Mundite

 IMA-A 1980-075
Uranium 42.7.13.1
(Dana Classification Number)
(No Images) 7/E.07-20
(Strunz ID)

Property Data Remarks
Named for: Walter Mund (1892-1956), radiochemist, University of Louvain, 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:    		 Al(UO2)3(PO4)2(OH)3 · 5H2O  
    Chemical
        Composition:
    Aluminum: (Al) 2.31%
    Hydrogen: (H) 1.12%
    Oxygen: (O) 30.13%
    Phosphorus: (P) 5.30%
    Uranium: (U) 61.13%
    		by weight
    Molecular
        Weight:    		 1,168.11 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    1.09426 × 1005 2.96 × 10-06 1.49 149.01

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Orthorhombic
    Axial Ratios: a: 0.5513
    b: 1
    c: 0.4441
    Cell Dimensions: a: 17.08 Å
    b: 30.98 Å
    c: 13.76 Å
    Z: 16
    V: 7,280.94 Å3
    DenCalc: 4.26
    H-M Symbol:  
    Space Group: P21cn, Pmcn
    X-Ray Diffraction:
      By Intensity ( I/Io )    		 (1): 7.8 Å
    (0.7): 3.37 Å
    (0.6): 3.87 Å
    		Mundite
    Crystal
    Habit:
  		•  
    Cleavage:
    [001] Perfect
    [010] Perfect
    [100] Perfect
    		 
    Fracture:    
    Moh's
        Hardness:    		 2 - 3  
    Density: 4.295 grams/cm3
    Color: Golden brown, Light yellow  
    Streak: White  
    Luster:    
    Diaphaneity: Translucent  
    Pleochroism:
    (x): Weak yellow
    (y:) Weak yellow
    (z:) Weak yellow
    		 
    Ultra Violet
        Fluorescence:
    Long Wave:  
    Short Wave:  
    		 
    Magnetism: Non-magnetic  
    Occurance:
  		•  
    Associated
        Minerals:

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

    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found with Mundite
    Locations:

    Extremely rare

    Mundite Locations
    Notes:

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

    Crystals are probably metamic.