Heinrichite

 IMA-GP
Uranium 40.2a.4.1
(Dana Classification Number)
(No Images) 7/E.01-120
(Strunz ID)
Unless sealed in glass, all specimens should be considered to have become Metaheinrichite within a few months of being exposed to ambient air.

Property Data Remarks
Named for: Eberhardt William Heinrich (1918-1991), Mineralogist, University of Michigan
Alternate
    Name(s):
  • Arsenouranocircite
  • Arsenuranocircite
  • Uranosandbergite
    		•   
    Mineral Class:
    Phosphates, Arsenates and Vanadates
      Uranylphosphates and uranylvanadates with
    [UO2]2+ - [PO4 | AsO4]3- and
    [UO2]2+ - [V2O8]6-
        Autunite group
    		 
    Chemical
        Formula:    		 Ba(UO2)2(AsO4)2 · 10-12H2O  
    Chemical
        Composition:
    Arsenic: (As) 12.99%
    Barium: (Ba) 11.91%
    Hydrogen: (H) 1.92%
    Oxygen: (O) 31.90%
    Uranium: (U) 41.27%
    		by weight
    Molecular
        Weight:    		 1,153.39 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    7.3882 × 1004 2.00 × 10-06 1.03 102.69

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Tetragonal - Ditetragonal Dipyramidal
    Axial Ratios: a: 1
    c: 2.88359
    Cell Dimensions: a: 7.13 Å
    c: 20.56 Å
    Z: 2
    V: 1,045.21 Å3
    DenCalc: 3.66
    H-M Symbol: 4/m 2/m 2/m
    Space Group: IA/mmm
    X-Ray Diffraction:
      By Intensity ( I/Io )    		 (1): 3.57 Å
    (0.8): 5.03 Å
    (0.8): 8.89 Å
    		 
    Habit:
  		•  
    Cleavage:
    [001] Perfect
    [010]  
    [100] Distinct
    		 
    Fracture:    
    Moh's
        Hardness:    		 2.5  
    Density: 3.61 grams/cm3
    Color: Pale yellow, Greenish-yellow  
    Streak: Yellow white  
    Luster: Vitreous - Pearly  
    Diaphaneity: Transparent to Translucent  
    Dichroism:
    (e): Colorless
    (w:) Colorless
    		 
    Ultra Violet
        Fluorescence:
    Long Wave: Fluorescent
    Short Wave: Fluorescent
    		 
    Magnetism: Non-magnetic  
    Occurance:
  		•  
    Associated
        Minerals:

    Acanthite, Anatase, Annabergite, Aragonite, Arsenolite, Arsenopyrite, Azurite, Barite, Billietite, Bismuth, Bismuthinite, Bornite, Brochantite, Calcite, Chalcocite, Chalcopyrite, Chrysocolla, Cinnabar, Conichalcite, Copper, Cornwallite, Covellite, Digenite, Dolomite, Erythrite, Fluorite, Galena, Goethite, Gypsum, Hematite, Kaolinite, Lavendulan, Löllingite, Malachite, Marcasite, Metaheinrichite, Metazeunerite, Mixite, Novácekite, Olivenite, Preisingerite, Pyrite, Pyrolusite, Quartz, Rammelsbergite, Safflorite, Scorodite, Silver, Skutterudite, Sphalerite, Tennantite, Tyrolite, Uraninite, Uranophane, Uranospinite, Wolsendorfite, Zeunerite

    Mineral   -   > 80% of sites
    Mineral   -   > 60% of sites
    Mineral   -   > 80% of sites
    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found with Heinrichite
    Localities:

    Rare

    Heinrichite Localities
    Notes:

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

    Crystals are probably metamict.