Cobalt Zippeite

 IMA-1976
Uranium 31.10.4.6
(Dana Classification Number)
(No Images) 6/D.20-60
(Strunz ID)

Property Data Remarks
Named for: Its relationship to Zippeite (named for Franz Xaver Maxmillion Zippe (1791-1863), Austrian mineralogist), and its Cobalt content
Alternate
    Name(s):
  • Co-Zippeite
  • Cobalt-Zippeite
    		•   
    Mineral Class:
    Sulfates,Chromates,Molybdates and Tungstates
      Uranylsulfates [UO2]+2 - [SO4]-2
        Uranopilite - Rabejacite series
    		 
    Chemical
        Formula:    		 Co+22(UO2)6(SO4)3(OH)10 · 16H2O  
    Chemical
        Composition:
    Cobalt: (Co) 4.74%
    Hydrogen: (H) 1.70%
    Oxygen: (O) 32.20%
    Sulfur: (S) 3.87%
    Uranium: (U) 57.48%
    		by weight
    Molecular
        Weight:    		 2,484.54 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    1.02893 × 1005 2.78 × 10-06 1.42 14.21

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Orthorhombic
    Cell Dimensions: a:   Å
    b:   Å
    c:   Å
    Z:  
    a:   °
    b:   °
    g:   °
    V:   Å3
    DenCalc:  
    H-M Symbol:  
    Space Group:  
    X-Ray Diffraction:
      By Intensity ( I/Io )    		 (1): 7.21 Å
    (0.45): 3.59 Å
    (0.3): 3.12 Å
    		 
    Habit:
  • Encrustations
  • Botryoidal
    		•   
    Cleavage:
    [001]  
    [010]  
    [100]  
    		 
    Fracture:    
    Moh's
        Hardness:    		 2, or 5 - 5.5 Difference is believed to be between bulk and crystal hardness
    Density: 4.3 grams/cm3
    Color: Orange  
    Streak: Pale yellow  
    Luster: Earthy  
    Diaphaneity: Transparent to Translucent  
    Pleochroism:
    (x):  
    (y:)  
    (z:)  
    		 
    Ultra Violet
        Fluorescence:
    Long Wave:  
    Short Wave:  
    		 
    Magnetism: Non-magnetic  
    Occurance:
  		•  
    Associated
        Minerals:

    Bieberite, Calcite var: Cobaltoan Calcite, Galena, Gypsum, Johannite, Magnesium-Zippeite, Pyrite, Rabbittite, Sodium-Zippeite, Uraninite, Pitchblende, Uranopilite

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

    		These are minerals known to be found with Cobalt-Zippeite
    Localities:

    Extremely rare

    Cobalt-Zippeite Localities
    Notes:

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

    Crystals are probably metamic.