(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: r55613, T = 600 C, P = 7.5 kbar, cell volume = 241.43 ang**3
      _database_code_amcsd 0003255

      CELL PARAMETERS:    6.2268   6.2268   6.2268   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    241.432
      Density (g/cm3):      1.962
      MAX. ABS. INTENSITY / VOLUME**2:      33.42382073    
      RIR:      5.547
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                28.67        100.00        3.1134    2   0   0         6
                41.00         63.39        2.2015    2   2   0        12
                50.79         19.45        1.7975    2   2   2         8
                59.37          8.05        1.5567    4   0   0         6
                67.24         20.03        1.3924    4   2   0        24
                74.68         13.64        1.2710    4   2   2        24
                88.91          3.95        1.1008    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.