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Minerals
6,131 minerals
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Tennantite-(Ni) | — | Cubic | — | — |
| Tenorite | CuO | Monoclinic | 3.5 | 6.30 g/cm³ |
| Tephroite | Mn²⁺₂SiO₄ | Orthorhombic | 6.0 | — |
| Terlinguacreekite | Hg²⁺₃Cl₂O₂ | Orthorhombic | — | — |
| Terlinguaite | Hg₂OCl | Monoclinic | — | — |
| Ternesite | Ca₅(SiO₄)₂(SO₄) | Orthorhombic | — | — |
| Ternovite | MgNb₄O₁₁·8-12H₂O | Monoclinic | — | — |
| Terranovaite | (Na,Ca)₈(Si₆₈Al₁₂)O₁₆₀·~8H₂O | Orthorhombic | — | — |
| Terrywallaceite | AgPb(Sb,Bi)₃S₆ | Monoclinic | — | — |
| Terskite | Na₄ZrSi₆O₁₆·2H₂O | — | — | — |
| Tertschite | Ca₄B₁₀O₁₉·20H₂O | — | — | — |
| Teruggite | Ca₄Mg[AsB₆O₁₁(OH)₆]₂(H₂O)₁₂·2H₂O | Monoclinic | 2.5 | — |
| Teschemacherite | (NH₄)HCO₃ | Orthorhombic | 1.5 | 1.61 g/cm³ |
| Testibiopalladite | PdSbTe | Cubic | — | — |
| Tetra-auricupride | CuAu | Tetragonal | — | 14.86 g/cm³ |
| Tetradymite | Bi₂Te₂S | Trigonal | — | 7.09 g/cm³ |
| Tetraferriannite | KFe²⁺₃((Fe³⁺,Al)Si₃O₁₀)(OH)₂ | — | — | — |
| Tetraferriphlogopite | KMg₃(Fe³⁺Si₃O₁₀)(OH,F)₂ | — | — | — |
| Tetraferroplatinum | PtFe | Tetragonal | — | 14.98 g/cm³ |
| Tetrahedrite-(Cd) | Cu₆(Cu₄Cd₂)Sb₄S₁₂S | Cubic | — | — |
| Tetrahedrite-(Cu) | Cu₆(Cu₄Cu²⁺₂)Sb₄S₁₂S | — | — | — |
| Tetrahedrite-(Hg) | — | Cubic | — | — |
| Tetrahedrite-(Mn) | — | Cubic | — | — |
| Tetrahedrite-(Ni) | — | Cubic | — | — |
| Tetrarooseveltite | Bi(AsO₄) | Tetragonal | — | 7.62 g/cm³ |
| Tetrataenite | FeNi | Monoclinic | — | 8.54 g/cm³ |
| Tetrawickmanite | Mn²⁺Sn⁴⁺(OH)₆ | — | — | — |
| Tewite | K₂(Te₁.₅☐₀.₅)₂W₅O₁₉ | Orthorhombic | — | — |
| Thadeuite | CaMg₃(PO₄)₂(OH,F)₂ | Orthorhombic | — | — |
| Thalcusite | Tl₂Cu₃FeS₄ | Tetragonal | — | — |
| Thalfenisite | Tl₆(Fe,Ni,Cu)₂₅S₂₆Cl | Cubic | — | — |
| Thalhammerite | Pd₉Ag₂Bi₂S₄ | Tetragonal | — | — |
| Thalliomelane | — | Tetragonal | — | — |
| Thalliumpharmacosiderite | TlFe₄[(AsO₄)₃(OH)₄]·4H₂O | Cubic | — | — |
| Thalénite-(Y) | Y₃Si₃O₁₀F | Monoclinic | — | — |
| Thaumasite | Ca₃Si(OH)₆(SO₄)(CO₃)·12H₂O | Hexagonal | 3.5 | — |
| Thebaite-(NH4) | — | Monoclinic | — | — |
| Theisite | Cu₅Zn₅(AsO₄,SbO₄)₂(OH)₁₄ | — | — | — |
| Theoparacelsite | Cu₃(As₂O₇)(OH)₂ | Orthorhombic | — | — |
| Theophrastite | Ni(OH)₂ | Trigonal | — | — |
