Ashanite

Not a valid mineral species
(Discredited 1998)
Uranium
(No Images)

  Sometimes described as being a mixture of Ixiolite, Samarskite-(Y) and Uranmicrolite  

Property Data Remarks
Named for: for Altai, and the Chinese word Shan, meaning "mountains," its type location occurrence in the Altai Mountains, China.
Alternate
    Name(s):
  • Ashanit
  • Ashanita
 
Mineral Class:
Oxides
  Oxides with metal:
[metal:oxygen = 1:2 (MO2 and related compounds)]
    Qitianglinite - Lithiowodginite series
 
Chemical
    Formula:
(Nb,Ta,U,Fe,Mn)4O8  
Chemical
    Composition:
Iron: (Fe) 6.81%
Manganese: (Mn) 2.87%
Niobium: (Nb) 25.89%
Oxygen: (O) 22.29%
Tantalum: (Ta) 18.91%
Uranium: (U) 20.73%
REE2O3
  Lanthanum:
  Cerium:
  Praeseodymium:
  Neodymium:
  Samarium:
 
(La)
(Ce)
(Pr)
(Nd)
(Sm)
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2.51%  
by weight
Molecular
    Weight:
574.20 daltons (amu)
Specific
    Radioactivity:

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

Specific Activity Dose Rate
Becquerels Curies  milliRems 
hour
 microSieverts 
hour
3.7158 × 1004 1.00 × 10-06 0.51 50.90

Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)

Crystalography:
System: Orthorhombic - Dipyramidal
Axial Ratios: a: 1.2043
b: 1
c: 1.0703
Cell Dimensions: a: 5.869 Å
b: 4.873 Å
c: 5.216 Å
Z: 1
V: 149.18 Å3
DenCalc: 7.58
H-M Symbol: 2/m 2/m 2/m
Space Group: Pcan
X-Ray Diffraction:
  By Intensity ( I/Io )
(1): 2.95 Å
(0.5): 3.65 Å
(0.3): 2.51 Å
 
Habit:
  •  
    Cleavage: None  
    Fracture: Conchoidal  
    Moh's
        Hardness:
    5.5 - 6.5  
    Density: 6.61 grams/cm3
    Color: Dark brown to Blackish  
    Streak: Brown  
    Luster: Sub-metallic  
    Diaphaniety: Opaque  
    Pleochroism:
    (x):  
    (y:)  
    (z:)  
     
    Ultra Violet
        Fluorescence:
    Long Wave:  
    Short Wave:  
     
    Magnetism: Non-magnetic  
    Occurance:
  • In the central part of pegmatite in albitized two-mica granite.
  •  
    Associated
        Minerals:

    Beryl, 'Columbite', Elbaite, Ixiolite, Microlite, Monazite, Muscovite, Samarskite, Tantalite, 'Tietaiyangite', Uranmicrolite, Zircon

    Minerals   -   Uranium & Thorium
    mineral links

    These are minerals known to be found with Ashanite
    Localities:

    Extremely rare

    Ashanite Localities

    Notes:

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

    Crystals are probably metamic.

    Related chemically to Ixiolite, Samarskite and Uranmicrolite.