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Minerals
6,131 minerals
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Tincalconite | Na₂B₄O₅(OH)₄·3H₂O | Trigonal | — | — |
| Tinnunculite | C₅H₄N₄O₃·2H₂O | Monoclinic | — | — |
| Tinsleyite | KAl₂(PO₄)₂(OH)(H₂O)₂ | Monoclinic | — | — |
| Tinticite | Fe³⁺₅.₃₄(PO₄)₃.₆₂(VO₄)₀.₃₈(OH)₄·3H₂O | Triclinic | — | — |
| Tintinaite | Pb₁₀Cu₂Sb₁₆S₃₅ | Orthorhombic | — | — |
| Tinzenite | Ca₆Al₄[B₂Si₈O₃₀](OH)₂ | Triclinic | — | — |
| Tiptopite | K₂(Li,Na,Ca)₆(Be₆P₆)O₂₄(OH)₂·1.3H₂O | Hexagonal | 3.5 | — |
| Tiragalloite | Mn²⁺₄As₅+Si₃O₁₂(OH) | Monoclinic | — | — |
| Tischendorfite | Pd₈Hg₃Se₉ | Orthorhombic | — | 8.87 g/cm³ |
| Tisinalite | Na₃H₃(Mn,Ca,Fe)TiSi₆(O,OH)₁₈ * 2H₂O | Trigonal | — | — |
| Tissintite | (Ca,Na,☐)AlSi₂O₆ | Monoclinic | — | — |
| Tistarite | Ti₂O₃ | Trigonal | — | — |
| Titanite | CaTiSiO₅ | Monoclinic | 5.5 | 3.42 g/cm³ |
| Titanium (native) | Ti | Hexagonal | — | — |
| Titanoholtite | (Ti₀.₇₅☐₀.₂₅)Al₆BSi₃O₁₈ | Orthorhombic | — | — |
| Titanomaghemite | Fe(Fe,Ti)₂O₄ | Cubic | — | — |
| Titanowodginite | Mn²⁺TiTa₂O₈ | — | — | — |
| Titantaramellite | Ba₄(Ti,Fe³⁺,Fe²⁺,Mg)₄(B₂Si₈O₂₇)O₂Clx | — | — | — |
| Tivanite | V³⁺TiO₃(OH) | — | — | — |
| Tlalocite | Cu₁₀Zn₆(Te₆+O₄)₂(Te₄+O₃)(OH)₂₅Cl·27H₂O | Orthorhombic | 1.0 | — |
| Tlapallite | (Ca,Pb)₃CaCu₆[Te₄+₃Te₆+O₁₂]₂(Te₄+O₃)₂(SO₄)₂·3H₂O | Monoclinic | — | — |
| Tobelite | (NH₄,K)Al₂(AlSi₃O₁₀)(OH)₂ | — | — | — |
| Tobermorite | Ca₄Si₆O₁₇(H₂O)₂·(Ca·3H₂O | Orthorhombic | — | — |
| Tochilinite | Fe²⁺₅-₆(Mg,Fe²⁺)₅S₆(OH)₁₀ | — | — | — |
| Tocornalite | (Ag,Hg)I (?) | — | — | — |
| Todorokite | (Na,Ca,K,Ba,Sr)₁-x(Mn,Mg,Al)₆O₁₂·3-4H₂O | Monoclinic | — | — |
| Tokkoite | K₂Ca₄[Si₇O₁₈(OH)](OH,F) | — | — | — |
| Tokyoite | Ba₂Mn³⁺(VO₄)₂(OH) | Monoclinic | — | — |
| Tolbachite | CuCl₂ | Monoclinic | — | 3.26 g/cm³ |
| Toledoite | TiFeSi | Orthorhombic | — | 5.62 g/cm³ |
| Tolovkite | IrSbS | Cubic | — | 10.26 g/cm³ |
| Tomamaeite | Cu₃Pt | Cubic | — | 12.82 g/cm³ |
| Tombstoneite | — | Trigonal | — | — |
