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Mineral Index - U

• U130
  syn. of Unnamed (Cu-Zn Arsenate Carbonate)

• U130 (of Schnorrer)
  

• U184 (of Schnorrer)
  Greenblue, tabular. Associated with theisite, tyrolite, azurite (U. Kolitsch observation).
  Cu, Zn, As, S, C, O

• U60 (of Schnorrer)
  syn. of Redgillite

• U94 (of Schnorrer)
  Pale blue, micaceous crusts. May be associated with redgillite.
  Cu-Zn-SO4-CO3

• Uchucchacuaite
  Orthorhombic
  AgMnPb₃Sb₅S₁₂

• Uddevallite
  mixture of Hematite, Ilmenite

• Udokanite
  An indequately described mineral, probably antlerite. Originally described from Udokan Mts, Transbaikalia (Zabaykalye), Eastern-Siberian Region, Russia.
  Cu₈(SO₄)₃(OH)₁₀·H₂O

• Uduminelite
  Inadequate data. Not approved by IMA CNMNC. Doubtful species. White acicular crystals in cracks in perthite. [Clark, 1993 - "Hey's Mineral Index"] Originally reported from Mt Uzumine, Fukushima Prefecture, Tohoku Region, Honshu Island, Japan.
  Ca₃Al₈(PO₄)₂O₁₂·2H₂O

• Uedait-(Ce)
  syn. of Uedaite-(Ce)

• Uedaite-(Ce)
  Monoclinic
  Mn²⁺CeAl₂Fe²⁺[O|OH|SiO₄|Si₂O₇]

• Ufertite
  syn. of Davidite

• U-Galena
  var. of Galena

• Ugandite
  syn. of Bismutotantalite

• Ugrandite
  Group name for Uvarovite, Grossular and Andradite garnets. Now includes other Calcium Garnets - Goldmanite, Hibschite, Katoite, Kimzeyite and Schorlomite.
  Ca₃X₂[SiO₄]₃

• Uhligite
  Possibly impure perovskite. Originally described from Lake Magadi, South Rift Valley, Rift Valley Province, Kenya.
  Isometric
  Ca₃(Ti,Al,Zr)₉O₂₀ ?

• Uhligite (of Cornu)
  syn. of Gelvariscite, Wavellite

• Uhligite (of Hauser)
  syn. of Perovskite

• Uhligite (of Slavik)
  syn. of Wavellite

• Uigite
  Originally reported from Uig, Trotternish, Isle of Skye, North West Highlands (Inverness-shire), Scotland, UK.

• Uintahite
  var. of Asphaltum

• Uintaite
  syn. of Uintahite

• UKI-1975-(SO:AlCu)
  Visually and chemically similar to cyanotrichite, but with different X-ray powder diffraction data (Walenta, 2001). Compare Cyanotrichite Group.
  Cu, Al, SO4, H2O

• UKI-2004-(OS:BiCuPb)
  Tiny tetragonal(?) platelets as a pseudomorph after an acicular sulphide mineral (berryite?); empirical formula Pb0.45Cu1.80Bi1.98S1O8.19; idealized Pb0.5Cu2Bi2SO8 or doubled PbCu4Bi4S2O16 (Walenta & Theye, 2004).
  Tetragonal
  PbCu₄Bi₄S₂O₁₆ (?)

• UKI-2006-(PO:AlCuFeH)
  
  Fe²⁺Al₃(PO₄)₂(OH)₂·4H₂O

• UKI-2006-(PO:FeHZn)
  
  Monoclinic
  ZnFe³⁺₂(PO₄)₂(OH)₂·4H₂O

• UKI-2008-(SiO:SrTiZr)
  Orthorhombic polymorph of rengeite. Occurs as micro domains up to 5 µm in width in monoclinic rengeite crystals.
  Orthorhombic
  Sr₄ZrTi₄[O₄|Si₂O₇]₂

• Uklonskovite
  Monoclinic
  NaMg[F|SO₄] · 2H₂O

• Uleksiitti
  syn. of Ulexite

• Uleksyt
  syn. of Ulexite

• Ulexiet
  syn. of Ulexite

• Ulexite
  Triclinic
  NaCa[B₅O₆(OH)₆] · 5H₂O
• Ullmannite
  Isometric
  NiSbS

• Ullmannite-Willyamite Series
  a series between Ullmannite and Willyamite
  Triclinic
  NiSbS - (Co,Ni)SbS

• Ulmite
  A form of humus coating grains in a black sandstone. [Clark, 1993 - "Hey's Mineral Index"]. Originally described from New South Wales, Australia.

