Schröckingerite

 IMA-GP
Uranium 17.1.5.1
(Dana Classification Number)
(Images) 6/D.21-20
(Strunz ID)

Property Data Remarks
Named for: Julius Freiherr Schrockinger von Neudenberg(1814-1882), Austrian geologist, discovered Uranium at Jochymov, Bohemia, Czech Republic
Alternate
    Name(s):
  • Schroeckingerite
  • Dakeite
    		•   
    Mineral Class:
    Sulfates,Chromates,Molybdates and Tungstates
      Uranylsulfates [UO2]+2 - [SO4]-2
        Johannite - Schröckingerite series
    		 
    Chemical
        Formula:    		 NaCa3UO2SO4(CO3)3F · 10H2O  
    Chemical
        Composition:
    Calcium: (Ca) 13.53%
    Carbon: (C) 4.06%
    Flourine: (F) 2.14%
    Hydrogen: (H) 2.27%
    Oxygen: (O) 45.02%
    Sodium: (Na) 2.59%
    Sulfur: (S) 3.61%
    Uranium: (U) 26.79%
    		by weight
    Molecular
        Weight:    		 888.49 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    4.7954 × 1004 1.30 × 10-06 0.72 71.99

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Orthorhombic - Dipyramidal
    Axial Ratios: a: 0.5757
    b: 1
    c: 0.8472
    Cell Dimensions: a: 9.69 Å
    b: 16.83 Å
    c: 14.26 Å
    Z: 4
    V: 2,325.56 Å3
    DenCalc: 2.54
    H-M Symbol: 2/m 2/m 2/m
    Space Group: Cmmm
    X-Ray Diffraction:
      By Intensity ( I/Io )    		 (1): 7.26 Å
    (0.8): 4.796 Å
    (0.7): 8.48 Å
    		Schrockingerite
    Crystal
    Habit:
  • Pseudohexagonal platy crystals
  • Crusts
    		•   
    Cleavage:
    [???] Perfect
    		 
    Fracture:    
    Moh's
        Hardness:    		 2.5  
    Density: 2.5 - 2.6 grams/cm3
    Color: Yellow-green to Greenish-yellow  
    Streak: Slightly off-white to Yellowish-white  
    Luster: Vitreous to Pearly  
    Diaphaneity: Transparentto Translucent  
    Pleochroism:
    (x): Colorless
    (y:) Colorless
    (z:) Colorless
    		 
    Ultra Violet
        Fluorescence:

    Most specimens are non-fluorescent

    Long Wave:  
    Short Wave: Dark red
    		 
    Magnetism: Non-magnetic  
    Occurance:
  • A secondary Uranium mineral
  • (also found on cave and mine walls)
    		•   
    Associated
        Minerals:

    Acanthite, Andersonite, Annabergite, Autunite, Barite, Bismuth, Bismuthinite, Bornite, Calcite, Carnotite, Chalcocite, Chalcopyrite, Coffinite, Covellite, Dolomite, Erythrite, Fluorite, Galena, Goethite, Gypsum, Hematite, Kaolinite, Liebigite, Malachite, Marcasite, Pyrite, Quartz, Silver, Skutterudite, Sodium-Zippeite, Sphalerite, Tennantite, Tyuyamunite, Uraninite, Uranophane, Uranopilite, Zippeite

    Mineral   -   > 48% of sites
    Mineral   -   > 32% of sites
    Mineral   -   > 16% of sites
    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found with Schröckingerite
    Locations:

    Rare

    Schröckingerite Locations
    Notes:

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

    Crystals may be metamict.

    Schröckingerite Images

    Specimen Top
    (001a) (001b) (001c) (001d)
      (001e) (001f)  
       
    Jack Daniels No. 1 Mine, Cameron District, Coconino Co., Arizona, U.S.A.

    Specimen Notes

    Occurrence -  

     

    Crystals -  

     

    Appearence -  

    Diaphaniety -

    Luster -

     

      -  

     

    Specimen Physical Properties
    Size   cm   cm   cm
    Weight: x grams    
    g-Radiation Level:   cmp   msieverts background: 20 cpm