Na.44K.56MgF3
      Chakhmouradian A R, Ross K, Mitchell R H, Swainson I
      Physics and Chemistry of Minerals 28 (2001) 277-284
      The crystal chemistry of synthetic potassium-bearing neighborite, (Na1-xKx)MgF3
      Sample x = .56
      _database_code_amcsd 0008545

      CELL PARAMETERS:    3.9494   3.9492   3.9492   90.000   90.000   90.000
      SPACE GROUP: Pm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     61.596
      Density (g/cm3):      3.054
      MAX. ABS. INTENSITY / VOLUME**2:      18.39935383    
      RIR:      1.962
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                22.51         10.10        3.9492    1   0   0         6
                32.05         70.58        2.7926    1   1   0        12
                39.52         69.49        2.2801    1   1   1         8
                45.96        100.00        1.9746    2   0   0         6
                51.76          3.71        1.7662    2   1   0        24
                57.13         22.63        1.6123    2   1   1        24
                67.03         44.81        1.3963    2   2   0        12
                71.69          1.17        1.3164    2   2   1        24
                76.24          7.99        1.2489    3   1   0        24
                80.69          9.56        1.1908    3   1   1        24
                85.10         11.70        1.1401    2   2   2         8
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.