Metavanmeersscheite

 IMA-A 1981-010
Uranium 42.7.14.2
(Dana Classification Number)
(No Images) 7/E.07-150
(Strunz ID)

Property Data Remarks
Named for: for being the meta- form of Vanmeersscheite, in turn named for Maurice Van Meerssche, Belgian crystallographer, Professor at the University of Louvain-la-Neuve, Belgium.
Alternate
    Name(s):
  		•  
    Mineral Class:
    Phosphates, Arsenates and Vanadates
      Uranylphosphates and uranylvanadates with
    [UO2]+2 - [PO4 | AsO4]-3 and
    [UO2]+2 - [V2O8]-6
        Phosphuranylite series
    		 
    Chemical
        Formula:    		 U+6(UO2)3(PO4)2(OH)6 · 2H2O  
    Chemical
        Composition:
    Hydrogen: (H) 0.73%
    Oxygen: (O) 25.58%
    Phosphorus: (P) 4.50%
    Uranium:
      (UO2):
      (UO3):    		 (U) 69.19%
      (58.87%)
      (20.78%)
    		by weight
    Molecular
        Weight:    		 1,376.13 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    1.23846 × 1005 3.35 × 10-06 1.65 164.56

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Orthorhombic - Pyramidal
    Axial Ratios: a: 1.0088
    b: 1
    c: 0.4154
    Cell Dimensions: a: 34.18 Å
    b: 33.88 Å
    c: 14.074 Å
    Z: 32
    V: 16,297.95 Å3
    DenCalc: 4.49
    H-M Symbol: mm2
    Space Group: Fdd2
    X-Ray Diffraction:
      By Intensity ( I/Io )    		 (1): 8.49 Å
    (0.9): 6.01 Å
    (0.7): 3.073 Å
    		Metavanmeersscheite
    Crystal
    Habit:
  		•  
    Cleavage:
    [001]  
    [010] Good
    [100] Distinct
    		 
    Fracture:    
    Moh's
        Hardness:    		 2 - 3  
    Density: 4.49 grams/cm3
    Color: Canary-yellow  
    Streak: Light or Pale yellow  
    Luster:    
    Diaphaneity:    
    Pleochroism:
    (x):  
    (y:)  
    (z:)  
    		 
    Ultra Violet
        Fluorescence:
    Long Wave:  
    Short Wave:  
    		 
    Magnetism: Non-magnetic  
    Occurance:
  		•  
    Associated
        Minerals:

    Althupite, Amblygonite, Bermanite, Beryl, 'Columbite', Dumontite, Eylettersite, Furongite, Kamitugaite, Lusungite, Meta-Autunite, Metavanmeersscheite, Montebrasite, Moreauite, Mundite, Phosphuranylite, Phuralumite, Plumbomicrolite, Quartz, Ranunculite, Rutherfordine, Saléeite, Studtite, Threadgoldite, Triangulite, Upalite, Uraninite, Vanmeersscheite, Wakefieldite-(Ce)

    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found with Metavanmeersscheite
    Locations:

    Extremely rare

    Metavanmeersscheite Locations
    Notes:

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

    Crystals are probably metamic.