Akermanite
      Warren B
      Zeitschrift fur Kristallographie 74 (1930) 131-138
      The structure of melitite (Ca,Na)2(Mg,Al)(Si,Al)2O7
      _cod_database_code 1010215
      _database_code_amcsd 0017151

      CELL PARAMETERS:    7.7300   7.7300   5.0100   90.000   90.000   90.000
      SPACE GROUP: P-42_1m   
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    299.362
      Density (g/cm3):      3.024
      MAX. ABS. INTENSITY / VOLUME**2:      23.71655154    
      RIR:      2.554
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.22          7.13        5.4659    1   1   0         4
                17.70          4.08        5.0100    0   0   1         2
                21.13          4.11        4.2042    1   0   1         8
                23.01          2.75        3.8650    2   0   0         4
                24.10         11.00        3.6933    1   1   1         4
                25.77          3.81        3.4570    2   1   0         8
                29.18         23.18        3.0602    2   0   1         8
                31.44        100.00        2.8453    2   1   1         8
                32.77          4.23        2.7330    2   2   0         4
                35.85          2.86        2.5050    0   0   2         2
                36.77         14.67        2.4444    3   1   0         8
                37.49          6.48        2.3992    2   2   1         4
                37.75          6.48        2.3830    1   0   2         8
                39.32          9.02        2.2914    3   0   1         8
                39.57          2.57        2.2772    1   1   2         4
                41.09          1.23        2.1969    3   1   1         8
                43.03          1.46        2.1021    2   0   2         8
                44.67          9.89        2.0284    2   1   2         8
                46.05          1.71        1.9710    3   2   1         8
                47.02          5.60        1.9325    4   0   0         4
                48.56          6.77        1.8748    4   1   0         8
                49.35          3.10        1.8466    2   2   2         4
                50.06          9.98        1.8220    3   3   0         4
                52.09          8.27        1.7559    4   1   1         8
                52.29         20.25        1.7495    3   1   2         8
                52.98          5.26        1.7285    4   2   0         8
                53.52          2.80        1.7123    3   3   1         4
                54.98          1.04        1.6700    0   0   3         2
                56.50          2.79        1.6288    3   2   2         8
                57.72          1.61        1.5971    1   1   3         4
                60.38          1.31        1.5330    2   0   3         8
                61.68          5.92        1.5037    2   1   3         8
                61.81          1.07        1.5010    4   1   2         8
                63.09          1.40        1.4735    3   3   2         4
                64.19          2.91        1.4510    5   1   1         8
                64.97          1.21        1.4354    5   2   0         8
                65.50          3.81        1.4250    2   2   3         4
                66.75          1.75        1.4014    3   0   3         8
                67.93          9.27        1.3799    5   2   1         8
                67.98          1.59        1.3789    3   1   3         8
                68.69          2.94        1.3665    4   4   0         4
                71.57          1.94        1.3183    4   4   1         4
                71.74          1.12        1.3156    4   3   2         8
                73.51          3.26        1.2883    6   0   0         4
                74.69          1.16        1.2708    6   1   0         8
                75.98          1.25        1.2525    0   0   4         2
                76.37          5.53        1.2470    4   1   3         8
                77.54          1.53        1.2311    3   3   3         4
                80.97          2.07        1.1874    6   2   1         8
                82.12          2.26        1.1736    5   4   1         8
                82.29          1.46        1.1717    5   3   2         8
                84.58          1.93        1.1457    6   0   2         8
                85.23          1.20        1.1386    2   2   4         4
                85.61          1.09        1.1345    4   3   3         8
                86.37          1.67        1.1265    3   0   4         8
                86.76          2.44        1.1225    5   1   3         8
                87.51          2.03        1.1147    3   1   4         8
                89.15          1.08        1.0984    6   2   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.