NaMgF3
      Martin C D, Crichton W A, Liu H, Prakapenka V, Chen J, Parise J B
      American Mineralogist 91 (2006) 1703-1706
      Rietveld structure refinement of perovskite and post-perovskite phases of
      NaMgF3 (neighborite) at high pressures
      Locality: synthetic
      Sample: (b), P = 54 GPa
      _database_code_amcsd 0004240

      CELL PARAMETERS:    2.7145   8.3930   6.8512   90.000   90.000   90.000
      SPACE GROUP: Cmcm      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    156.090
      Density (g/cm3):      4.437
      MAX. ABS. INTENSITY / VOLUME**2:      9.349829983    
      RIR:      0.686
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                21.17          4.25        4.1965    0   2   0         2
                26.01          4.64        3.4256    0   0   2         2
                33.78         72.89        2.6537    0   2   2         4
                34.73         17.97        2.5828    1   1   0         4
                43.11          1.03        2.0982    0   4   0         2
                43.90          1.78        2.0623    1   1   2         8
                45.19         10.14        2.0063    0   4   1         4
                45.20         73.33        2.0059    0   2   3         4
                46.62        100.00        1.9482    1   3   0         4
                48.59         99.16        1.8739    1   3   1         8
                51.04          2.89        1.7893    0   4   2         4
                53.50         29.54        1.7128    0   0   4         2
                53.57         50.55        1.7108    1   1   3         8
                54.16         49.70        1.6935    1   3   2         8
                58.17          2.43        1.5858    0   2   4         4
                62.68          9.24        1.4821    1   3   3         8
                65.36          2.91        1.4277    1   5   0         4
                65.38         26.91        1.4274    1   1   4         8
                66.95          7.01        1.3977    1   5   1         8
                68.46          2.77        1.3706    0   6   1         4
                69.22         27.57        1.3572    2   0   0         2
                71.04         11.47        1.3269    0   4   4         4
                71.61         25.01        1.3178    1   5   2         8
                73.07         26.31        1.2950    0   6   2         4
                73.64          7.34        1.2863    1   3   4         8
                79.11          2.49        1.2106    1   5   3         8
                79.28          8.57        1.2084    2   2   2         8
                84.44          1.23        1.1473    0   4   5         4
                84.93          1.64        1.1419    0   0   6         2
                86.59          1.29        1.1242    2   4   1         8
                86.60          9.60        1.1241    2   2   3         8
                86.92         11.81        1.1208    1   3   5         8
                88.80          4.54        1.1018    0   2   6         4
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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.