Sylvite
      Ahtee M
      Annales Academiae Scientiarum Fennicae Series A6: Physica 313 (1969) 1-11
      Lattice constants of some binary alkali halide solid solutions.
      _database_code_amcsd 0011994

      CELL PARAMETERS:    6.2788   6.2788   6.2788   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    247.531
      Density (g/cm3):      2.000
      MAX. ABS. INTENSITY / VOLUME**2:      35.58025592    
      RIR:      5.792
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                28.43        100.00        3.1394    2   0   0         6
                40.64         63.44        2.2199    2   2   0        12
                50.34         19.47        1.8125    2   2   2         8
                58.83          8.07        1.5697    4   0   0         6
                66.61         20.09        1.4040    4   2   0        24
                73.96         13.69        1.2817    4   2   2        24
                87.98          3.96        1.1099    4   4   0        12
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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.