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 = 523 K
      Melilite group
      _database_code_amcsd 0008528

      CELL PARAMETERS:    7.8855   7.8855   5.0170   90.000   90.000   90.000
      SPACE GROUP: P-42_1m   
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    311.963
      Density (g/cm3):      3.053
      MAX. ABS. INTENSITY / VOLUME**2:      21.32159499    
      RIR:      2.274
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                15.89          2.52        5.5759    1   1   0         4
                17.68          6.04        5.0170    0   0   1         2
                20.99          7.19        4.2329    1   0   1         8
                23.86         18.37        3.7295    1   1   1         4
                25.25          4.36        3.5265    2   1   0         8
                28.80         36.80        3.1000    2   0   1         8
                31.00        100.00        2.8851    2   1   1         8
                32.11          6.74        2.7879    2   2   0         4
                35.80          3.30        2.5085    0   0   2         2
                36.02         23.78        2.4936    3   1   0         8
                36.88          5.88        2.4370    2   2   1         4
                37.63          6.37        2.3905    1   0   2         8
                38.67          6.38        2.3283    3   0   1         8
                39.39          2.60        2.2877    1   1   2         4
                40.39          2.66        2.2330    3   1   1         8
                44.31         11.51        2.0441    2   1   2         8
                45.23          2.06        2.0048    3   2   1         8
                46.04          3.53        1.9714    4   0   0         4
                47.54          6.61        1.9125    4   1   0         8
                48.84          6.26        1.8648    2   2   2         4
                49.01          7.33        1.8586    3   3   0         4
                51.11          8.63        1.7871    4   1   1         8
                51.69         23.27        1.7685    3   1   2         8
                51.85          7.76        1.7633    4   2   0         8
                52.50          4.69        1.7429    3   3   1         4
                55.22          2.09        1.6635    4   2   1         8
                55.76          2.32        1.6485    3   2   2         8
                57.54          2.27        1.6018    1   1   3         4
                60.10          2.27        1.5396    2   0   3         8
                61.35          4.24        1.5110    2   1   3         8
                62.89          4.30        1.4779    5   1   1         8
                64.61          1.80        1.4425    4   2   2         8
                65.04          4.06        1.4341    2   2   3         4
                66.24          2.11        1.4110    3   0   3         8
                66.52          7.91        1.4057    5   2   1         8
                67.15          3.18        1.3940    4   4   0         4
                67.43          1.27        1.3889    3   1   3         8
                69.51          1.15        1.3524    5   3   0         8
                70.06          2.19        1.3431    4   4   1         4
                70.54          1.22        1.3352    4   3   2         8
                71.83          3.16        1.3142    6   0   0         4
                72.98          1.03        1.2964    6   1   0         8
                75.52          3.75        1.2589    4   1   3         8
                75.85          1.17        1.2543    0   0   4         2
                76.65          2.32        1.2432    3   3   3         4
                79.16          2.47        1.2100    6   2   1         8
                80.27          1.87        1.1960    5   4   1         8
                80.72          1.60        1.1904    5   3   2         8
                82.94          2.27        1.1642    6   0   2         8
                84.43          1.20        1.1474    4   3   3         8
                84.75          1.02        1.1438    2   2   4         4
                85.53          2.46        1.1354    5   1   3         8
                85.85          1.00        1.1320    3   0   4         8
                86.95          1.63        1.1205    3   1   4         8
                88.82          1.04        1.1017    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.