(K.5Na.5)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: als2k50, T = 600 C, P = 0.0 kbar, cell volume = 234.43 ang**3
      _database_code_amcsd 0003308

      CELL PARAMETERS:    6.1660   6.1660   6.1660   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    234.429
      Density (g/cm3):      1.884
      MAX. ABS. INTENSITY / VOLUME**2:      29.96643841    
      RIR:      5.180
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                28.96        100.00        3.0830    2   0   0         6
                41.42         63.47        2.1800    2   2   0        12
                51.33         19.49        1.7800    2   2   2         8
                60.01          8.06        1.5415    4   0   0         6
                67.99         20.03        1.3788    4   2   0        24
                75.54         13.63        1.2586    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.