Huttonite

 IMA-GP
Thorium 51.5.3.1
(Dana Classification Number)
(No Images) 8/A.11-10
(Strunz ID)

  This is the Thorium end of the Huttonite, Thorite, Coffinite Silicate series.  

Property Data Remarks
Named for: C. Osborne Hutton (1910 - 1971), mineralogist and petrographer at the University of Stanford, Palo Alto, California, U.S.A.
Alternate
    Name(s):
  		•  
    Mineral Class:
    Silicates
      Nesosilicates with
    [SiO4]-4groups, cations of octahedral and cubic orientation [8+6]
        Huttonite - Tombarthite-(Y) series
    		 
    Chemical
        Formula:    		 ThSiO4  
    Chemical
        Composition:
    Oxygen: (O) 19.74%
    Silcon: (Si) 8.67%
    Thorium: (U) 71.59%
    		by weight
    Molecular
        Weight:    		 324.12 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    3.2072 × 1004 8.67 × 10-07 0.42 4.21

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Monoclinic - Prismatic
    Axial Ratios: a: 0.977
    b: 1
    c: 0.9396
    Cell Dimensions: a: 6.8 Å
    b: 6.96 Å
    c: 6.54 Å
    Z: 4
    b: 104.99°
    V: 298.99 Å3
    DenCalc: 7.20
    H-M Symbol: 2/m
    Space Group: P21/n
    X-Ray Diffraction:
      By Intensity ( I/Io )    		 (1): 3.09 Å
    (0.9): 2.89 Å
    (0.75): 4.23 Å
    		 
    Habit:
  		•  
    Cleavage:
    [001] Distinct
    [010]  
    [100] Indistinct
    		 
    Fracture: Conchoidal  
    Moh's
        Hardness:    		 5  
    Density: 7.1 grams/cm3
    Color: Colourless  
    Streak: White  
    Luster: Adamantine  
    Diaphaneity: Transparent  
    Pleochroism:
    (x): Colorless
    (y:) Colorless
    (z:) Colorless
    		 
    Ultra Violet
        Fluorescence:
    Long Wave:  
    Short Wave:  
    		 
    Magnetism: Non-magnetic  
    Occurance:
  		•  
    Associated
        Minerals:

    Albite, Chalcopyrite, Fluorapatite, Hematite, Microcline, Muscovite, Pyrite, Quartz, Thorite, Zircon

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

    		These are minerals known to be found with Huttonite
    Localities:

    Vaery rare

    Huttonite Localities
    Notes:

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

    Crystals are probably metamic.