(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: r56401, T = 550 C, P = 24.5 kbar, cell volume = 185.89 ang**3
      _database_code_amcsd 0003368

      CELL PARAMETERS:    5.7071   5.7071   5.7071   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    185.886
      Density (g/cm3):      2.203
      MAX. ABS. INTENSITY / VOLUME**2:      32.41373765    
      RIR:      4.791
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                27.06          4.30        3.2950    1   1   1         8
                31.35        100.00        2.8535    2   0   0         6
                44.92         61.04        2.0178    2   2   0        12
                53.23          1.08        1.7208    3   1   1        24
                55.80         18.27        1.6475    2   2   2         8
                65.41          7.46        1.4268    4   0   0         6
                74.33         18.50        1.2761    4   2   0        24
                82.87         12.76        1.1650    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.