Sayrite

 IMA-A 1982-050
Uranium 5.9.6.1
(Dana Classification Number)
(No Images) 4/H.07-40
(Strunz ID)

Property Data Remarks
Named for: David Sayre, American crystallographer known for his work on the structure of numerous chemical components.
Alternate
    Name(s):
  		•  
    Mineral Class:
    Oxides
      Uranyl ([UO2]2+) hydroxides and hydrates
        Fourmarierite - Masuyite series
    		 
    Chemical
        Formula:    		 Pb2(UO2)5O6(OH)2 · 4H2O  
    Chemical
        Composition:
    Hydrogen: (H) 0.51%
    Lead: (Pb) 21.07%
    Oxygen: (O) 17.90%
    Uranium: (U) 60.52%
    		by weight
    Molecular
        Weight:    		 1,966.61 daltons (amu)
    Specific
        Radioactivity:

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

    Specific Activity Dose Rate
    Becquerels Curies milliRems/hour microSieverts/hour
    1.08326 × 1005 2.93 × 10-06 1.40 139.70

    Estimated Average Annual Exposure: 360 mRem (3.6 milliSieverts)
    Crystalography:
    System: Monoclinic - Prismatic
    Axial Ratios: a: 1.5379
    b: 1
    c: 2.088
    Cell Dimensions: a: 10.704 Å
    b: 6.96 Å
    c: 14.533 Å
    Z: 2
    b: 116.81°
    V: 966.32 Å3
    DenCalc: 6.76
    H-M Symbol: 2/m
    Space Group: P21/c
    X-Ray Diffraction:
      By Intensity ( I/Io )    		 (1): 3.113 Å
    (0.9): 3.512 Å
    (0.8): 7.01 Å
    		 
    Habit:
  		•  
    Cleavage:
    [102] Distinct
    		 
    Fracture:    
    Moh's
        Hardness:    		    
    Density: 6.76 grams/cm3
    Color: Yellow-orange, Red-orange  
    Streak:    
    Luster:    
    Diaphaneity:    
    Pleochroism:
    (x):  
    (y:)  
    (z:)  
    		 
    Ultra Violet
        Fluorescence:
    Long Wave:  
    Short Wave:  
    		 
    Magnetism: Non-magnetic  
    Occurance:
  		•  
    Associated
        Minerals:

    Barite, Becquerelite, Bijvoetite-(Y), Billietite, Calcite, Carrollite, Cattierite, Chernikovite, Cobaltoan Calcite, Comblainite, Cousinite, Cuprosklodowskite, Curienite, Curite, Dewindtite, Dumontite, Fourmarierite, Guilleminite, Gysinite-(Nd), Ianthinite, Kasolite, Lepersonnite-(Gd), Liebigite, Masuyite, Metaschoepite, Metastudtite, Metatorbernite, Metavandendriesscheite, Oursinite, Paraschoepite, Parsonsite, Phosphuranylite, Phurcalite, Piretite, Platinum, Protasite, Richetite, Roubaultite, Rutherfordine, Saléeite, Schmitterite, Schoepite, Sengierite, Sharpite, Sklodowskite, Soddyite, Studtite, Torbernite, Umohoite, Urancalcarite, Uraninite, Uranophane, Vaesite, Vandenbrandeite, Vandendriesscheite, Wolsendorfite, Wyartite, Zippeite

    Minerals   -   Uranium & Thorium
    mineral links

    		These are minerals known to be found with Sayrite
    Locations:

    Extremely rare

    Sayrite Locations
    Notes:

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

    Crystals are probably metamic.