Wölsendorfite

 IMA-GP
Uranium 5.4.3.2
(Dana Classification Number)
(No Images) 4/H.06-40
(Strunz ID)

Property Data Remarks
Named for: The Wölsendorf District, Oberpfalz, Bavaria, Germany, its type locality
Alternate
    Name(s):
  • Woelsendorfite
    		•   
    Mineral Class: Oxides & Hydroxides -
    - Calciouranoite - Wölsendorfite series    		  
    Chemical
        Formula:    		 (Pb,Ba,Ca)U2O7 · 2H2O  
    Chemical
        Composition:
    Barium: (Ba) 5.19%
    Calcium: (Ca) 0.51%
    Hydrogen: (H) 0.51%
    Lead: (Pb) 15.67%
    Oxygen: (O) 18.14%
    Uranium: (U) 59.99%
    		by weight
    Molecular
        Weight:    		 793.61 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    1.07376 × 1005 2.90 × 10-06 1.39 138.95

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Orthorhombic
    Axial Ratios: a:b:c = 0.8541:1:0.5017
    Cell Dimensions: a = 11.95, b = 13.99, c = 7.02, Z = 6; V = 1,173.61 Den(Calc)= 6.74
    H-M Symbol:
    Space Group:
    X Ray Diffraction: By Intensity(I/Io): 3.088(1) 3.4(0.7) 1.991(0.4)
    		 
    Habit:
  • Aggregates
  • Platy
  • Veins (conversion from Uraninite)
  		•   
    Cleavage:
    [001] Good
    [010]
    [100]
    		 
    Fracture: Choncoidal (possibly due to a metamict specimen)
    Moh's
        Hardness:    		 5  
    Density: 6.8 grams/cm3
    Color: Orange-red, carmine-red  
    Streak:    
    Luster: Vitreous - Adamantine - Flinty  
    Diaphaneity: Opague  
    Pleochroism:
    (x):
    (y:)
    (z:)
    		 
    Ultra Violet
        Fluorescence:
    Long Wave:
    Short Wave:
    		 
    Magnetism: Non-magnetic  
    Occurance:
  • In fissures in fluorite with other uranium minerals
  		•   
    Associated
        Minerals:

    Autunite, Barite, Bismuth, Bornite, Calcite, Chalcocite, Chalcopyrite, Chrysocolla, Coffinite, Copper, Covellite, Cuprite, Dewindtite, Dolomite, Fluorite, Galena, Goethite, Hematite, Kasolite, Löllingite, Malachite, Phosphuranylite, Pyrite, Quartz, Safflorite, Skutterudite, Sphalerite, Torbernite, Uraninite, Uranophane, Uranophane-beta, Vandendriesscheite, Zeunerite

    Mineral   -   > 67% of sites
    Mineral   -   > 50% of sites
    Mineral   -   > 30% of sites
    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found with Wölsendorfite
    Locations:

    Somewhat rare

    Wölsendorfite Locations
    Notes:

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

    Crystals are probably metamic.