Moreauite

 IMA-A 1984-010
Uranium 42.12.3.1
(Dana Classification Number)
(No Images) 7/E.05-60
(Strunz ID)

Property Data Remarks
Named for: Jules Moreau, Professor of mineralogy at the University of Leuven, Belgium.
Alternate
    Name(s):
  		•  
    Mineral Class:
    Phosphates, Arsenates and Vanadates
      Uranylphosphates and uranylvanadates with
    [UO2]2+ - [PO4 | AsO4]3- and
    [UO2]2+ - [V2O8]6-
        Ranunculite - Moreauite series
    		 
    Chemical
        Formula:    		 Al3(UO2)(PO4)3(OH)2 · 13H2O  
    Chemical
        Composition:
    Aluminum: (Al) 8.95%
    Hydrogen: (H) 3.12%
    Oxygen: (O) 51.32%
    Phosphorus: (P) 10.28%
    Uranium: (U) 26.33%
    		by weight
    Molecular
        Weight:    		 904.10 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    4.7127 × 100 1.27 × 10-06 0.71 71.16

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Monoclinic - Prismatic
    Axial Ratios: a: 1.0918
    b: 1
    c: 0.8554
    Cell Dimensions: a: 23.41 Å
    b: 21.44 Å
    c: 18.34 Å
    Z: 16
    b: 92°
    V: 9,199.43 Å3
    DenCalc: 2.61
    H-M Symbol: 2/m
    Space Group: P21/c
    X-Ray Diffraction:
      By Intensity ( I/Io )    		 (1): 10.8 Å
    (0.8): 11.69 Å
    (0.7): 2.931 Å
    		 
    Habit:
  • Booklets of Microscopic Tabular Crystals
    		•   
    Cleavage:
    [001]  
    [010]  
    [100] Good
    		 
    Fracture:    
    Moh's
        Hardness:    		 2 - 3  
    Density: 2.64 grams/cm3
    Color: Greenish yellow, Light yellow  
    Streak: Light yellow  
    Luster:    
    Diaphaneity:    
    Pleochroism:
    (x):  
    (y:)  
    (z:)  
    		 
    Ultra Violet
        Fluorescence:

    Long Wave:  
    Short Wave:  

    Strongly Fluorescent

    		  
    Magnetism: Non-magnetic  
    Occurance:
  		•  
    Associated
        Minerals:

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

    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found with Moreauite
    Locations:

    Extremely rare

    Moreauite Locations
    Notes:

    Radioactive a- and b-particles, g-rays.

    Crystals are probably metamic.