(K.8Na.2)Cl
      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: als11k80, T = 300 C, P = 0.0 kbar, cell volume = 244.34 ang**3
      _database_code_amcsd 0003234

      CELL PARAMETERS:    6.2517   6.2517   6.2517   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    244.340
      Density (g/cm3):      1.939
      MAX. ABS. INTENSITY / VOLUME**2:      33.02875145    
      RIR:      5.547
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                28.56        100.00        3.1258    2   0   0         6
                40.83         63.54        2.2103    2   2   0        12
                50.58         19.52        1.8047    2   2   2         8
                59.11          8.09        1.5629    4   0   0         6
                66.94         20.13        1.3979    4   2   0        24
                74.33         13.70        1.2761    4   2   2        24
                88.46          3.96        1.1052    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.