Neighborite
      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 studied by neutron diffraction, x = .5
      One of two alternative models
      _database_code_amcsd 0008543

      CELL PARAMETERS:    5.5660   5.5660   3.9530   90.000   90.000   90.000
      SPACE GROUP: P4/mbm    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    122.465
      Density (g/cm3):      3.046
      MAX. ABS. INTENSITY / VOLUME**2:      11.89914739    
      RIR:      1.272
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                22.49          6.17        3.9530    0   0   1         2
                22.59         11.94        3.9358    1   1   0         4
                32.09         77.30        2.7891    1   1   1         8
                32.16         39.22        2.7830    2   0   0         4
                39.60         92.17        2.2756    2   0   1         8
                45.91         51.31        1.9765    0   0   2         2
                46.13        100.00        1.9679    2   2   0         4
                51.76          2.32        1.7663    1   1   2         8
                51.90          2.20        1.7617    2   2   1         8
                51.95          2.45        1.7601    3   1   0         8
                57.16         15.38        1.6114    2   0   2         8
                57.30         30.73        1.6079    3   1   1        16
                67.12         45.93        1.3945    2   2   2         8
                67.29         22.55        1.3915    4   0   0         4
                71.82          1.77        1.3145    3   1   2        16
                76.19          6.37        1.2495    1   1   3         8
                76.51          6.10        1.2451    3   3   1         8
                76.55          6.55        1.2446    4   2   0         8
                80.68          2.64        1.1909    2   0   3         8
                80.99          4.95        1.1871    4   2   1        16
                85.30         18.34        1.1378    4   0   2         8
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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.