(K.2Na.8)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: als7k20, T = 600 C, P = 0.0 kbar, cell volume = 212.03 ang**3
      _database_code_amcsd 0003372

      CELL PARAMETERS:    5.9630   5.9630   5.9630   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    212.029
      Density (g/cm3):      1.931
      MAX. ABS. INTENSITY / VOLUME**2:      28.52761517    
      RIR:      4.809
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                25.88          4.39        3.4427    1   1   1         8
                29.97        100.00        2.9815    2   0   0         6
                42.90         62.72        2.1082    2   2   0        12
                50.78          1.08        1.7979    3   1   1        24
                53.21         19.10        1.7214    2   2   2         8
                62.28          7.86        1.4907    4   0   0         6
                70.64         19.47        1.3334    4   2   0        24
                78.60         13.27        1.2172    4   2   2        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.