| Therasiaite | (NH₄)₃KNa₂Fe²⁺Fe³⁺(SO₄)₃Cl₅ | Monoclinic | — | — |
| Thermaerogenite | CuAl₂O₄ | Cubic | 7.0 | — |
| Thermessaite | K₂AlF₃(SO₄) | Orthorhombic | — | 2.80 g/cm³ |
| Thermessaite-(NH4) | (NH₄)₂AlF₃(SO₄) | Orthorhombic | — | — |
| Thermonatrite | Na₂CO₃·H₂O | Orthorhombic | — | — |
| Theuerdankite | Ag₃AsO₄ | Cubic | 2.0 | — |
| Thionasilite | Na₂Si₂S₂O₃ | Orthorhombic | — | — |
| Thomasclarkite-(Y) | (Na,Ce)(Y,REE)(HCO₃)(OH)₃·4H₂O | Monoclinic | — | — |
| Thometzekite | PbCu²⁺₂(AsO₄)₂·2H₂O | — | — | — |
| Thomsenolite | NaCaAlF₆·H₂O | Monoclinic | 2.0 | — |
| Thomsonite-Ca | NaCa₂(Al₅Si₅)O₂₀·6H₂O | Orthorhombic | — | — |
| Thomsonite-Sr | NaSr₂Al₅Si₅O₂₀·(6-7)H₂O | Orthorhombic | — | — |
| Thorasphite | Th₂H(PO₄,AsO₄)₃·6H₂O | — | — | — |
| Thorbastnäsite | ThCa(CO₃)₂F₂·3H₂O | Hexagonal | — | — |
| Thoreaulite | (Sn²⁺,Pb)(Ta,Nb)₂O₆ | — | — | — |
| Thorianite | ThO₂ | Cubic | — | 9.98 g/cm³ |
| Thorikosite | Pb₃Cl₂(OH)(SbO₃,AsO₃) | — | — | — |
| Thorite | ThSiO₄ | Tetragonal | — | 6.66 g/cm³ |
| Thornasite | Na₁₂Th₃(Si₈O₁₉)₄·(H₂O)₁₂·6H₂O | — | — | — |
| Thorneite | Pb₆(Te₂O₁₀)(CO₃)Cl₂(H₂O) | Monoclinic | — | — |
| Thorosteenstrupine | (Ca,Th,Mn)₃Si₄O₁₁F·6H₂O | Amorphous | — | — |
| Thortveitite | Sc₂Si₂O₇ | Monoclinic | — | 3.37 g/cm³ |
| Thorutite | (Th,U,Ca)Ti₂(O,OH)₆ | — | — | — |
| Threadgoldite | Al(UO₂)₂(PO₄)₂(OH)·8H₂O | — | — | — |
| Thunderbayite | TlAg₃Au₃Sb₇S₆ | Triclinic | 3.0 | 5.69 g/cm³ |
| Thénardite | Na₂SO₄ | Orthorhombic | — | 2.74 g/cm³ |
| Thérèsemagnanite | — | Hexagonal | — | — |
| Tianhuixinite | (MoO₃)₃·H₂O | — | — | — |
| Tiberiobardiite | {Cu₉Al[SiO₃(OH)]₂(OH)₁₂(H₂O)₆}(SO₄)₁.₅·10H₂O | Trigonal | — | — |
| Tiemannite | HgSe | Cubic | — | 8.31 g/cm³ |
| Tienshanite | KNa₃Na₆Ca₂Ba₆Mn₆(Ti₄+,Nb)₆B₁₂Si₃₆O₁₁₄(O,OH,F)₁₁ | Hexagonal | — | — |
| Tiettaite | (Na,K)₁₇FeTiSi₁₆O₂₉(OH)₃₀·2H₂O | Orthorhombic | — | — |
| Tikhonenkovite | SrAlF₄(OH)(H₂O)₂ | Monoclinic | — | — |
| Tilasite | CaMg(AsO₄)F | Monoclinic | — | 3.63 g/cm³ |
| Tilkerodeite | — | Trigonal | 3.0 | 9.67 g/cm³ |
| Tilleyite | Ca₅Si₂O₇(CO₃)₂ | Monoclinic | — | — |
| Tillmannsite | (Ag₃Hg)(VO₄,AsO₄) | Tetragonal | — | — |
| Timroseite | Pb₂Cu₅(TeO₆)₂(OH)₂ | Orthorhombic | — | — |
| Tin (native) | Sn | Tetragonal | — | — |
| Tinaksite | K₂Na(Ca,Mn²⁺)₂Ti[O|Si₇O₁₈(OH)] | — | — | — |