(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: als4k80, T = 650 C, P = 0.0 kbar, cell volume = 258.64 ang**3
      _database_code_amcsd 0003260

      CELL PARAMETERS:    6.3714   6.3714   6.3714   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    258.645
      Density (g/cm3):      1.832
      MAX. ABS. INTENSITY / VOLUME**2:      31.20403430    
      RIR:      5.548
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                28.01        100.00        3.1857    2   0   0         6
                40.03         64.27        2.2526    2   2   0        12
                49.56         19.89        1.8393    2   2   2         8
                57.89          8.28        1.5928    4   0   0         6
                65.52         20.62        1.4247    4   2   0        24
                72.71         14.01        1.3006    4   2   2        24
                86.39          3.99        1.1263    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.