O Sr
      Primak W, Kaufman H, Ward R
      Journal of the American Chemical Society 70 (1948) 2043-2046
      X-Ray Diffraction Studies of Systems Involved in the Preparation of
      Alkaline Earth Sulfide and Selenide Phosphors
      _cod_database_code 1100027
      _database_code_amcsd 0018224

      CELL PARAMETERS:    5.1396   5.1396   5.1396   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    135.765
      Density (g/cm3):      5.069
      MAX. ABS. INTENSITY / VOLUME**2:      117.7347774    
      RIR:      7.563
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                30.12         91.56        2.9673    1   1   1         8
                34.91        100.00        2.5698    2   0   0         6
                50.21         60.32        1.8171    2   2   0        12
                59.67         33.48        1.5496    3   1   1        24
                62.61         17.74        1.4837    2   2   2         8
                73.74          7.21        1.2849    4   0   0         6
                81.66         11.45        1.1791    3   3   1        24
                84.26         18.26        1.1492    4   2   0        24
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       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.