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Minerals
6,131 minerals
| Mineral | Chemical formula | Crystal system | Mohs hardness | Density |
|---|---|---|---|---|
| Ullmannite | NiSbS | Cubic | — | — |
| Ulrichite | CaCu(UO₂)(PO₄)₂·4H₂O | Monoclinic | — | — |
| Ulvöspinel | Fe²⁺₂TiO₄ | Cubic | — | — |
| Umangite | Cu₃Se₂ | Tetragonal | 3.0 | 6.70 g/cm³ |
| Umbite | K₂ZrSi₃O₉·H₂O | Orthorhombic | 4.5 | — |
| Umbozerite | Na₃Sr₄ThSi₈(O,OH)₂₄ | Amorphous | — | — |
| Umbrianite | K₇Na₂Ca₂[Al₃Si₁₀O₂₉]F₂Cl₂ | Orthorhombic | — | — |
| Umohoite | (UO₂)(MoO₄)(H₂O)·H₂O | Triclinic | 2.0 | — |
| Ungavaite | Pd₄Sb₃ | Tetragonal | — | — |
| Ungemachite | K₃Na₈Fe³⁺(SO₄)₆(NO₃)₂·6H₂O | Trigonal | 2.5 | — |
| Upalite | Al(UO₂)₃(PO₄)₂O(OH)·7H₂O | Monoclinic | — | — |
| Uralborite | CaB₂O₂(OH)₄ | Monoclinic | — | — |
| Uralolite | Ca₂Be₄(PO₄)₃(OH)₃·5H₂O | Monoclinic | — | — |
| Uramarsite | (NH₄)(UO₂)(AsO₄)·3H₂O | Tetragonal | — | — |
| Uramphite | NH₄(UO₂)PO₄·3H₂O | Tetragonal | — | — |
| Urancalcarite | Ca(UO₂)₃(CO₃)(OH)₆·3H₂O | Orthorhombic | — | — |
| Uraninite | UO₂ | Cubic | — | 11.06 g/cm³ |
| Uranocircite | Ba(UO₂)₂(PO₄)₂·10H₂O | Tetragonal | — | 3.46 g/cm³ |
| Uranocircite-I | Ba(UO₂)₂(PO₄)₂·12H₂O | — | — | — |
| Uranoclite | (UO₂)₂(OH)₂Cl₂(H₂O)₄ | Monoclinic | — | — |
| Uranophane | Ca(UO₂)₂(SiO₃OH)₂·5H₂O | Monoclinic | — | — |
| Uranopilite | (UO₂)₆SO₄O₂(OH)₆·14H₂O | Triclinic | 2.0 | — |
| Uranopolycrase | (U,Y)(Ti,Nb,Ta)₂(O,OH)₆ | Orthorhombic | — | — |
| Uranosilite | (UO₂)Si₇O₁₅ | Orthorhombic | — | — |
| Uranospathite | (Al,☐)(UO₂)₂F(PO₄)₂·20H₂O | Orthorhombic | — | — |
| Uranosphaerite | Bi(UO₂)O₂(OH) | Monoclinic | — | — |
| Uranospinite | Ca(UO₂)₂(AsO₄)₂·10H₂O | Tetragonal | — | — |
| Uranotungstite | Fe(UO₂)₂(WO₄)(OH)₄·12H₂O | Orthorhombic | — | — |
| Urea | CO(NH₂)₂ | Tetragonal | — | — |
| Uricite | C₅H₄N₄O₃ | Monoclinic | — | — |
| Uroxite | [(UO₂)₂(C₂O₄)(OH)₂(H₂O)₂]·H₂O | Monoclinic | — | — |
| Urusovite | CuAlO(AsO₄) | Monoclinic | — | — |
| Urvantsevite | Pd(Bi,Pb)₂ | Tetragonal | 2.0 | 9.66 g/cm³ |
| Ushkovite | MgFe³⁺₂(PO₄)₂(OH)₂·8H₂O | Triclinic | — | — |
| Usovite | Ba₂CaMgAl₂F₁₄ | Monoclinic | — | 4.05 g/cm³ |
