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Minerals containing silicon
1,605 minerals
Silicon — element
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Tobermorite | Ca₄Si₆O₁₇(H₂O)₂·(Ca·3H₂O | Orthorhombic | — | — |
| Tokkoite | K₂Ca₄[Si₇O₁₈(OH)](OH,F) | — | — | — |
| Toledoite | TiFeSi | Orthorhombic | — | 5.62 g/cm³ |
| Topaz | Al₂SiO₄F₂ | Orthorhombic | 8.0 | 3.53 g/cm³ |
| Tosudite | Na₀.₅(Al,Mg)₆((Si,Al)₈O₁₈)(OH)₁₂·5H₂O | — | — | — |
| Toturite | Ca₃Sn₂(SiFe³⁺₂)O₁₂ | Cubic | — | — |
| Tounkite | (Na,Ca,K)₈(Al₆Si₆O₂₄)(SO₄)₂Cl·0.5H₂O | Hexagonal | — | — |
| Townendite | Na₈ZrSi₆O₁₈ | Trigonal | — | — |
| Trabzonite | Ca₄(Si₃O₉)(OH)₂ | Monoclinic | — | — |
| Tranquillityite | (Fe²⁺,Ca)₈(Zr,Y)₂Ti₃(SiO₄)₃O₁₂ | Hexagonal | — | — |
| Traskite | Ba₂₁Ca(Fe²⁺,Mn,Ti)₄(Ti,Fe,Mg)₁₂(Si₁₂O₃₆)(Si₂O₇)₆(O,OH)₃₀Cl₆·14H₂O | Hexagonal | — | — |
| Trattnerite | ☐(Fe³⁺,Mg,Fe²⁺)₂(Mg,Fe²⁺,Fe³⁺)₃(Si₁₂O₃₀) | — | — | — |
| Tremolite | ☐Ca₂Mg₅Si₈O₂₂(OH)₂ | Monoclinic | — | — |
| Tridymite | SiO₂ | Orthorhombic | 7.0 | 2.63 g/cm³ |
| Trikalsilite | K₂NaAl₃(SiO₄)₃ | Hexagonal | — | — |
| Trilithionite | K(Li₁.₅Al₁.₅)(AlSi₃O₁₀)(F,OH)₂ | — | — | — |
| Trimerite | CaBe₃Mn²⁺₂(SiO₄)₃ | Monoclinic | — | — |
| Trimounsite-(Y) | Y₂Ti₂(SiO₄)O₅ | Monoclinic | — | — |
| Trinepheline | NaAlSiO₄ | Hexagonal | — | 2.58 g/cm³ |
| Tritomite-(Ce) | Ce₅(SiO₄,BO₄)₃(OH,O) | — | — | — |
| Tritomite-(Y) | Y₅(SiO₄,BO₄)₃(O,OH,F) | — | — | — |
| Truscottite | (Ca,Mn)₁₄Si₂₄O₅₈(OH)₈·2H₂O | — | — | — |
| Tsangpoite | Ca₅(PO₄)₂(SiO₄) | Hexagonal | — | — |
| Tsaregorodtsevite | (N(CH₃)₄)(AlSi₅O₁₂) | Orthorhombic | — | — |
| Tschermakite | ☐Ca₂(Mg₃Al₂)Si₆Al₂O₂₂(OH)₂ | Monoclinic | 5.5 | — |
| Tschernichite | CaAl₂Si₆O₁₆·8H₂O | Tetragonal | — | — |
| Tschörtnerite | Ca₄(K,Ca,Sr,Ba)₃Cu₃Al₁₂Si₁₂O₄₈(OH)₈·20H₂O | Cubic | — | — |
| Tsepinite-Ca | (Ca,K,Na)₂₋ₓ(Ti,Nb)₂(Si₄O₁₂)(OH,O)₂·4H₂O | — | — | — |
