(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: r53589, T = 640 C, P = 19.0 kbar, cell volume = 190.46 ang**3
      _database_code_amcsd 0003381

      CELL PARAMETERS:    5.7535   5.7535   5.7535   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    190.457
      Density (g/cm3):      2.150
      MAX. ABS. INTENSITY / VOLUME**2:      31.66550538    
      RIR:      4.795
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                26.84          4.32        3.3218    1   1   1         8
                31.09        100.00        2.8767    2   0   0         6
                44.54         61.35        2.0342    2   2   0        12
                52.77          1.08        1.7347    3   1   1        24
                55.31         18.42        1.6609    2   2   2         8
                64.82          7.53        1.4384    4   0   0         6
                73.63         18.67        1.2865    4   2   0        24
                82.05         12.84        1.1744    4   2   2        24
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.