Metacalciouranoite

 IMA-A 1971-054
Uranium 5.4.3.1
(Dana Classification Number)
(No Images) 4/H.06-20
(Strunz ID)

Property Data Remarks
Named for:  
Alternate
    Name(s):
  		•  
    Mineral Class:
    Oxides
      Uranyl ([UO2]2+) hydroxides and hydrates
        Calciouranoite - Wölsendorfite series
    		 
    Chemical
        Formula:    		 (Ca,Na,Ba)U2O7 · 2H2O  
    Chemical
        Composition:
    Barium: (Ba) 3.82%
    Calcium: (Ca) 2.23%
    Hydrogen: (H) 0.48%
    Lead: (Pb) 2.88%
    Oxygen: (O) 20.04%
    Sodium: (Na) 0.96%
    Uranium: (U) 69.58%
    		by weight
    Molecular
        Weight:    		 718.40 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    1.24548 × 1005 3.37 × 10-06 1.62 162.47

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Orthorhombic
    Axial Ratios: a:  
    b:  
    c:  
    Cell Dimensions: a:   Å
    b:   Å
    c:   Å
    Z:  
    a:   °
    b:   °
    g:   °
    V:   Å3
    DenCalc:  
    H-M Symbol:  
    Space Group:  
    X-Ray Diffraction:
      By Intensity ( I/Io )    		 (1): 3.09 Å
    (0.67): 1.676 Å
    (0.67): 1.283 Å
    (0.6): 3.43 Å
    (0.4): 1.94 Å
    (0.4): 1.99 Å
    (0.3): 1.73 Å
    (0.3): 1.92 Å
    		 
    Habit:
  • Aggregates
    		•   
    Cleavage:
    [001]  
    [010]  
    [100]  
    		 
    Fracture:    
    Moh's
        Hardness:    		    
    Density: 4.9 grams/cm3
    Color: Orange  
    Streak:    
    Luster:    
    Diaphaneity:    
    Pleochroism:
    (x):  
    (y:)  
    (z:)  
    		 
    Ultra Violet
        Fluorescence:
    Long Wave:  
    Short Wave:  
    		 
    Magnetism: Non-magnetic  
    Occurance:
  • Oxidation zone of Uranium-Molybdenum deposit
    		•   
    Associated
        Minerals:

    Bauranoite, Calciouranoite, Uraninite

    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found with Metacalciouranoite
    Locations:

    Extremely rare

    Metacalciouranoite Locations
    Notes:

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

    Crystals are probably metamic.