Akermanite
      Merlini M, Gemmi M, Hanfland M, Crichton W
      American Mineralogist 94 (2009) 704-709
      High-pressure behavior of akermanite and gehlenite and phase stability
      of the normal structures in melelites
      Note: P = 5 GPa
      Locality: synthetic
      _database_code_amcsd 0004933

      CELL PARAMETERS:    7.7400   7.7400   4.9320   90.000   90.000   90.000
      SPACE GROUP: P-42_1m   
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    295.464
      Density (g/cm3):      3.064
      MAX. ABS. INTENSITY / VOLUME**2:      23.19816059    
      RIR:      2.465
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.20          8.88        5.4730    1   1   0         4
                17.99          1.02        4.9320    0   0   1         2
                21.36          7.48        4.1593    1   0   1         8
                22.98          3.01        3.8700    2   0   0         4
                24.29         11.93        3.6638    1   1   1         4
                25.74          4.13        3.4614    2   1   0         8
                29.33         20.65        3.0446    2   0   1         8
                31.58        100.00        2.8333    2   1   1         8
                32.73          3.70        2.7365    2   2   0         4
                36.43          1.39        2.4660    0   0   2         2
                36.72         16.68        2.4476    3   1   0         8
                37.59          6.08        2.3929    2   2   1         4
                38.31          5.93        2.3496    1   0   2         8
                39.42          8.22        2.2861    3   0   1         8
                40.11          2.60        2.2483    1   1   2         4
                41.17          1.85        2.1925    3   1   1         8
                45.14         12.94        2.0084    2   1   2         8
                46.12          2.62        1.9683    3   2   1         8
                46.96          6.23        1.9350    4   0   0         4
                48.49          5.72        1.8772    4   1   0         8
                49.77          3.81        1.8319    2   2   2         4
                49.99         11.00        1.8243    3   3   0         4
                52.13          9.29        1.7544    4   1   1         8
                52.69         21.32        1.7372    3   1   2         8
                52.90          6.47        1.7307    4   2   0         8
                53.56          3.16        1.7110    3   3   1         4
                56.87          2.34        1.6191    3   2   2         8
                58.63          1.67        1.5745    1   1   3         4
                61.26          1.25        1.5131    2   0   3         8
                62.55          5.16        1.4850    2   1   3         8
                63.42          1.17        1.4666    3   3   2         4
                64.20          2.44        1.4508    5   1   1         8
                66.33          5.08        1.4092    2   2   3         4
                67.56          3.20        1.3864    3   0   3         8
                67.93          9.84        1.3799    5   2   1         8
                68.59          3.15        1.3683    4   4   0         4
                71.57          1.62        1.3185    4   4   1         4
                72.03          1.46        1.3111    4   3   2         8
                73.40          3.63        1.2900    6   0   0         4
                76.75          1.57        1.2418    5   2   2         8
                77.12          4.46        1.2368    4   1   3         8
                77.40          1.45        1.2330    0   0   4         2
                77.47          1.29        1.2321    6   1   1         8
                78.28          1.96        1.2213    3   3   3         4
                80.94          1.77        1.1878    6   2   1         8
                82.09          2.62        1.1740    5   4   1         8
                82.53          1.07        1.1688    5   3   2         8
                84.82          1.96        1.1430    6   0   2         8
                86.32          1.48        1.1270    4   3   3         8
                87.46          2.67        1.1153    5   1   3         8
                87.73          1.37        1.1125    3   0   4         8
                88.87          1.09        1.1012    3   1   4         8
                89.38          1.18        1.0962    6   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.