Trögerite

 IMA-GP
Uranium 40.2a.20.1
(Dana Classification Number)
(No Images) 7/E.01-10
(Strunz ID)

Property Data Remarks
Named for: R. Troger, mining offical at Schneeberg, Germany
Alternate
    Name(s):
  • Troegerite
  • Trögerit
  • Trögerita
    		•   
    Mineral Class:
    Phosphates, Arsenates and Vanadates
      Uranylphosphates and uranylvanadates with
    [UO2]2+ - [PO4 | AsO4]3- and
    [UO2]2+ - [V2O8]6-
        Autunite group
    		 
    Chemical
        Formula:    		 (UO2)3(AsO4)2 · 12H2O  
    Chemical
        Composition:
    Arsenic: (As) 15.54%
    Hydrogen: (H) 1.88%
    Oxygen: (O) 33.19%
    Uranium: (U) 49.38%
    		by weight
    Molecular
        Weight:    		 964.03 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    8.8394 × 1004 2.39 × 10-06 1.23 122.88

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Tetragonal - Ditetragonal Dipyramidal
    Axial Ratios: a:c = 1:1.22905
    Cell Dimensions: a = 7.16, c = 8.8, Z = 1; V = 451.14 Den(Calc) = 3.55
    H-M Symbol: 4/m 2/m 2/m
    Space Group: P4/nmm
    X Ray Diffraction: By Intensity(I/Io): 8.59(1) 3.79(0.9) 3.3(0.8)
    		 
    Habit:
  • Micaeous
  • Striated
  • Massive
  • Crusts
  • Aggregates
    		•   
    Cleavage:
    [001] Perfect
    [010]
    [100] Good
    		 
    Fracture: Brittle  
    Moh's
        Hardness:    		 2 - 3  
    Density: 3.55 grams/cm3
    Color: Lemon yellow  
    Streak: Pale yellow  
    Luster: Vitreous - Pearly - Earthy  
    Diaphaneity: Transparent to Translucent  
    Pleochroism:
    (x):
    (y:)
    (z:)
    		 
    Ultra Violet
        Fluorescence:    		 Non-fluorescent  
    Magnetism: Non-magnetic  
    Occurance:
  • A secondary mineral of uranium mineral deposits
  • Often found growing in parallel with zeunerite
    		•   
    Associated
        Minerals:

    Aragonite, Arsenopyrite, Autunite, Azurite, Barite, Bornite, Calcite, Cerussite, Chalcocite, Chalcopyrite, Coffinite, Copper, Cuprite, Dolomite, Erythrite, Galena, Gypsum, Kaolinite, Lavendulan, Malachite, Marcasite, Metazeunerite, Molybdenite, Nickel-Skutterudite, Novácekite, Pyrite, Pyrrhotite, Silver, Sklodowskite, Sphalerite, Torbernite, Uraninite, Uranophane, Uranopilite, Zeunerite, Zippeite

    Mineral   -   > 90% of sites
    Mineral   -   > 65% of sites
    Mineral   -   > 45% of sites
    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found with Trögerite
    Locations:

    Rare

    Trogerite Locations
    Notes:

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

    Crystals are probably metamic.