Uranotungstite

 IMA-A 1984-005
Uranium 49.3.5.1
(Dana Classification Number)
(No Images) 6/G.07-10
(Strunz ID)

Property Data Remarks
Named for: Its Uranium and Tungsten content
Alternate
    Name(s):
  		•  
    Mineral Class: Sulphates, Chromates, Molybdates -
    - Uranotungstite series    		  
    Chemical
        Formula:    		 (Fe+2,Ba,Pb)(UO2)2WO4(OH)4 · 12H2O  
    Chemical
        Composition:
    Barium: (Ba) 3.53%
    Hydrogen: (H) 2.42%
    Iron: (Fe) 2.87%
    Lead: (Pb) 1.77%
    Oxygen: (O) 32.89%
    Tungsten: (W) 15.75%
    Uranium: (U) 40.77%
    		by weight
    Molecular
        Weight:    		 1,167.54 daltons (amu)
    Specific
        Radioactivity:

    (All radiation is for a 1 gram, fully aged specimen)

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    7.2986 × 1004 1.97 × 10-06 1.02 101.51

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Orthorhombic
    Axial Ratios: a:b:c = 0.6676:1:0.5191
    Cell Dimensions: a = 9.22, b = 13.81, c = 7.17, Z = 2; V = 912.94 Den(Calc) = 4.25
    H-M Symbol:
    Space Group: P2221, Pccm, Pmc21, Pcc2, Pmm
    X Ray Diffraction: By Intensity(I/Io): 6.96(1) 3.21(0.7) 4.6(0.6)
    		 
    Habit:
  • Microscopic Crystals
  		•   
    Cleavage:
    [001]
    [010] Perfect
    [100]
    		 
    Fracture: Irregular  
    Moh's
        Hardness:    		 2  
    Density: 4.27 grams/cm3
    Color: Yellow, Yellow-orange, Orange, Brownish  
    Streak: Yellow  
    Luster: Earthy  
    Diaphaneity: Translucent  
    Pleochroism:
    (x): Colorless
    (y:) Yellow
    (z:) Yellow
    		 
    Ultra Violet
        Fluorescence:    		 Non-fluorescent  
    Magnetism: Non-magnetic  
    Occurance:
  		•  
    Associated
        Minerals:

    Agardite-(Ce), Arsenopyrite, Barite, Barium-Pharmacosiderite, Bassetite, Becquerelite, Billietite, Bismuth, Bornite, Brochantite, Cacoxenite, Calcite, Chalcocite, Chalcopyrite, Chrysocolla, Covellite, Digenite, Dolomite, Fluorite, Galena, Goethite, Gorceixite, Gypsum var: Selenite, Hematite, Ianthinite, Idaite, Kasolite, Langite, Lepidocrocite, Luzonite, Löllingite, Malachite, Marcasite, Meta-Autunite, Metatorbernite, Metazeunerite, Naumannite, Nontronite, Novácekite, Proustite, Pyrite, Pyrolusite, Pyrrhotite, Safflorite, Schoepite, Segnitite, Selenium, Silver, Spionkopite, Studtite, Tennantite, Torbernite, Umangite, Uraninite, Uranophane, Yarrowite, Zeunerite, Zippeite

    Mineral   -   both of the sites
    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found with Uranotungstite
    Locations:

    Very rare

    Uranotungstite Locations
    Notes:

    Very radioactive a- and b-particles, g-rays.

    Crystals are probably metamic.