Ca2(Mg.55Fe.45)Si2O7
      Kusaka K, Hagiya K, Ohmasa M, Okano Y, Mukai M, Iishi K, Haga N
      Physics and Chemistry of Minerals 28 (2001) 150-166
      Determination of structures of Ca2CoSi2O7, Ca2MgSi2O7, and Ca2(Mg.55Fe.45)Si2O7
      in incommensurate and normal phases and observation of diffuse streaks at high temperature
      Sample: T = 503 K
      Melilite group
      _database_code_amcsd 0008527

      CELL PARAMETERS:    7.8868   7.8868   5.0171   90.000   90.000   90.000
      SPACE GROUP: P-42_1m   
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    312.072
      Density (g/cm3):      3.052
      MAX. ABS. INTENSITY / VOLUME**2:      21.29638509    
      RIR:      2.272
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                15.89          2.53        5.5768    1   1   0         4
                17.68          6.00        5.0171    0   0   1         2
                20.99          7.16        4.2332    1   0   1         8
                23.86         18.42        3.7299    1   1   1         4
                25.25          4.37        3.5271    2   1   0         8
                28.80         36.91        3.1003    2   0   1         8
                30.99        100.00        2.8854    2   1   1         8
                32.10          6.75        2.7884    2   2   0         4
                35.80          3.31        2.5085    0   0   2         2
                36.01         23.87        2.4940    3   1   0         8
                36.88          5.88        2.4373    2   2   1         4
                37.63          6.40        2.3905    1   0   2         8
                38.67          6.38        2.3286    3   0   1         8
                39.39          2.60        2.2878    1   1   2         4
                40.39          2.67        2.2333    3   1   1         8
                44.31         11.54        2.0442    2   1   2         8
                45.22          2.06        2.0051    3   2   1         8
                46.03          3.56        1.9717    4   0   0         4
                47.53          6.64        1.9128    4   1   0         8
                48.83          6.28        1.8649    2   2   2         4
                49.00          7.32        1.8589    3   3   0         4
                51.10          8.63        1.7873    4   1   1         8
                51.68         23.32        1.7687    3   1   2         8
                51.84          7.77        1.7635    4   2   0         8
                52.50          4.73        1.7431    3   3   1         4
                55.21          2.09        1.6638    4   2   1         8
                55.76          2.32        1.6487    3   2   2         8
                57.53          2.27        1.6019    1   1   3         4
                60.09          2.29        1.5396    2   0   3         8
                61.35          4.27        1.5111    2   1   3         8
                62.87          4.34        1.4781    5   1   1         8
                64.60          1.81        1.4427    4   2   2         8
                65.03          4.09        1.4342    2   2   3         4
                66.23          2.11        1.4111    3   0   3         8
                66.51          7.93        1.4059    5   2   1         8
                67.14          3.20        1.3942    4   4   0         4
                67.42          1.28        1.3890    3   1   3         8
                69.50          1.15        1.3526    5   3   0         8
                70.05          2.20        1.3433    4   4   1         4
                70.53          1.22        1.3353    4   3   2         8
                71.82          3.17        1.3145    6   0   0         4
                72.97          1.05        1.2966    6   1   0         8
                75.51          3.76        1.2590    4   1   3         8
                75.85          1.18        1.2543    0   0   4         2
                76.64          2.32        1.2433    3   3   3         4
                78.49          1.00        1.2186    4   4   2         4
                79.14          2.48        1.2102    6   2   1         8
                80.25          1.87        1.1962    5   4   1         8
                80.71          1.60        1.1905    5   3   2         8
                82.92          2.28        1.1643    6   0   2         8
                84.42          1.21        1.1475    4   3   3         8
                84.75          1.03        1.1439    2   2   4         4
                85.52          2.47        1.1355    5   1   3         8
                85.84          1.00        1.1320    3   0   4         8
                86.94          1.64        1.1205    3   1   4         8
                88.81          1.05        1.1018    5   2   3         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.