A–Z index
U (59)
- Uakitite VN IMA mineral species
- Uchucchacuaite AgMnPb₃Sb₅S₁₂ IMA mineral species
- Udinaite NaMg₄(VO₄)₃ IMA mineral species
- Uduminelite Ca₃Al₈(PO₄)₂O₁₂·2H₂O IMA mineral species
- Uedaite-(Ce) Mn²⁺CeAl₂Fe²⁺(Si₂O₇)(SiO₄)O(OH) IMA mineral species
- Uhligite Ca₃(Ti,Al,Zr)₉O₂₀ Mineral variety
- Uklonskovite NaMg(SO₄)F·2H₂O IMA mineral species
- Ulexite NaCaB₅O₆(OH)₆·5H₂O IMA mineral species
- Ulfanderssonite-(Ce) (Ce₁₅Ca)∑₁₆Mg₂(SiO₄)₁₀(SiO₃OH)(OH,F)₅Cl₃ IMA mineral species
- Ullmannite NiSbS IMA mineral species
- Ulrichite CaCu(UO₂)(PO₄)₂·4H₂O IMA mineral species
- Ulvöspinel Fe²⁺₂TiO₄ IMA mineral species
- UM1993-29-TeO:AuPb IMA mineral species
- Umangite Cu₃Se₂ IMA mineral species
- Umbalite Mineral variety
- Umbite K₂ZrSi₃O₉·H₂O IMA mineral species
- Umbozerite Na₃Sr₄ThSi₈(O,OH)₂₄ IMA mineral species
- Umbrianite K₇Na₂Ca₂[Al₃Si₁₀O₂₉]F₂Cl₂ IMA mineral species
- Umohoite (UO₂)(MoO₄)(H₂O)·H₂O IMA mineral species
- Unakite Rock
- Ungavaite Pd₄Sb₃ IMA mineral species
- Ungemachite K₃Na₈Fe³⁺(SO₄)₆(NO₃)₂·6H₂O IMA mineral species
- Upalite Al(UO₂)₃(PO₄)₂O(OH)·7H₂O IMA mineral species
- Uralborite CaB₂O₂(OH)₄ IMA mineral species
- Uralolite Ca₂Be₄(PO₄)₃(OH)₃·5H₂O IMA mineral species
- Uramarsite (NH₄)(UO₂)(AsO₄)·3H₂O IMA mineral species
- Uramphite NH₄(UO₂)PO₄·3H₂O IMA mineral species
- Urancalcarite Ca(UO₂)₃(CO₃)(OH)₆·3H₂O IMA mineral species
- Uraninite UO₂ IMA mineral species
- Uranium Glass Man-made glass
- Uranocircite Ba(UO₂)₂(PO₄)₂·10H₂O IMA mineral species
- Uranocircite-I Ba(UO₂)₂(PO₄)₂·12H₂O IMA mineral species
- Uranoclite (UO₂)₂(OH)₂Cl₂(H₂O)₄ IMA mineral species
- Uranophane Ca(UO₂)₂(SiO₃OH)₂·5H₂O IMA mineral species
- Uranopilite (UO₂)₆SO₄O₂(OH)₆·14H₂O IMA mineral species
- Uranopolycrase (U,Y)(Ti,Nb,Ta)₂(O,OH)₆ IMA mineral species
- Uranosilite (UO₂)Si₇O₁₅ IMA mineral species
- Uranospathite (Al,☐)(UO₂)₂F(PO₄)₂·20H₂O IMA mineral species
- Uranosphaerite Bi(UO₂)O₂(OH) IMA mineral species
- Uranospinite Ca(UO₂)₂(AsO₄)₂·10H₂O IMA mineral species
- Uranothorianite Mineral variety
- Uranotungstite Fe(UO₂)₂(WO₄)(OH)₄·12H₂O IMA mineral species
- Urea CO(NH₂)₂ IMA mineral species
- Uricite C₅H₄N₄O₃ IMA mineral species
- Uroxite [(UO₂)₂(C₂O₄)(OH)₂(H₂O)₂]·H₂O IMA mineral species
- Uruguayan Amethyst Geode Geode / nodule
- Urusovite CuAlO(AsO₄) IMA mineral species
- Urvantsevite Pd(Bi,Pb)₂ IMA mineral species
- Ushkovite MgFe³⁺₂(PO₄)₂(OH)₂·8H₂O IMA mineral species
- Usovite Ba₂CaMgAl₂F₁₄ IMA mineral species
- Ussingite Na₂AlSi₃O₈(OH) IMA mineral species
- Ustarasite Pb(Bi,Sb)₆S₁₀ (?) IMA mineral species
- Usturite Ca₃(SbZr)(FeO₄)₃ IMA mineral species
- Utahite MgCu²⁺₄Zn₂Te⁶⁺₃O1₄(OH)₄(H₂O)₆ IMA mineral species
- Uvanite (UO₂)₂V⁵⁺₆O₁₇·15H₂O (?) IMA mineral species
- Uvarovite Ca₃Cr₂(SiO₄)₃ IMA mineral species
- Uvite IMA mineral species
- Uytenbogaardtite Ag₃AuS₂ IMA mineral species
- Uzonite As₄S₅ IMA mineral species
