Metazeunerite

 IMA-GP
Uranium 40.2a.14.2
(Dana Classification Number)
(No Images) 7/E.02-70
(Strunz ID)

Property Data Remarks
Named for: Being the meta- form of Zeunerite, which is named for Gustav A. Zeuner (1828-1907), Director of the School of Mines at Freiberg, Saxony, Germany
Alternate
    Name(s):
  • Meta-Zeunerite
    		•   
    Mineral Class:
    Phosphates, Arsenates and Vanadates
      Uranylphosphates and Uranylvanadates with
    [UO2]2+ - [PO4 | AsO4]3- and
    [UO2]2+ - [V2O8]6-
        Meta-Autunite group
    		 
    Chemical
        Formula:    		 Cu(UO2)2(AsO4)2 · 8H2O  
    Chemical
        Composition:
    Arsenic: (As) 14.61%
    Copper: (Cu) 6.20%
    Hydrogen: (H) 1.57%
    Oxygen: (O) 31.20%
    Uranium: (U) 46.42%
    		by weight
    Molecular
        Weight:    		 1,025.56 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    8.3090 × 1004 2.25 × 10-06 1.15 115.42

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Tetragonal - Dipyramidal
    Axial Ratios: a: 1
    c: 2.45352
    Cell Dimensions: a: 7.1 Å
    c: 17.42 Å
    Z: 2
    V: 878.14 Å3
    DenCalc: 3.88
    H-M Symbol: 4/m
    Space Group: P4/n
    X-Ray Diffraction:
      By Intensity ( I/Io )    		 (1): 3.73 Å
    (1): 8.86 Å
    (0.8): 5.57 Å
    		 
    Habit:
  • Tabular crystals, square to rectangular, dominated by two pinacoid faces
  • Bipyramidal crystals are also seen
  • Crystals can look cubic (pseudocubic)
  • Crusts
  • Micaceous
  • Foliated
  • Earthy
    		•   
    Cleavage:
    [001] Perfect
    [100] Distinct

    Cleavage sheets are brittle.

    		  
    Fracture: Uneven  
    Moh's
        Hardness:    		 2 - 2.5  
    Density: 3.64 - 3.85 grams/cm3
    Color: Pale to Dark green  
    Streak: Greenish white  
    Luster: Vitreous to Dull - Pearly luster on [001]  
    Diaphaneity: Transparent - Translucent - Opaque  
    Dichroism:
    (e): Colorless
    (w:) Colorless
    		 
    Ultra Violet
        Fluorescence:
    Long Wave: Fluorescent
    Short Wave: Fluorescent
    		 
    Magnetism: Non-magnetic  
    Occurance:
  • secondary mineral from uranium and arsenic minerals
    		•   
    Associated
        Minerals:

    Arsenopyrite, Azurite, Barite, Bornite, Brochantite, Calcite, Cerussite, Chalcocite, Chalcopyrite, Chrysocolla, Copper, Cornubite, Covellite, Erythrite, Fluorite, Galena, Goethite, Gypsum, Heinrichite, Hematite, Langite, Malachite, Meta-Autunite, Metatorbernite, Mimetite, Olivenite, Pyrite, Quartz, Sarkinite, Scorodite, Silver, Sphalerite, Tennantite, Uraninite, Zeunerite

    Mineral   -   > 33% of sites
    Mineral   -   > 50% of sites
    Mineral   -   > 67% of sites
    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found with Metazeunerite
    Locations:

    Relatively common uranium mineral

    Metazeunerite Locations
    Notes:

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

    Almost all meta-zeunerite crystals are pseudomorphs of zeunerite.

    Metazeunerite can be confused with Metalodevite; X-ray and chemical tests are best for verification.