Renardite

(Regarded as being a form of Dewindtite)		 IMA-GP (1928)
(Reportedly Discredited)
Uranium 42.4.9.2
(Dana Classification Number)
(Images) 7/X.00-00
(Strunz ID)

Property Data Remarks
Named for: Alphonse Francois Renard (1842-1903), mineralogist, University of Ghent, Belgium
Alternate
    Name(s):
  •  
    		•  
    Mineral Class:
    Phosphates, Arsenates and Vanadates
      Uranylphosphates and uranylvanadates with
    [UO2]+2 - [PO4 | AsO4]-3 and
    [UO2]+2 - [V2O8]-6
        Phosphuranylite group
    		 † 
    Chemical
        Formula:    		 Pb(UO2)4(PO4)2(OH)4 · 7H2O  
    Chemical
        Composition:
    Hydrogen: (H) 1.09%
    Lead: (Pb) 12.40%
    Oxygen: (O) 25.85%
    Phosphorus: (P) 3.71%
    Uranium: (U) 56.97%
    		by weight
    Molecular
        Weight:    		 1,671.39 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    1.01968 × 1005 2.76 × 10-06 1.36 136.39

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System:   Orthorhombic - Dipyramidal
    Axial Ratios: a: 0.9211 0.91486
    b: 1 1
    c: 0.7981 0.78286
    Cell Dimensions: a: 15.88 Å 16.01 Å  † 
    b: 17.24 Å 17.5 Å  † 
    c: 13.76 Å 13.7 Å  † 
    Z: 6 6
    V: 3,767.09 Å3  
    DenCalc: 4.42  
    H-M Symbol: 2/m 2/m 2/m
    Space Group: Bmmb
    X-Ray Diffraction:
      By Intensity ( I/Io )    		 (1): 7.95 Å 8.0 Å  † 
    (0.9): 3.11 Å 4.0 Å  † 
    (0.8): 2.88 Å 5.8 Å  † 
    (0.8):   3.13 Å  † 
    (0.8):   3.09 Å  † 
    (0.7): 3.96 Å  
    (0.6): 4.43 Å  
    (0.6): 5.83 Å  
    (0.5): 10.25 Å  
    (0.4): 3.4 Å  
    		 
    Habit:
  • Crystals form as small rectangular plates to 2 mm
  • Laths elongated along the c-axis
  • Crusts
  • Lamellar masses
  • Fiberous aggregates
  • Druse deposits
    		•   
    Cleavage:
    [001]  
    [010]  
    [100] Perfect
    		 
    Fracture:    
    Moh's
        Hardness:    		 3.5  † 
    Density: 4.34 grams/cm3
    Color: Bright yellow, Greenish yellow, Yellow-brown  
    Streak: Yellow  
    Luster: Vitreous to Adamantine  
    Diaphaneity: Translucent to Transparent  † 
    Pleochroism: Yes - no data given  † 
    Ultra Violet
        Fluorescence:
    Long Wave:  
    Short Wave:  
    		 
    Magnetism: Non-magnetic  
    Occurance:
  • In pegmatites
  		•   † 
    Associated
        Minerals:

    Autunite, Azurite, Barite, Becquerelite, Bariandite, Bijvoetite-(Y), Billietite, Brochantite, Carrollite, Cattierite, Chalcocite, Chalcomenite, Cobaltomenite, Comblainite, Covellite, Cuprosklodowskite, Curite, Demesmaekerite, Derriksite, Digenite, Dewindtite, Dumontite, Fourmarierite, Francevillite, Gold, Guilleminite, Hematite, Heterogenite-3R, Ianthinite, Kasolite, Kolwezite, Lepersonnite-(Gd), Malachite, Marthozite, Masuyite, Metaschoepite, Metastudtite, Metatorbernite, Metatyuyamunite, Mottramite, Mounanaite, Oosterboschite, Oursinite, Palladium, Paraschoepite, Parsonsite, Protasite, Rutherfordine, Schoepite, Sengierite, Sklodowskite, Soddyite, Sphaerocobaltite, Torbernite, Trogtalite, Tyuyamunite, Uraninite, Uranophane, Uranophane-beta, Vandenbrandeite, Vanuralite, Vauquelinite, Verbeekite, Wulfenite

    Mineral   -   > 50% of sites
    Mineral   -   > 25% of sites
    Mineral   -   > 15% of sites
    Minerals   -   Uranium & Thorium
    mineral links

    		 
    Locations:

    Rare

    Renardite Locations
    Notes:

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

     †  J.H. Bernard and J. Hyrsl, Minerals and their Localities

    Renardite Images

      Grury, Saone-et-Loire, Bourgogne, France