Kamotoite-(Y)

 IMA-A 1985-051
Uranium 16b.3.3.1
(Dana Classification Number)
(Images) 5/F.06-20
(Strunz ID)

Property Data Remarks
Named for: Kamoto East mine, Kolwezi, Shaba (Katanga), Congo (Zaïre), its type locality
Alternate
    Name(s):
  		•  
    Mineral Class:
    Nitrates, Carbonates and Borates
      Uranylcarbonates ([UO2]4+ - [CO3]2-)
        Astrocyanite-(Ce) - Bijvoetite-(Y) series
    		 
    Chemical
        Formula:    		 (Y,Nd,Gd)2U6+4(CO3)3 · 14.5H2O  
    Chemical
        Composition:
    Carbon: (C) 2.21%
    Gadolinium: (Gd) 2.89%
    Hydrogen: (H) 1.79%
    Neodymium: (Nd) 5.30%
    Oxygen: (O) 23.01%
    Yttrium: (Y) 6.53%
    Uranium: (U) 58.28%
    		by weight
    Molecular
        Weight:    		 1,633.77 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    9.5375 × 1004 2.58 × 10-06 1.31 13.11

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Monoclinic - Prismatic
    Axial Ratios: a: 1.6411
    b: 1
    c: 0.9582
    Cell Dimensions: a: 21.22 Å
    b: 12.93 Å
    c: 12.39 Å
    Z: 4
    b: 115.3°
    V: 3,073.43 Å3
    DenCalc: 3.53
    H-M Symbol: 2/m
    Space Group: P21/a
    X-Ray Diffraction:
      By Intensity ( I/Io )    		 (1): 6.48 Å
    (0.8): 8.49 Å
    (0.6): 3.054 Å
    		Kamotoite-(Y)
    Crystal
    Habit:
  		•  
    Cleavage:
    [???] Good
    [010]  
    [100]  
    		 
    Fracture:    
    Moh's
        Hardness:    		    
    Density: 3.93 grams/cm3
    Color: Lemon yellow  
    Streak:    
    Luster: Vitreous  
    Diaphaneity: Transparent to Translucent  
    Pleochroism:
    (x):  
    (y:)  
    (z:)  
    		 
    Ultra Violet
        Fluorescence:
    Long Wave:  
    Short Wave:  
    		 
    Magnetism: Non-magnetic  
    Occurance:
  		•  
    Associated
        Minerals:

    Biotite, 'Chlorite Group', Cuprite, Kasolite, Liebigite, Magnetite, Malachite, Masuyite, Metatorbernite, Molybdenite, Muscovite, Quartz, Schoepite, Urancalcarite, Uraninite, Uranophane, Zeunerite

    Mineral   -   > 75% of sites
    Mineral   -   > 50% of sites
    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found with Kamotoite-(Y)
    Localities:

    Extremely rare

    Kamotoite-(Y) Localities
    Notes:

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

    Kamotoite-(Y) Images

    Specimen #1
      (001ta)  
     
    (w. Astrocyanite-(Ce))    		  
      Kamoto East mine, Kolwezi, Shaba (Katanga), Congo (Zaïre)  


    Specimen Notes

    See Astrocyanite-(Ce)