Sylvite
      Walker D, Verma P K, Cranswick L M D, Jones R L, Clark S M, Buhre S
      American Mineralogist 89 (2004) 204-210
      Halite-sylvite thermoelasticity
      Sample: r57689, T = 36 C, P = 0.4 kbar, cell volume = 249.89 ang**3
      _database_code_amcsd 0003202

      CELL PARAMETERS:    6.2987   6.2987   6.2987   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    249.892
      Density (g/cm3):      1.981
      MAX. ABS. INTENSITY / VOLUME**2:      35.24599187    
      RIR:      5.792
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                28.34        100.00        3.1493    2   0   0         6
                40.51         63.56        2.2269    2   2   0        12
                50.17         19.53        1.8183    2   2   2         8
                58.63          8.10        1.5747    4   0   0         6
                66.37         20.17        1.4084    4   2   0        24
                73.68         13.74        1.2857    4   2   2        24
                87.63          3.96        1.1135    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.