Cerianite-(Ce)

 IMA-GP
Thorium 4.4.12.1
(Dana Classification Number)
(No Images) 4/D.31-40
(Strunz ID)

Property Data Remarks
Named for: Its composition, analogous to Thorianite and Uraninite
Alternate
    Name(s):
  		•  
    Mineral Class:
    Oxides
      Oxides with metal: (metal:oxygen = 1:2 (MO2 and related compounds)
        Badleyite - Uraninite series
    		 
    Chemical
        Formula:    		 (Ce+4,Th)O2  
    Chemical
        Composition:
    Cerium: (Ce) 53.86%
    Oxygen: (O) 16.40%
    Thorium: (Th) 29.73%
    		by weight
    Molecular
        Weight:    		 195.09 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    1.3321 × 1004 3.60 × 10-07 0.18 17.53

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Isometric - Hexoctahedral
    Cell Dimensions: a: 5.42 Å
    Z: 4
    V: 159.22 Å3
    DenCalc: 8.14
    H-M Symbol: 4/m -3 2/m
    Space Group: Fm3m
    X-Ray Diffraction:
      By Intensity ( I/Io )    		 (1): 3.124 Å
    (0.51): 1.913 Å
    (0.44): 1.632 Å
    		 
    Habit:
  		•  
    Cleavage:
    [001]  
    [010]  
    [100]  
    		 
    Fracture:    
    Moh's
        Hardness:    		   (expected to be
    4.5 - 6.5)
    Density: 7.216 grams/cm3
    Color: Greenish yellow, Resin-brown  
    Streak:    
    Luster:    
    Diaphaneity: Translucent  
    Pleochroism:
    (x):  
    (y:)  
    (z:)  
    		 
    Ultra Violet
        Fluorescence:
    Long Wave:  
    Short Wave:  
    		 
    Magnetism: Non-magnetic  
    Occurance:
  		•  
    Associated
        Minerals:

    Aegirine, Albite, Allanite-(Ce), Analcime, 'Apatite', Barite, Bastnäsite-(Ce), Bertrandite, Biotite, Calcite, 'Chabazite', Chalcopyrite, Fluorite, Galena, Goethite, Hematite, 'Hornblende', Ilmenite, Magnetite, Malachite, Microcline, Molybdenite, Monazite-(Ce), Muscovite, Pyrite, Pyrochlore, Pyrrhotite, Quartz, Thorite, Titanite, Xenotime-(Y), Zircon

    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 Cerianite-(Ce)
    Localities:

    Rare

    Cerianite-(Ce) Localities
    Notes:

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

    Crystals are probably metamic.