Urancalcarite

 IMA-A 1983-052
Uranium 16b.5.2.1
(Dana Classification Number)
(No Images) 5/F.04-10
(Strunz ID)

Property Data Remarks
Named for: Its Uranium, Calcium and Carbonate content
Alternate
    Name(s):
  		•  
    Mineral Class:
    Nitrates, Carbonates and Borates
      Uranylcarbonates ([UO2]+2 - [CO3]-2)
        Urancalcarite - Albrechtschraufite series
    		 
    Chemical
        Formula:    		 Ca(UO2)3(CO3)(OH)6 · 3H2O  
    Chemical
        Composition:
    Calcium: (Ca) 3.76%
    Carbon: (C) 1.13%
    Hydrogen: (H) 1.13%
    Oxygen: (O) 27.01%
    Uranium: (U) 66.97%
    		by weight
    Molecular
        Weight:    		 1,066.26 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    1.19878 × 1005 3.24 × 10-06 1.61 161.23

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Orthorhombic
    Axial Ratios: a:b:c = 0.9589:1:0.4334
    Cell Dimensions: a = 15.42, b = 16.08, c = 6.97, Z = 4; V = 1,728.24 Den(Calc)= 4.10
    H-M Symbol:
    Space Group: Pbnm, Pbn21
    X Ray Diffraction: By Intensity(I/Io): 8.06(1) 4.02(0.8) 3.488(0.7)
    		 
    Habit:
  • Acicular
  • Radial
  • Aggregates
    		•   
    Cleavage: None  
    Fracture:    
    Moh's
        Hardness:    		 2 - 3  
    Density: 4.03 grams/cm3
    Color: Light yellow to Yellow  
    Streak: Light yellow to Pale yellow  
    Luster:    
    Diaphaneity: Translucent  
    Pleochroism:
    (x):
    (y:)
    (z:)
    		 
    Ultra Violet
        Fluorescence:
    Long Wave:
    Short Wave:
    		 
    Magnetism: Non-magnetic  
    Occurance:
  • Found on uraninite
  		•   
    Associated
        Minerals:

    Aragonite, Arsenolite, Arsenuranospathite, Barite, Becquerelite, Billietite, Bornite, Calcite, Chalcocite, Chalcopyrite, Chrysocolla, Coffinite, Copper, Cornwallite, Cuprite, Cuprosklodowskite, Curienite, Dewindtite, Erythrite, Fourmarierite, Galena, Goethite, Graphite, Ianthinite, Kahlerite, Kasolite, Lavendulan, Liebigite, Löllingite, Malachite, Masuyite, Meta-Autunite, Meta-Uranopilite, Metalodevite, Metaschoepite, Metatorbernite, Metazeunerite, Mixite, Molybdenite, Novácekite, Olivenite, Parsonsite, Pharmacosiderite, Phosphuranylite, Pyrite, Pyrolusite, Rabejacite, Richetite, Rutherfordine, Saléeite, Schoepite, Sengierite, Silver, Sklodowskite, Soddyite, Sphalerite, Stromeyerite, Studtite, Torbernite, Trögerite, Tyuyamunite, Umohoite, Uraninite, Uranophane, Uranophane-beta, Uranopilite, Vandenbrandeite, Vandendriesscheite, Wolsendorfite, Wulfenite, Zeunerite, Zippeite

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

    		These are minerals known to be found with Urancalcarite
    Locations:

    Very rare

    Urancalcarite Locations
    Notes:

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

    Crystals are probably metamic.