• Ulrichite
  Monoclinic
  CaCu(UO₂)[PO₄]₂ · 4H₂O

• Ulrichite (of Birch et al.)
  syn. of Ulrichite

• Ulrichite (of Kirsch)
  syn. of Uraninite

• Ultrabasite
  syn. of Diaphorite

• Ultralite
  syn. of Sapphire

• Ultramarine
  syn. of Lazurite

• Ulvite
  syn. of Ulvöspinel

• Ulvöspinel
  Isometric
  Fe₂TiO₄

• UM1941-01-F:AlCaHMgNa
  Originally reported from Bilyukai crater, Klyuchevskiy (Klyuchevskaya) Volcano, Kamchatka Oblast', Far-Eastern Region, Russia. Also named boldyrevite but this name was never formally accepted by the IMA.
  NaCaMgAl₃F₁₄·4H₂O

• UM1965-07
  syn. of UM1965-07-E:CuSn

• UM1965-07-E:CuSn
  
  Cu₃Sn

• UM1970-18
  syn. of UM1970-18-S:As

• UM1970-18-S:As
  alpha-As4S4. Stable above 250 deg. C.
  Monoclinic
  As₄S₄

• UM1970-19
  syn. of UM1970-19-S:As

• UM1970-19-S:As
  beta-As4S4
  Monoclinic
  As₄S₄

• UM1971-22
  syn. of UM1971-22-SiO:CaClFeHMgMnNaNbZr

• UM1971-22-SiO:CaClFeHMgMnNaNbZr
  Eudialyte Group
  Trigonal
  Na₁₂Ca₅(Ce,La,Y,Ca)Zr₃(Zr,Nb)(Fe,Mn)₃[Si₉O_24-26(OH)_1-3]₂[Si₃O₉]₂Cl

• UM1974-09
  syn. of UM1974-09-S:BiCuPb

• UM1974-09-S:BiCuPb
  
  CuPbBi₇S₁₂

• UM1977-02
  syn. of UM1977-02-CO:AlCaH

• UM1977-02-CO:AlCaH
  
  Ca₃Al₂O₆(CO₃)₃·32H₂O

• UM1977-03
  syn. of UM1977-03-COSiO:CaClH

• UM1977-03-COSiO:CaClH
  
  Monoclinic
  Ca₁₀(SiO₄)(CO₃)₇(Cl,OH)₂

• UM1979-17
  syn. of UM1979-17-S:BiCuFe

• UM1979-17-S:BiCuFe
  
  Cu₁₈Fe₄BiS₁₆

• UM1980-01
  syn. of UM1980-01-E:CuZn

• UM1980-01-E:CuZn
  
  Cu₃Zn

• UM1980-02
  syn. of UM1980-02-E:CuZn

• UM1980-02-E:CuZn
  
  Cu_4.45Zn

• UM1983-09
  syn. of UM1983-09-S:BiPbTe

• UM1983-09-S:BiPbTe
  
  PbBi₃S₂Te

• UM1984-09
  syn. of UM1984-09-AsO:ClHMn

• UM1984-09-AsO:ClHMn
  related to magnussonite
  Tetragonal
  Mn₁₀As₆O₁₈(OH)Cl

• UM1985-02
  syn. of UM1985-02-E:AlZn

• UM1985-02-E:AlZn
  
  ZnAl₂

• UM1986-10
  syn. of UM1986-10-CO:ClHMgMnZn

• UM1986-10-CO:ClHMgMnZn
  
  Mg₅(Zn,Mn)₃(CO₃)₂(OH,Cl)₁₂·H₂O

• UM1987-01
  syn. of UM1987-01-CO:HMgS

• UM1987-01-CO:HMgS
  Possible dimorph of artinite.
  Monoclinic
  Mg₄(CO₃)₂(OH)₂·6H₂O ?

• UM1988-05
  syn. of UM1988-05-S:AgBiCuHgPb