizite | Sr2Mn23+Si4O11(OH)4 · 2H2O |
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| Sudoite | Mg2Al3(Si3Al)O10)(OH)8 |
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| Suenoite | ◻Mn2Mg5Si8O22(OH)2 |
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| Suhailite | (NH4)Fe32+(AlSi3O10)(OH)2 |
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| Sulfhydrylbystrite | Na5K2Ca[Al6Si6O24](S5)2(SH) |
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| Suolunite | Ca2(H2Si2O7) · H2O |
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| Surite | (Pb,Ca)3(Al,Fe2+,Mg)2((Si,Al)4O10)(CO3)2(OH)2 |
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| Sursassite | Mn22+Al3(SiO4)(Si2O7)(OH)3 |
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| Sveinbergeite | Ca(Fe62+Fe3+)Ti2(Si4O12)2O2(OH)5(H2O)4 |
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