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 = 423 K
      Melilite group
      _database_code_amcsd 0008526

      CELL PARAMETERS:    7.8776   7.8776   5.0153   90.000   90.000   90.000
      SPACE GROUP: P-42_1m   
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    311.232
      Density (g/cm3):      3.060
      MAX. ABS. INTENSITY / VOLUME**2:      21.43963283    
      RIR:      2.281
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                15.91          2.59        5.5703    1   1   0         4
                17.68          6.14        5.0153    0   0   1         2
                21.00          6.96        4.2307    1   0   1         8
                23.87         18.32        3.7272    1   1   1         4
                25.28          4.41        3.5230    2   1   0         8
                28.82         37.15        3.0977    2   0   1         8
                31.02        100.00        2.8828    2   1   1         8
                32.14          6.78        2.7852    2   2   0         4
                35.81          3.43        2.5076    0   0   2         2
                36.05         24.08        2.4911    3   1   0         8
                36.92          5.78        2.4349    2   2   1         4
                37.64          6.44        2.3895    1   0   2         8
                38.71          6.34        2.3263    3   0   1         8
                39.41          2.60        2.2866    1   1   2         4
                40.43          2.65        2.2311    3   1   1         8
                44.34         11.45        2.0430    2   1   2         8
                45.27          1.98        2.0030    3   2   1         8
                46.09          3.53        1.9694    4   0   0         4
                47.59          6.69        1.9106    4   1   0         8
                48.87          6.34        1.8636    2   2   2         4
                49.06          7.25        1.8568    3   3   0         4
                51.16          8.68        1.7854    4   1   1         8
                51.72         23.28        1.7673    3   1   2         8
                51.91          7.76        1.7615    4   2   0         8
                52.56          4.80        1.7413    3   3   1         4
                55.27          2.13        1.6620    4   2   1         8
                55.81          2.33        1.6473    3   2   2         8
                57.56          2.28        1.6012    1   1   3         4
                60.13          2.36        1.5389    2   0   3         8
                60.96          1.03        1.5197    4   1   2         8
                61.38          4.38        1.5103    2   1   3         8
                62.95          4.49        1.4765    5   1   1         8
                64.67          1.84        1.4414    4   2   2         8
                65.07          4.12        1.4334    2   2   3         4
                66.28          2.06        1.4102    3   0   3         8
                66.59          7.93        1.4043    5   2   1         8
                67.23          3.22        1.3926    4   4   0         4
                67.47          1.34        1.3882    3   1   3         8
                69.59          1.17        1.3510    5   3   0         8
                70.13          2.25        1.3418    4   4   1         4
                70.60          1.22        1.3341    4   3   2         8
                71.91          3.17        1.3129    6   0   0         4
                73.06          1.10        1.2951    6   1   0         8
                75.58          3.85        1.2581    4   1   3         8
                75.88          1.21        1.2538    0   0   4         2
                76.71          2.32        1.2424    3   3   3         4
                78.58          1.03        1.2174    4   4   2         4
                79.25          2.53        1.2088    6   2   1         8
                80.36          1.87        1.1948    5   4   1         8
                80.81          1.67        1.1894    5   3   2         8
                83.03          2.34        1.1632    6   0   2         8
                84.50          1.22        1.1466    4   3   3         8
                84.80          1.05        1.1433    2   2   4         4
                85.60          2.54        1.1346    5   1   3         8
                85.90          1.02        1.1315    3   0   4         8
                87.00          1.74        1.1200    3   1   4         8
                88.90          1.10        1.1009    5   2   3         8
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.