Cleusonite

(Proposed Name)		 IMA-1998-070
Uranium 8.5.1.10
(Dana Classification Number)
(No Images) 4/X.00-00
(Strunz ID)

Property Data Remarks
Named for: the type locality: Lake of Cleuson, Nendaz Valley, Sion (near), Valais, Switzerland
Alternate
    Name(s):
  		•  
    Mineral Class:
    Oxides
      Unclassified Strunz Oxides
        Crichtonite Group
    		 
    Chemical
        Formula:    		 Pb(U+4,U+6)(Ti,Fe2+,Fe3+)20(O,OH)38  
    Chemical
        Composition:
    Hydrogen: (H) 0.10%
    Iron: (Fe) 21.52%
    Lead: (Pb) 9.98%
    Oxygen: (O) 29.28%
    Titanium: (Ti) 27.67%
    Uranium: (U) 11.46%
    		by weight
    Molecular
        Weight:    		 2,076.56 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    2.0518 × 1004 5.55 × 10-07 0.29 29.45

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Trigonal - Rhombohedral
    Axial Ratios: a: 1
    c: 2.01626
    Cell Dimensions: a: 10.576 Å
    c: 21.324 Å
    Z:  
    a:   °
    b:   °
    g:   °
    V: 2,065.58 Å3
    DenCalc:  
    H-M Symbol: -3
    Space Group: R3
    X-Ray Diffraction:
      By Intensity ( I/Io )    		 (0.6): 2.891 Å
    (0.6): 3.41 Å
    (0.35): 2.248 Å
    (0.3): 2.993 Å
    (0.3): 3.06 Å
    (0.3): 5.16 Å
    (0.3): 6.86 Å
    (0.25): 3.23 Å
    		 
    Habit:
  		•  
    Cleavage:
    [001]  
    [010]  
    [100]  
    		 
    Fracture:    
    Moh's
        Hardness:    		    
    Density:    
    Color: Black  
    Streak:    
    Luster: Sub-metalic  
    Diaphaneity: Opaque  
    Pleochroism:
    (x):  
    (y:)  
    (z:)  
    		 
    Ultra Violet
        Fluorescence:
    Long Wave:  
    Short Wave:  
    		 
    Magnetism: Non-magnetic  
    Occurance:
  • Crichtonite group
    		•   
    Associated
        Minerals:

    Mineral   -   > 50% of sites
    Mineral   -   > 25% of sites
    Mineral   -   > 15% of sites
    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found with IMA1998-070 (Cleusonite)
    Localities:

    Extremely Rare!

    IMA1998-070 (Cleusonite) Localities (None Listed)
    Notes:

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

    Crystals are probably metamic.