| Scheelite | Ca(WO4) |
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| 'Schefferite' | (Ca,Mn)(Mg,Fe,Mn)Si2O6 |
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| 'Scheteligite' | (Ca,Fe,Mn,Sb,Bi,Y)2(Ti,Ta,Nb,W)2(O,OH)7 |
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| Schizolite | NaCaMnSi3O8(OH) |
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| Scholzite | CaZn2(PO4)2 · 2H2O |
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| Schorlomite | Ca3Ti2(SiO4)(Fe3+O4)2 |
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| 'Schorlomite Group' | Ca3Z2[SiO4][TO4]2 |
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| Schröckingerite | NaCa3(UO2)(CO3)3(SO4)F · 10H2O |
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| Schüllerite | Ba2Na(Mn,Ca)(Fe3+,Mg,Fe2+)2Ti2(Si2O7)2(O,F)4 |
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| Scolecite | CaAl2Si3O10 · 3H2O |
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| Segelerite | Ca2 Mg2 Fe23+(PO4)4(OH)2 · 8H2O |
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| Segerstromite | Ca3(As5+O4)2[As3+(OH)3]2 |
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| 'Selbite' | (Ag2S, CaMg(CO3)2, Ag) |
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| 'Selenite' | CaSO4 · 2H2O |
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| Selsurtite | (H3O)12Na3(Ca3Mn3)(Na2Fe)Zr3◻{Si(Si3O9)2(Si9O27)Si9O24(OH)3}(OH)Cl(H2O) |
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| Semenovite-(Ce) | Na8Ca2FeBe6Ce2Si14O40(OH)4F4 |
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| Senkevichite | CsKNaCa2TiO[Si7O18](OH) |
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| Serendibite | Ca4[Mg6Al6]O4[Si6B3Al3O36] |
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| Sergeevite | Ca2Mg11(CO3)9(HCO3)4(OH)4 · 6H2O |
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| Sergevanite | Na15(Ca3Mn3)(Na2Fe)Zr3Si26O72(OH)3 · H2O |
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| Serpierite | Ca(Cu,Zn)4(SO4)2(OH)6 · 3H2O |
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| Sewardite | CaFe23+(AsO4)2(OH)2 |
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| Shabaite-(Nd) | Ca(Nd,Sm,Y)2(UO2)(CO3)4(OH)2 · 6H2O |
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| Sharpite | Ca(UO2)3(CO3)4 · 3H2O |
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| Sharyginite | Ca3TiFe2O8 |
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| Shasuite | CaNi3(P2O7)2 |
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| Shchurovskyite | K2CaCu6O2(AsO4)4 |
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| Sheldrickite | NaCa3(CO3)2F3 · H2O |
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| Sherwoodite | Ca5.5(AlV4+V125+O39) · 28H2O |
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| Shibkovite | K(◻K)Ca2Zn3[Si12O30] |
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| Shijiangshanite | Pb3CaAl(Si5O14)(OH)3 · 3H2O |
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| Shimazakiite | Ca2B2-xO5-3x(OH)3x (x = 0~0.06) |
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| 'Shimazakiite-4M' | Ca2B2-xO5-3x(OH)3x (x = 0~0.06) |
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| Shinichengite | Ca5[BSi2O7(OH)2]2 · 6H2O |
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| Shlykovite | KCa[Si4O9(OH)] · 3H2O |
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| Shortite | Na2Ca2(CO3)3 |
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| Shubnikovite | Ca2Cu8(AsO4)6(OH)Cl · 7H2O |
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| 'Shuiskite Subgroup' | Ca2XCr23+[Si2O6(OH)][SiO4](OH)2A |
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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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| Shulamitite | Ca3TiFe3+AlO8 |
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| Shuvalovite | K2(Ca2Na)(SO4)3F |
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| Sibirskite | Ca2(HB2O5)(OH) |
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| Sigismundite | (Ba◻)(Fe2+◻)Ca(Na2◻)Fe132+Al(PO4)11(PO3OH)(OH)2 |
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| Silesiaite | Ca4Fe23+Sn2(Si2O7)2(Si2O6OH)2 |
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| 'Silicate-titanite' | (Mg0.4Fe0.4Ca0.2)Si2O5 |
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| 'Silico-apatite' | Ca5Si3O9(OH)4 |
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| Silicocarnotite | Ca5[(SiO4)(PO4)](PO4) |
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| 'Silicomanganberzeliite' | NaCa2Mn22+(AsO4,SiO4)3 |
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| 'Silicosmirnovskite' | (Th,Ln,Ca)3(Si,P)4(O,OH)16 · 4H2O |
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