Calciobetafite

 IMA-A 1982-064
Uranium 8.2.3.5
(Dana Classification Number)
(No Images) 4/C.17-20
(Strunz ID)

Property Data Remarks
Named for: A Calcium variety of Betafite
Alternate
    Name(s):
  		•  
    Mineral Class:
    Oxides
      Oxides with metal: [metal:oxygen = 2:3 (M2O3 and related compounds)]
        Pyrochlore group, Pyrochlore series with Nb > Ti
    		 
    Chemical
        Formula:    		 Ca2(Ti,Nb)2(O,OH)7  
    Chemical
        Composition:
    Calcium: (Ca) 15.25%
    Fluorine: (F) 0.48%
    Hydrogen: (H) 0.08%
    Iron: (Fe) 1.42%
    Niobium: (Nb) 28.27%
    Oxygen: (O) 25.56%
    Titanium: (Ti) 9.71%
    Thorium: (Th) 5.88%
    Uranium: (U) 6.04%
    REE2O3
      Lanthanum
      Cerium
      Praseodymium
      Neodymium
      Samarium:    		  
    (La)
    (Ce)
    (Pr)
    (Nd)
    (Sm)    		 |
    |
    |
    |
    |
    |    		 7.30%
    		by weight
    Molecular
        Weight:    		 394.30 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    1.3443 × 1004 3.63 × 10-07 0.19 19.36

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Isometric - Hexoctahedral
    Cell Dimensions: a: 10.2978 Å
    Z: 8
    V: 1,092.03 Å3
    DenCalc: 4.80
    H-M Symbol: 4/m -3 2/m
    Space Group: Fd3m
    X-Ray Diffraction:
      By Intensity ( I/Io )    		 (1): 2.973 Å
    (0.53): 1.82 Å
    (0.45): 1.552 Å
    		 
    Habit:
  		•  
    Cleavage:
    [001]  
    [010]  
    [100]  
    		 
    Fracture: Conchoidal - Uneven  
    Moh's
        Hardness:    		 4.0 - 5.5  
    Density: 4.2 - 4.5 grams/cm3
    Color: Reddish brown  
    Streak: .  
    Luster: Resinous  
    Diaphaneity: Subtranslucent to Opaque  
    Pleochroism:
    (x):  
    (y:)  
    (z:)  
    		 
    Ultra Violet
        Fluorescence:
    Long Wave:  
    Short Wave:  
    		 
    Magnetism: Non-magnetic  
    Occurance:
  • In a subvolcanic rock, locally termed "sanidinite", present in a phreatomagmatic explosion breccia
    		•   
    Associated
        Minerals:

    Augite, Baddeleyite, Biotite, Calcite, Cancrinite, Corundum, Epidote, Fluorapatite, Fluorite, Forsterite, Goethite, Grossular, Haüyne, Hematite, Magnetite, Nepheline, Nosean, Quartz, Rutile, Sanidine, 'Scapolite', Spinel, Titanite, Zircon

    Mineral   -   all of the sites
    Mineral   -   > 65% of sites
    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found with Calciobetafite
    Localities:

    Very rare

    Calciobetafite Localities
    Notes:

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

    Crystals are possably metamic.