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 = 383 K
      Melilite group
      _database_code_amcsd 0008525

      CELL PARAMETERS:    7.8743   7.8743   5.0155   90.000   90.000   90.000
      SPACE GROUP: P-42_1m   
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    310.984
      Density (g/cm3):      3.063
      MAX. ABS. INTENSITY / VOLUME**2:      21.44522969    
      RIR:      2.280
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                15.92          2.61        5.5680    1   1   0         4
                17.68          6.14        5.0155    0   0   1         2
                21.00          6.90        4.2303    1   0   1         8
                23.88         18.15        3.7266    1   1   1         4
                25.29          4.45        3.5215    2   1   0         8
                28.83         37.44        3.0969    2   0   1         8
                31.03        100.00        2.8820    2   1   1         8
                32.15          6.71        2.7840    2   2   0         4
                35.81          3.46        2.5078    0   0   2         2
                36.07         24.29        2.4901    3   1   0         8
                36.93          5.82        2.4341    2   2   1         4
                37.64          6.47        2.3895    1   0   2         8
                38.72          6.43        2.3256    3   0   1         8
                39.41          2.61        2.2865    1   1   2         4
                40.44          2.63        2.2303    3   1   1         8
                44.35         11.50        2.0427    2   1   2         8
                45.29          1.96        2.0023    3   2   1         8
                46.11          3.50        1.9686    4   0   0         4
                47.62          6.74        1.9098    4   1   0         8
                48.88          6.49        1.8633    2   2   2         4
                49.08          7.32        1.8560    3   3   0         4
                51.18          8.73        1.7848    4   1   1         8
                51.74         23.24        1.7670    3   1   2         8
                51.93          7.74        1.7607    4   2   0         8
                52.58          4.82        1.7406    3   3   1         4
                55.30          2.15        1.6613    4   2   1         8
                55.82          2.32        1.6469    3   2   2         8
                57.56          2.29        1.6012    1   1   3         4
                60.13          2.38        1.5388    2   0   3         8
                60.98          1.03        1.5194    4   1   2         8
                61.39          4.46        1.5103    2   1   3         8
                62.98          4.55        1.4759    5   1   1         8
                64.69          1.89        1.4410    4   2   2         8
                65.08          4.16        1.4333    2   2   3         4
                66.28          2.09        1.4101    3   0   3         8
                66.62          7.92        1.4038    5   2   1         8
                67.26          3.26        1.3920    4   4   0         4
                67.48          1.37        1.3880    3   1   3         8
                69.62          1.18        1.3504    5   3   0         8
                70.17          2.28        1.3413    4   4   1         4
                70.63          1.23        1.3337    4   3   2         8
                71.95          3.19        1.3124    6   0   0         4
                73.10          1.11        1.2945    6   1   0         8
                75.59          3.89        1.2579    4   1   3         8
                75.88          1.23        1.2539    0   0   4         2
                76.72          2.33        1.2422    3   3   3         4
                78.61          1.03        1.2171    4   4   2         4
                79.28          2.56        1.2084    6   2   1         8
                80.40          1.87        1.1944    5   4   1         8
                80.84          1.70        1.1890    5   3   2         8
                83.06          2.37        1.1628    6   0   2         8
                84.52          1.25        1.1463    4   3   3         8
                84.80          1.05        1.1433    2   2   4         4
                85.62          2.59        1.1344    5   1   3         8
                85.90          1.01        1.1314    3   0   4         8
                87.00          1.79        1.1199    3   1   4         8
                88.92          1.12        1.1006    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.