Rabbittite

 IMA-GP
Uranium 16b.7.3.1
(Dana Classification Number)
(No Images) 5/F.04-30
(Strunz ID)

Property Data Remarks
Named for: John C. Rabbitt (1907-1957), geologist, U.S. Geological Survey
Alternate
    Name(s):
  		•  
    Mineral Class:
    Nitrates, Carbonates and Borates
      Uranylcarbonates ([UO2]+2 - [CO3]-2)
        Urancalcarite - Albrechtschraufite series
    		 
    Chemical
        Formula:    		 Ca3Mg3(UO2)2(CO3)6(OH)4 · 18H2O  
    Chemical
        Composition:
    Calcium: (Ca) 8.09%
    Carbon: (C) 4.85%
    Hydrogen: (H) 2.71%
    Oxygen: (O) 47.39%
    Magnesium: (Mg) 4.91%
    Uranium: (U) 32.05%
    		by weight
    Molecular
        Weight:    		 1,485.56 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    5.7362 × 1004 1.55 × 10-06 0.86 85.60

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Monoclinic
    Axial Ratios: a: 1.3697
    b: 1
    c: 0.397
    Cell Dimensions: a: 32.6 Å
    b: 23.8 Å
    c: 9.45 Å
    Z: 8
    b: 90°
    V: 7,332.07 Å3
    DenCalc: 2.69
    H-M Symbol:  
    Space Group:  
    X-Ray Diffraction:
      By Intensity ( I/Io )    		 (1): 8.24 Å
    (0.8): 4.37 Å
    (0.8): 7.79 Å
    		 
    Habit:
  • Efflorescences
  • Fibrous
  • Acicular
    		•   
    Cleavage:
    [001] Perfect
    [???] Perfect
    [???] Perfect
    		 
    Fracture: Brittle  
    Moh's
        Hardness:    		 2.5  
    Density: 2.57 - 2.6 grams/cm3
    Color: Pale green, Greenish yellow  
    Streak:    
    Luster: Silky  
    Diaphaneity:    
    Pleochroism:
    (x): Colorless
    (y:) Colorless
    (z:) Colorless
    		 
    Ultra Violet
        Fluorescence:
    Long Wave: Fluorescent
    Short Wave: Fluorescent
    		 
    Magnetism: Non-magnetic  
    Occurance:
  • Mine wall efflorescence
    		•   
    Associated
        Minerals:

    Bieberite, Galena, Johannite, Magnesium-Zippeite, Pyrite, Uranopilite

    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found at both sites with Rabbittite
    Locations:

    Very rare

    Rabbittite
    Notes:

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