Spriggite

 IMA-2002-014
Uranium 5.2.3.1
(Dana Classification Number)
(No Images) 4/X.00-00
(Strunz ID)

Property Data Remarks
Named for: Reginald Claude Sprigg, (1919 - 1994), Australian geologist and founder of the Arkaroola Tourist Resort, on which the type locality is located.
Alternate
    Name(s):
  		•  
    Mineral Class:
    Oxides
      Uranyl ([UO2]+2) hydroxides and hydrates
        Fourmarierite - Masuyite series

    New structure type    		  
    Chemical
        Formula:    		 Pb3[(UO2)6O8(OH)2] · xH2O

    [x = ~3]    		  
    Chemical
        Composition:
    Hydrogen: (H) 0.36%
    Lead: (Pb) 18.41%
    Oxygen: (O) 17.77%
    Uranium: (U) 63.46%
    		by weight
    Molecular
        Weight:    		 2,250.62 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    1.05787 × 1005 2.86 × 10-06 1.36 135.67

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Monoclinic - Prismatic
    Axial Ratios: a: 2.3648
    b: 1
    c: 1.1674
    Cell Dimensions: a: 28.355 Å
    b: 11.99 Å
    c: 13.998 Å
    Z: 8
    b: 104.248°
    V: 4,612.60 Å3
    DenCalc: 6.98
    H-M Symbol: 2/m
    Space Group: C2/c
    X-Ray Diffraction:
      By Intensity ( I/Io )    		 (1): 3.1 Å
    (0.8): 3.46 Å
    (0.6): 1.918 Å
    (0.6): 6.92 Å
    (0.3): 2.01 Å
    (0.3): 2.74 Å
    (0.3): 6.02 Å
    		 
    Habit:
  • Prismatic
    		•   
    Cleavage:
    [001]  
    [010]  
    [100] Good
    		 
    Fracture: Brittle - Uneven  
    Moh's
        Hardness:    		 4  
    Density:   grams/cm3
    Color: Bright Orange  
    Streak: Pale Orange  
    Luster: Vitreous  
    Diaphaneity: Transparent  
    Pleochroism:
    (x):  
    (y:)  
    (z:)  
    		 
    Ultra Violet
        Fluorescence:
    Long Wave:  
    Short Wave:  
    		 
    Magnetism: Non-magnetic  
    Occurance:
  • Found in the alteration zone of a hydrothermal hematite-U-Nb-REE deposit from the Mt Painter in-lier
  		•   
    Associated
        Minerals:

    Baryte, Billietite, Boltwoodite, Dewindtite, 'Fergusonite', Fluorapatite, Fluorite, Françoisite-(Nd), Goethite, Kasolite, Metaschoepite, Metatorbernite, Monazite-(Ce), Opal var: Hyalite, Phosphosiderite, Quartz var: Smoky Quartz, Rutherfordine, Samarskite-(Y), Schoepite, Soddyite, Spriggite, Uranophane-beta, Uranosphaerite, Weeksite, Xenotime-(Y)

    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found with Spriggite
    Locations:

    Extremely rare

    Spriggite Locations
    Notes:

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

    Crystals are probably metamic.