Vandendriesscheite

 IMA-GP
Uranium 5.8.1.1
(Dana Classification Number)
(No Images) 4/H.07-20
(Strunz ID)
Unless sealed in glass, all specimens should be considered to have become Metavandendriesscheite within a few months of being exposed to ambient air.

Property Data Remarks
Named for: Adrien Vandendriessche (1914-1940), Belgian mineralogist and geologist
Alternate
    Name(s):
  		•  
    Mineral Class: Oxides & Hydroxides -
    - Fourmarierite - Masuyite series    		  
    Chemical
        Formula:    		 PbU+67O22 · 12H2O  
    Chemical
        Composition:
    Hydrogen: (H) 0.95%
    Lead: (Pb) 9.44%
    Oxygen: (O) 21.86%
    Uranium: (U) 67.76%
    		by weight
    Molecular
        Weight:    		 3,513.04 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    1.21283 × 1005 3.28 × 10-06 1.59 158.71

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Orthorhombic - Dipyramidal
    Axial Ratios: a:b:c = 0.3411:1:0.3512
    Cell Dimensions: a = 14.1165, b = 41.378, c = 14.5347, Z = 8; V = 8,489.90 Den(Calc) = 5.50
    H-M Symbol: 2/m 2/m 2/m
    Space Group: Pbca
    X Ray Diffraction: By Intensity(I/Io): 3.61(1) 7.25(1) 3.17(0.75)
    		Vandendriesscheite
    Crystal
    Habit:
  		•  
    Cleavage:
    [001] Perfect
    [010]
    [100]
    		 
    Fracture:    
    Moh's
        Hardness:    		 3  
    Density: 4.54 grams/cm3
    Color: Yellow-orange  
    Streak:    
    Luster: Adamantine  
    Diaphaneity: Transparent to Translucent  
    Pleochroism:
    (x):
    (y:)
    (z:)
    		 
    Ultra Violet
        Fluorescence:
    Long Wave:
    Short Wave:
    		 
    Magnetism: Non-magnetic  
    Occurance:
  • Orange-red oxidic zone of alteration "gummite" zone of uraninite
  		•   
    Associated
        Minerals:

    Anatase, Arsenopyrite, Arsenuranospathite, Autunite, Barite, Becquerelite, Billietite, Bismuth, Bismuthinite, Bornite, Brochantite, Calcite, Chalcocite, Chalcopyrite, Chrysocolla, Copper, Covellite, Cuprite, Dolomite, Erythrite, Fluorapatite, Fluorite, Fourmarierite, Galena, Goethite, Hematite, Kasolite, Langite, Lavendulan, Löllingite, Malachite, Meta-Autunite, Metatorbernite, Metazeunerite, Mixite, Muscovite, Novácekite, Phosphuranylite, Pyrite, Pyrolusite, Quartz, Rutherfordine, Rutile, Schoepite, Silver, Sphalerite, Tennantite, Torbernite, Uraninite, Uranophane, Uranophane-beta, Uranospinite, Wolsendorfite, Xenotime-(Y), Zeunerite

    Mineral   -   > 70% of sites
    Mineral   -   > 50% of sites
    Mineral   -   > 25% of sites
    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found with Vandendriesscheite
    Locations:

    Somewhat rare

    Vandendriesscheite Locations
    Notes:

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

    Crystals are probably metamic.