Mourite

 IMA-GP
Uranium 5.9.4.1
(Dana Classification Number)
(No Images) 6/G.05-10
(Strunz ID)

Property Data Remarks
Named for: Its Molybdenum and Uranium content
Alternate
    Name(s):
  		•  
    Mineral Class:
    Sulfates,Chromates,Molybdates and Tungstates
      Uranylmolybdates with [UO2]+2 - [MoO4]-2
        Mourite - Moluranite series
    		 
    Chemical
        Formula:    		 U+4Mo+65O12(OH)10  
    Chemical
        Composition:
    Hydrogen: (H) 0.93%
    Molybdenum: (Mo) 44.43%
    Oxygen: (O) 32.60%
    Uranium: (U) 22.04%
    		by weight
    Molecular
        Weight:    		 1,079.80 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    3.9459 × 1004 1.07 × 10-06 0.56 55.84

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Monoclinic
    Axial Ratios: a: 3.4033
    b: 1
    c: 1.3785
    Cell Dimensions: a: 24.443 Å
    b: 7.182 Å
    c: 9.901 Å
    Z: 102.22
    b: 102.22°
    V: 1,698.73 Å3
    DenCalc: 4.22
    H-M Symbol:  
    Space Group: Pc or P 2/c
    X-Ray Diffraction:
      By Intensity ( I/Io )    		 (1): 5.897 Å
    (0.9): 12.77 Å
    (0.8): 2.871 Å
    		 
    Habit:
  • Fibrous
  • Radial clusters
  • Fan Shaped
    		•   
    Cleavage:
    [001]  
    [010]  
    [100] Good
    		 
    Fracture:    
    Moh's
        Hardness:    		 3  
    Density: 4.17 - 4.29 grams/cm3
    Color: Violet  
    Streak: Blue violet  
    Luster: Adamantine  
    Diaphaneity:    
    Pleochroism:
    (x): Pale greenish violet
    (y:) -
    (z:) Dark blue violet
    		 
    Ultra Violet
        Fluorescence:
    Long Wave:  
    Short Wave:  
    		 
    Magnetism: Non-magnetic  
    Occurance:
  		•  
    Associated
        Minerals:

    Aragonite, Autunite, Barite, Calcite, Calcurmolite, Carnotite, Coffinite, Gypsum, Ilsemannite, Iriginite, Jarosite, Marcasite, Meta-Autunite, Molybdenite, Opal (var: Opal-Agate, Wood Opal), 'Phillipsite', Phosphuranylite, Powellite, 'Psilomelane', Pyrite, Pyrolusite, Quartz (var: Amethyst, Chalcedony, Petrified Wood, Rock Crystal), Schoepite, Sedovite, Selenium, Tyuyamunite, Umohoite, Uraninite, Uranophane, Wulfenite

    Mineral   -   all of sites
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    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found with Mourite
    Locations:

    Rare

    Mourite Locations
    Notes:

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

    Crystals are probably metamic.