| Tsepinite-K | (K,Ba,Na)₂(Ti,Nb)₂(Si₄O₁₂)(OH,O)₂·3H₂O | — | — | — |
| Tsepinite-Na | (Na,H₃O,K,Sr,Ba,☐)₂(Ti,Nb)₂(Si₄O₁₂)(OH,O)₂·3H₂O | — | — | — |
| Tsepinite-Sr | (Sr,Ba,K)(Ti,Nb)₂(Si₄O₁₂)(OH,O)₂·3H₂O | Monoclinic | — | — |
| Tsilaisite | NaMn²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH) | Trigonal | 7.0 | — |
| Tugtupite | Na₄BeAlSi₄O₁₂Cl | Tetragonal | 4.0 | 2.46 g/cm³ |
| Tuhualite | NaFe²⁺Fe³⁺Si₆O₁₅ | — | — | — |
| Tululite | Ca₁₄(Fe³⁺,Al)(Al,Zn,Fe³⁺,Si,P,Mn,Mg)₁₅O₃₆ | Cubic | — | — |
| Tumchaite | Na₂Zr(Si₄O₁₁)·2H₂O | Monoclinic | — | — |
| Tundrite-(Ce) | Na₂Ce₂TiO₂(SiO₄)(CO₃)₂ | Triclinic | 3.0 | — |
| Tundrite-(Nd) | Na₂Nd₂TiO₂(SiO₄)(CO₃)₂ | — | — | — |
| Tungusite | Ca₄Fe₂Si₆O₁₅(OH)₆ | — | — | — |
| Tuperssuatsiaite | Na₂Fe₃Si₈O₂₀(OH)₂·4H₂O | Monoclinic | — | — |
| Turkestanite | (K,☐)(Ca,Na)₂ThSi₈O₂₀·nH₂O | Tetragonal | — | — |
| Turtmannite | (Mn,Mg)₂₂.₅Mg₃-₃x((V₅+,As₅+)O₄)₃(As³⁺O₃)x(SiO₄)₃O₅-₅x(OH)₂₀+x | — | — | — |
| Tuscanite | (K(Ca,Na)₆(Si,Al)₁₀O₂₂[SO₄,CO₃,(OH)₂])·H₂O | — | — | — |
| Tvedalite | (Ca,Mn)₄Be₃Si₆O₁₇(OH)₄·3H₂O | — | — | — |
| Tweddillite | CaSr(Mn³⁺₂Al)[Si₂O₇][SiO₄]O(OH) | Monoclinic | — | — |
| Törnebohmite-(Ce) | Ce₂Al(SiO₄)₂(OH) | Monoclinic | — | — |
| Törnebohmite-(La) | La₂Al(SiO₄)₂(OH) | — | — | — |
| Uedaite-(Ce) | Mn²⁺CeAl₂Fe²⁺(Si₂O₇)(SiO₄)O(OH) | Monoclinic | — | — |
| Ulfanderssonite-(Ce) | (Ce₁₅Ca)∑₁₆Mg₂(SiO₄)₁₀(SiO₃OH)(OH,F)₅Cl₃ | Monoclinic | — | — |
| Umbite | K₂ZrSi₃O₉·H₂O | Orthorhombic | 4.5 | — |
| Umbozerite | Na₃Sr₄ThSi₈(O,OH)₂₄ | Amorphous | — | — |
| Umbrianite | K₇Na₂Ca₂[Al₃Si₁₀O₂₉]F₂Cl₂ | Orthorhombic | — | — |
| Uranophane | Ca(UO₂)₂(SiO₃OH)₂·5H₂O | Monoclinic | — | — |
| Uranosilite | (UO₂)Si₇O₁₅ | Orthorhombic | — | — |
| Ussingite | Na₂AlSi₃O₈(OH) | Triclinic | — | 2.42 g/cm³ |
| Uvarovite | Ca₃Cr₂(SiO₄)₃ | Cubic | — | 3.83 g/cm³ |