| Tomcampbellite | [KCl][Fe²⁺₁₄(OH)₆(PO₄)₆(PO₃OH)₂] | Monoclinic | — | — |
| Tomichite | V³⁺₄Ti⁴⁺₃As³⁺O₁₃(OH) | — | — | — |
| Tomiolloite | — | Hexagonal | — | — |
| Tondiite | Cu₃MgCl₂(OH)₆ | Trigonal | — | — |
| Tongbaite | Cr₃C₂ | Orthorhombic | 8.5 | 6.92 g/cm³ |
| Tongxinite | — | Cubic | 3.5 | 7.38 g/cm³ |
| Tooeleite | Fe³⁺₆(As³⁺O₃)₄(SO₄)(OH)₄·4H₂O | — | 3.0 | — |
| Topaz | Al₂SiO₄F₂ | Orthorhombic | 8.0 | 3.53 g/cm³ |
| Topsøeite | — | Tetragonal | — | — |
| Torbernite | Cu(UO₂)₂(PO₄)₂·12H₂O | Tetragonal | — | — |
| Torrecillasite | Na(As,Sb)³⁺₄O₆Cl | Orthorhombic | — | — |
| Torreyite | — | Monoclinic | — | — |
| Torryweiserite | — | Trigonal | — | — |
| 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 | — | — |
| Touretite | LiAl₄Be₄(B₁₁Be)O₂₈ | Cubic | — | — |
| Townendite | Na₈ZrSi₆O₁₈ | Trigonal | — | — |
| Toyohaite | Ag₂FeSn₃S₈ | Cubic | 4.0 | 4.94 g/cm³ |
| Trabzonite | Ca₄(Si₃O₉)(OH)₂ | Monoclinic | — | — |
| Tranquillityite | (Fe²⁺,Ca)₈(Zr,Y)₂Ti₃(SiO₄)₃O₁₂ | Hexagonal | — | — |
| Transjordanite | Ni₂P | 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) | — | — | — |
| Treasurite | Ag₇Pb₆Bi₁₅S₃₀ | Monoclinic | — | — |
| Trebiskyite | Na₃Mg₂[TiV₉O₂₈]·22H₂O | Monoclinic | — | — |
| Trechmannite | AgAsS₂ | — | — | — |
| Tredouxite | NiSb₂O₆ | Tetragonal | — | 6.61 g/cm³ |
| Trembathite | (Mg,Fe)₃(B₇O₁₃)Cl | Trigonal | — | — |
| Tremolite | ☐Ca₂Mg₅Si₈O₂₂(OH)₂ | Monoclinic | — | — |
| Trevorite | NiFe³⁺₂O₄ | Cubic | — | — |
| Triangulite | Al₃(UO₂)₄(PO₄)₄(OH)₅·5H₂O | — | — | — |
| Triazolite | NaCu₂(N₃C₂H₂)₂(NH₃)₂Cl₃·4H₂O | Orthorhombic | — | — |
| Tridymite | SiO₂ | Orthorhombic | 7.0 | 2.63 g/cm³ |
| Trigodomeykite | Cu₃As | — | — | — |
| Trigonite | Pb₃Mn²⁺(As³⁺O₃)₂(As³⁺O₂OH) | — | — | — |
| 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 |
| Triphylite | LiFe²⁺PO₄ | Orthorhombic | — | — |
| Triplite | Mn²⁺₂PO₄F | Monoclinic | — | — |
| Triploidite | (Mn²⁺,Fe²⁺)₂(PO₄)(OH) | — | — | — |
| Trippkeite | Cu²⁺As³⁺₂O₄ | Tetragonal | — | — |
| Tripuhyite | Fe³⁺Sb⁵⁺O₄ | — | — | — |
| Tristramite | (Ca,U,Fe)(PO₄,SO₄)·2H₂O | Hexagonal | — | — |