Chernikovite

 IMA-A
Uranium 40.2a.19.1
(Dana Classification Number)
(No Images) 7/E.02-170
(Strunz ID)

Cheralite-(Ce)
Property Data Remarks
Named for: A. P. Chernikov (1927- ), Institute of Mineralogy, Geochemistry and Rare Elements, Moscow, Russia
Alternate
    Name(s):
  • Hydrogen Autunite
    		•   
    Mineral Class:
    Phosphates, Arsenates and Vanadates
      Uranylphosphates and uranylvanadates with
    [UO2]2+ - [PO4 | AsO4]3- and [UO2]2+ - [V2O8]6-
        Meta-Autunite group
    		 
    Chemical
        Formula:    		 (H3O)2(UO2)2(PO4)2 · 6H2O  
    Chemical
        Composition:
    Hydrogen: (H) 2.07%
    Oxygen: (O) 36.52%
    Phosphorus: (P) 7.07%
    Uranium: (U) 54.34%
    		by weight
    Molecular
        Weight:    		 876.14 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    9.7262 × 1004 2.63 × 10-06 1.36 136.26

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Tetragonal - Ditetragonal Dipyramidal
    Axial Ratios: a: 1
    c: 1.28817
    Cell Dimensions: a: 7.02 Å
    c: 9.043 Å
    Z: 1
    V: 445.64 Å3
    DenCalc: 3.26
    H-M Symbol: 4/m 2/m 2/m
    Space Group: P4/nmm
    X-Ray Diffraction:
      By Intensity ( I/Io )    		 (1): 9.03 Å
    (0.9): 3.8 Å
    (0.8): 3.27 Å
    (0.7): 2.77 Å
    (0.7): 3.51 Å
    (0.6): 2.96 Å
    (0.5): 2.16 Å
    (0.5): 5.56 Å
    		 
    Habit:
  • Micaceous
    		•   
    Cleavage:
    [001] Perfect
    [010]  
    [100] Distinct
    		 
    Fracture:    
    Moh's
        Hardness:    		 2 - 2.5  
    Density:   grams/cm3
    Color: Pale yellow  
    Streak: Yellow white  
    Luster: Vitreous  
    Diaphaneity: Transparent to Translucent  
    Dichroism:
    (e:) Slight
    (w:) Slight
    		 
    Ultra Violet
        Fluorescence:
    Long Wave:
    Short Wave: Intense yellow green
    		 
    Magnetism: Non-magnetic  
    Occurance:
  		•  
    Associated
        Minerals:

    Arsenopyrite, Autunite, Barite, Bassetite, Becquerelite, Brannerite, Calcite, Chalcopyrite, Chekhovichite, Coffinite, Cuprosklodowskite, Curite, Dewindtite, Dolomite, Fourmarierite, Galena, Hematite, Ianthinite, Jarosite, Johannite, Kasolite, Liebigite, 'Limonite', Magnetite, Marcasite, Meta-Autunite, Metatorbernite, Parsonsite, Phosphuranylite, Pitchblende, Pyrite, Quartz, Sabugalite, Saléeite, Schoepite, Sklodowskite, Smirnite, Soddyite, Sphalerite, Tellurobismuthite, Tetradymite, Torbernite, Uraninite, Uranophane, Uranopilite, Zippeite

    Mineral   -   > 60% of sites
    Mineral   -   > 50% of sites
    Mineral   -   > 20% of sites
    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found with Chernikovite
    Localities:

    Rare

    Chernikovite Localities
    Notes:

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

    Crystals are probably metamic.