| Vakhrushevaite | Mg₅Cr(AlSi₃O₁₀)(OH)₈ | Triclinic | — | — |
| Vanadio-oxy-chromium-dravite | NaV₃(Cr₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O | Trigonal | 7.5 | — |
| Vanadio-oxy-dravite | NaV₃(Al₄Mg₂)(Si₆O₁₈)(BO₃)₃(OH)₃O | Trigonal | 7.5 | — |
| Vanadio-pargasite | NaCa₂(Mg³⁺₄V)(Si₆Al₂)O₂₂(OH)₂ | Monoclinic | — | — |
| Vanadiocarpholite | Mn²⁺V³⁺AlSi₂O₆(OH)₄ | Orthorhombic | — | — |
| Vanadoakasakaite-(Ce) | CaCe(V³⁺AlMn²⁺)O[Si₂O₇][SiO₄](OH) | Monoclinic | — | — |
| Vanadoakasakaite-(La) | (CaLa)(V³⁺AlMn²⁺)O[Si₂O₇][SiO₄](OH) | Monoclinic | — | — |
| Vanadoallanite-(La) | CaLa³⁺V³⁺AlFe²⁺(Si₂O₇)(SiO₄)O(OH) | Monoclinic | — | — |
| Vanadoandrosite-(Ce) | MnCe(V³⁺AlMn²⁺)[Si₂O₇][SiO₄]O(OH) | Monoclinic | — | — |
| Vanadoandrosite-(La) | Mn²⁺La(V³⁺AlMn²⁺)(Si₂O₇)(SiO₄)O(OH) | Monoclinic | — | — |
| Vanadomalayaite | CaVO(SiO₄) | Monoclinic | — | — |
| Varennesite | Na₈Mn₂Si₁₀O₂₅(OH,Cl)₂·12H₂O | Orthorhombic | — | — |
| Veblenite | K₂☐₂Na(Fe²⁺₅Fe³⁺₄Mn₇☐)Nb₃Ti(Si₂O₇)₂(Si₈O₂₂)₂O₆(OH)₁₀(H₂O)₃ | Triclinic | — | — |
| Vermiculite | Mg₀.₇(Mg,Fe,Al)₆(Si,Al)₈O₂₀(OH)₄ * 8H₂O | Monoclinic | 1.3 | 2.55 g/cm³ |
| Verplanckite | Ba₂(Mn,Fe,Ti)Si₂O₆(O,OH,Cl,F)₂ * 3H₂O or near | — | — | — |
| Vertumnite | Ca₄Al₄Si₄O₆(OH)₂₄ * 3H₂O | Monoclinic | — | — |
| Vesuvianite | (Ca,Na)₁₉(Al,Mg,Fe)₁₃(SiO₄)₁₀(Si₂O₇)₄(OH,F,O)₁₀ | Tetragonal | 6.5 | — |
| Vicanite-(Ce) | (Ca,Ce,La,Th)₁₅As₅+(As³⁺₀.₅,Na₀.₅)Fe³⁺Si₆B₄O₄₀F₇ | — | — | — |
| Vielleaureite-(Ce) | (Mn²⁺Ce)(MgAlMn²⁺)F[Si₂O₇][SiO₄](OH) | Monoclinic | — | — |
| Vigrishinite | Zn₂Ti₄₋ₓ(Si₂O₇)₂O₂(OH,F,O)₂(H₂O,OH,☐)₄ (x<1) | Triclinic | — | — |
| Vinogradovite | Na₄Ti₄(Si₂O₆)₂[(Si,Al)₄O₁₀]O₄ * (H₂O,Na,K)₃ | Monoclinic | — | — |
| Virgilite | LiAlSi₂O₆ | Monoclinic | — | — |
| Vishnevite | Na₈(Al₆Si₆)O₂₄(SO₄)·2H₂O | Hexagonal | — | — |
| Vistepite | SnMn₄B₂Si₄O₁₆(OH)₂ | Triclinic | — | 3.59 g/cm³ |