Vanuranylite

 IMA-A
Uranium 40.2a.30.1
(Dana Classification Number)
(No Images) 7/E.11-70
(Strunz ID)

Property Data Remarks
Named for: Its Vanadium, Uranium and Aluminum content
Alternate
    Name(s):
  		•  
    Mineral Class:
    Phosphates, Arsenates and Vanadates
      Uranylphosphates and uranylvanadates with:
    [UO2]2+ - [PO4 | AsO4]3- and [UO2]2+ - [V2O8]6-,
    uranyl-group vanadates with [UO2]2+ - [V2O8]6-
        Tyuyamunite series
    		 
    Chemical
        Formula:    		 (H3O,Ba,Ca,K)1.6(UO2)2V2O8 · 4H2O  
    Chemical
        Composition:
    Aluminum: (Al) 2.62%
    Hydrogen: (H) 2.15%
    Oxygen: (O) 36.81%
    Uranium: (U) 48.53%
    Vanadium: (V) 9.89%
    		by weight
    Molecular
        Weight:    		 1,030.09 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    9.5222 × 1004 2.57 × 10-06 1.30 130.40

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Monoclinic - Prismatic
    Axial Ratios: a:b:c = 1.2532:1:2.4133
    Cell Dimensions: a = 10.49, b = 8.37, c = 20.2, Z = 4; beta = 90° V = 1,773.59 Den(Calc)= 3.86
    H-M Symbol: 2/m
    Space Group: C2/c (?)
    X Ray Diffraction: By Intensity(I/Io): 3.23(1) 5(1) 2.11(0.8)
    		 
    Habit:
  • Encrustations
  • Platy
  • Pseudo Hexagonal
    		•   
    Cleavage:
    [001]
    [010]
    [100] Perfect
    		 
    Fracture:    
    Moh's
        Hardness:    		 2  
    Density: 3.6 grams/cm3
    Color: Deep yellow  
    Streak: Light yellow  
    Luster:    
    Diaphaneity:    
    Pleochroism:
    (x): Pale yellow
    (y:) Yellow
    (z:) Yellow
    		 
    Ultra Violet
        Fluorescence:
    Long Wave:
    Short Wave:
    		 
    Magnetism: Non-magnetic  
    Occurance:
  • In the oxidation zone of a lead-bearing Uranium-Vanadium deposit in sandstone
  		•   
    Associated
        Minerals:

    'Aegirine-augite', Afghanite, Allanite-(Ce), Analcime, Anatase, Andradite, Anorthite, Asbecasite, Augite, Baddeleyite, 'Barite', Betafite, Biotite, Calciobetafite, Calcite, Cancrinite, Ciprianiite, Clinohumite, Corundum, Cristobalite, Cryptomelane, Danburite, Davyne, Diopside, Ekanite, Epidote, 'Ferrierite', Ferrohornblende, Fluorapatite, Fluorite, Forsterite, Gadolinite-(Ce), Goethite, Grossular, Gypsum, Haüyne, 'Hellandite', Helvite, Hematite, 'Heulandite', 'Kennedyite', Leucite, Magnetite, Molybdenite, Monazite-(Ce), Nepheline, Nosean, Osumilite-(Mg), Peprossiite-(Ce), Perovskite, 'Phillipsite', Phlogopite, Pseudobrookite, Pyrite, Pyrope, Quartz, Rutile, Sanidine, 'Scapolite', Scheelite, Sodalite, Spinel, 'Stilbite', Stillwellite-(Ce), Stoppaniite, Thorite, Titanite, 'Tourmaline Group', Tridymite, Uraninite, Uranpyrochlore, Vesuvianite, Vicanite-(Ce), Vonsenite, Zircon, Zirconolite, var: Melanite, var: Uranothorite

    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found with Vanuranylite
    Locations:

    Extremely rare

  • Mounana uranium mine, Franceville, Gabon (type locale)
    		•
    Notes:

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

    Crystals are probably metamic.