(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: b&w, T = 23 C, P = 0.0 kbar, cell volume = 236.48 ang**3
      _database_code_amcsd 0003233

      CELL PARAMETERS:    6.1839   6.1839   6.1839   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    236.476
      Density (g/cm3):      2.003
      MAX. ABS. INTENSITY / VOLUME**2:      34.11748355    
      RIR:      5.546
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                28.88        100.00        3.0919    2   0   0         6
                41.29         63.12        2.1863    2   2   0        12
                51.17         19.31        1.7851    2   2   2         8
                59.82          7.99        1.5460    4   0   0         6
                67.77         19.86        1.3828    4   2   0        24
                75.29         13.54        1.2623    4   2   2        24
                89.69          3.95        1.0932    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.