| Ussingite | Na₂AlSi₃O₈(OH) | Triclinic | — | 2.42 g/cm³ |
| Ustarasite | Pb(Bi,Sb)₆S₁₀ (?) | — | — | — |
| Usturite | Ca₃(SbZr)(FeO₄)₃ | Cubic | 7.0 | — |
| Utahite | MgCu²⁺₄Zn₂Te⁶⁺₃O1₄(OH)₄(H₂O)₆ | Triclinic | — | — |
| Uvanite | (UO₂)₂V⁵⁺₆O₁₇·15H₂O (?) | Orthorhombic | — | — |
| Uvarovite | Ca₃Cr₂(SiO₄)₃ | Cubic | — | 3.83 g/cm³ |
| Uvite | — | Trigonal | 7.5 | — |
| Uytenbogaardtite | Ag₃AuS₂ | Trigonal | 2.0 | — |
| Uzonite | As₄S₅ | Monoclinic | — | — |
| Vadlazarenkovite | Pd₈Bi₁.₅Te₁.₂₅As₀.₂₅ | Trigonal | — | — |
| Vaesite | NiS₂ | Cubic | — | — |
| Vajdakite | (Mo⁶⁺O₂)₂As³⁺₂O₅·3H₂O | Monoclinic | — | — |
| Vakhrushevaite | Mg₅Cr(AlSi₃O₁₀)(OH)₈ | Triclinic | — | — |
| Valentinite | Sb₂O₃ | Orthorhombic | — | — |
| Valleriite | 2[(Fe,Cu)S]·1.53[(Mg,Al)(OH)₂] | Trigonal | — | — |
| Valleyite | Ca₄Fe₆O₁₃ | Cubic | — | — |
| Vallouiseite | Ag₃Tl₂₁.₅PbSb₆₃As₄₁.₅S₁₇₀ | Triclinic | — | — |
| Vanackerite | Pb₄Cd(AsO₄)₃Cl | Trigonal | — | 7.28 g/cm³ |
| Vanadinite | Pb₅(VO₄)₃Cl | Hexagonal | 3.0 | 6.88 g/cm³ |
| 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 | — | — |
| Vanadium (native) | V | Cubic | — | — |
| 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 | — | — |
| Vanalite | NaAl₈V₁₀O₃₈·30H₂O | Monoclinic | — | — |
| Vanarsite | NaCa₁₂(H₂O)₆₄(As³⁺V⁵⁺₈.₅V⁴⁺₃.₅As⁵⁺₆O₅₁)₂·14H₂O | Monoclinic | 2.0 | — |
| Vandenbrandeite | Cu(UO₂)(OH)₄ | Triclinic | 4.0 | — |
| Vandendriesscheite | Pb₁.₆(UO₂)₁₀O₆(OH)₁₁·11H₂O | Orthorhombic | 3.0 | 5.45 g/cm³ |
| Vanderheydenite | Zn₆(PO₄)₂(SO₄)(OH)₄·7H₂O | Monoclinic | — | — |
| Vandermeerscheite | K₂[(UO₂)₂V₂O₈]·2H₂O | Monoclinic | — | — |
| Vaniniite | Ca₂Mn²⁺₃Mn³⁺₂O₂(AsO₄)₄·2H₂O | Monoclinic | — | — |
| Vanmeersscheite | U(UO₂)₃(PO₄)₂(OH)₆·4H₂O | Orthorhombic | — | — |
| Vanoxite | V₆O₁₃·8H₂O (?) | — | — | — |
| Vanpeltite | (Mo₂O₅)(S⁴⁺O₃)·4H₂O | Monoclinic | — | — |
| Vantasselite | Al₄(PO₄)₃(OH)₃·9H₂O | Orthorhombic | — | — |
| Vanthoffite | Na₆Mg(SO₄)₄ | Monoclinic | — | 2.77 g/cm³ |
| Vanuralite | Al(UO₂)₂(VO₄)₂(OH)·8.5H₂O | Monoclinic | 2.0 | — |
| Vapnikite | Ca₂CaUO₆ | Monoclinic | 5.0 | 4.93 g/cm³ |
| Varennesite | Na₈Mn₂Si₁₀O₂₅(OH,Cl)₂·12H₂O | Orthorhombic | — | — |