General Umohoite Information![]() [(UO2)MoO4]•H2O |
![]() Molecular Weight = 447.98 gm |
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Uranium 53.13 % U 60.28 % UO2 |
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Molybdenum 21.42 % Mo 32.13 % MoO3 |
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Hydrogen 0.45 % H 4.02 % H2O |
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Oxygen 25.00 % O |
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100.00 % 96.43 % = TOTAL OXIDE |
![]() (UO2)(MoO4)•(H2O) |
![]() Secondary U and Mo deposits. |
![]() Valid Species (Pre-IMA) 1953 |
![]() Freedom No. 2 mine, Marysvale, Piute County, Utah. Link to MinDat.org Location Data. |
![]() Named for the composition of U, Mo, H. |
![]() Umohoite |
![]() | | Umohoite Image
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Umohoite Crystallography![]() a:b:c =0.8467:1:1.9429 |
![]() a = 6.3748, b = 7.5287, c = 14.628, Z = 4; alpha = 82.64°, beta = 85.95°, gamma = 89.91° V = 694.53 Den(Calc)= 4.28 |
![]() Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1 |
![]() By Intensity(I/Io): 4.13(1), 3.2(0.5), 3.15(0.4), |
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Mouse
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| Physical Properties of Umohoite![]() None |
![]() Bluish black, Dark green, Black. |
![]() 4.55 - 4.93, Average = 4.74 |
![]() Opaque |
![]() Platy - Sheet forms (e.g. micas). |
![]() Rosette - Bundled tabular aggregates resembling rose flower petals. |
![]() Tabular - Form dimensions are thin in one direction. |
![]() 2 - Gypsum |
![]() Sub Metallic |
![]() blue gray |
| Optical Properties of Umohoite![]() CI meas= -0.127 (Poor) - where the CI = (1-KPDmeas/KC) |
CI calc= -0.248 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1874,KPDmeas= 0.1692,KC= 0.1501 Ncalc = 1.64 - 1.74 ![]() Biaxial (-), a=1.66, b=1.831, g=1.915, bire=0.2550, 2V(Calc)=64, 2V(Meas)=65. |
![]() dark blue. |
![]() light blue. |
![]() olive green. |
| Calculated Properties of Umohoite![]() Bulk Density (Electron Density)=4.06 gm/cc |
note: Specific Gravity of Umohoite =4.74 gm/cc. ![]() Fermion Index = 0.05 |
Boson Index = 0.95 ![]() PEUmohoite =1,444.54 barns/electron |
U=PEUmohoite x relectron=5,869.21 barns/cc. ![]() |
GRapi = 3,882,185.43 (Gamma Ray American Petroleum Institute Units)
Umohoite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram. Estimated Maximum U.S. Postal Shipping Size
(10 mRem/hr limit, Unshielded 10 cm box)
7.83 ± 1.96 grams of pure Umohoite .
Weight of pure Umohoite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.74 gm/cc.* | Umohoite Classification![]() 49.02.02.01 (49)Basic and Hydrated Molybdates and Tungstates |
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(49.02)(Hydrated) |
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(49.02.02)Dana Group |
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![]() 04.GC.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.G - Uranyl Hydroxides |
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04.GC -With additional cations; with UO2(O,OH)6 hexagonal polyhedra |
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| Other Umohoite Information![]() NAME( Dana8) PHYS. PROP.(AmMin, v 86, p 379) OPTIC PROP.(Dana8) |
![]() Links to other databases for Umohoite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - MinDAT 11 - Mineralienatlas (Deutsch) 12 - Online Mineral Museum 13 - QUT Mineral Atlas 14 - Ruff.Info 15 - Uranium Minerals Search for Umohoite using: Visit our Advertisers for Umohoite : A Bijoux Google Search for UmohoiteAdam's Minerals Google Search for Umohoite Cape Minerals Google Search for Umohoite Dakota Matrix Minerals Google Search for Umohoite Excalibur Mineral Corp. Google Search for Umohoite Exceptional Minerals Google Search for Umohoite John Betts Fine Minerals Search for Umohoite McDougall Minerals Google Search for Umohoite Mineral News Website Link Rock and Mineral Shows Google Search for Umohoite Weinrich Minerals, Inc. Google Search for Umohoite Ask about Umohoite here : Print or Cut-and-Paste your Umohoite Specimen Label here :
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