Akermanite
      Swainson I P, Dove M T, Schmahl W W, Putnis A
      Physics and Chemistry of Minerals 19 (1992) 185-195
      Neutron powder diffraction study of the akermanite-gehlenite
      solid solution series
      Sample: 50% Ak
      _database_code_amcsd 0007696

      CELL PARAMETERS:    7.7475   7.7475   5.0359   90.000   90.000   90.000
      SPACE GROUP: P-42_1m   
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    302.274
      Density (g/cm3):      2.996
      MAX. ABS. INTENSITY / VOLUME**2:      21.92243080    
      RIR:      2.382
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.18          7.48        5.4783    1   1   0         4
                17.61          2.46        5.0359    0   0   1         2
                21.04          4.57        4.2223    1   0   1         8
                22.96          1.91        3.8737    2   0   0         4
                24.00         14.65        3.7075    1   1   1         4
                25.71          3.04        3.4648    2   1   0         8
                29.08         21.00        3.0704    2   0   1         8
                31.34        100.00        2.8544    2   1   1         8
                32.69          4.21        2.7392    2   2   0         4
                35.66          2.51        2.5180    0   0   2         2
                36.68         16.51        2.4500    3   1   0         8
                37.37          7.01        2.4062    2   2   1         4
                37.56          7.48        2.3947    1   0   2         8
                39.20          7.66        2.2980    3   0   1         8
                39.38          3.16        2.2879    1   1   2         4
                40.97          1.60        2.2031    3   1   1         8
                44.48         11.24        2.0369    2   1   2         8
                45.92          2.44        1.9764    3   2   1         8
                46.91          7.11        1.9369    4   0   0         4
                48.44          4.63        1.8790    4   1   0         8
                49.15          2.92        1.8537    2   2   2         4
                49.94          9.17        1.8261    3   3   0         4
                51.94          7.41        1.7605    4   1   1         8
                52.08         21.39        1.7559    3   1   2         8
                52.85          6.18        1.7324    4   2   0         8
                53.37          2.98        1.7167    3   3   1         4
                56.28          2.09        1.6345    3   2   2         8
                57.41          1.76        1.6050    1   1   3         4
                60.07          1.09        1.5402    2   0   3         8
                61.37          5.87        1.5107    2   1   3         8
                62.87          1.42        1.4783    3   3   2         4
                64.01          2.04        1.4546    5   1   1         8
                65.18          4.35        1.4313    2   2   3         4
                65.39          1.34        1.4272    4   2   2         8
                66.43          1.91        1.4074    3   0   3         8
                67.66          1.23        1.3848    3   1   3         8
                67.74          9.78        1.3833    5   2   1         8
                68.51          3.32        1.3696    4   4   0         4
                71.37          1.33        1.3216    4   4   1         4
                71.49          1.27        1.3196    4   3   2         8
                73.32          3.38        1.2912    6   0   0         4
                75.52          1.15        1.2590    0   0   4         2
                76.02          3.95        1.2519    4   1   3         8
                76.22          1.25        1.2492    5   2   2         8
                77.19          1.49        1.2358    3   3   3         4
                77.27          1.34        1.2348    6   1   1         8
                80.73          1.63        1.1903    6   2   1         8
                81.88          2.20        1.1765    5   4   1         8
                84.28          1.93        1.1490    6   0   2         8
                85.23          1.24        1.1386    4   3   3         8
                85.88          1.32        1.1317    3   0   4         8
                86.37          2.31        1.1265    5   1   3         8
                87.02          1.70        1.1198    3   1   4         8
                89.78          1.58        1.0924    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.