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: 100% Ak
      _database_code_amcsd 0007698

      CELL PARAMETERS:    7.8288   7.8288   5.0052   90.000   90.000   90.000
      SPACE GROUP: P-42_1m   
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    306.769
      Density (g/cm3):      2.941
      MAX. ABS. INTENSITY / VOLUME**2:      22.06218547    
      RIR:      2.443
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.01         10.73        5.5358    1   1   0         4
                17.72          1.75        5.0052    0   0   1         2
                21.07          7.76        4.2170    1   0   1         8
                22.72          3.44        3.9144    2   0   0         4
                23.97         10.27        3.7127    1   1   1         4
                25.44          4.59        3.5011    2   1   0         8
                28.96         22.38        3.0834    2   0   1         8
                31.18        100.00        2.8689    2   1   1         8
                32.34          3.58        2.7679    2   2   0         4
                35.88          1.59        2.5026    0   0   2         2
                36.29         15.72        2.4757    3   1   0         8
                37.12          5.05        2.4222    2   2   1         4
                37.74          6.71        2.3838    1   0   2         8
                38.92          6.38        2.3140    3   0   1         8
                39.52          2.99        2.2804    1   1   2         4
                40.66          1.58        2.2191    3   1   1         8
                44.50         11.96        2.0360    2   1   2         8
                45.54          2.38        1.9920    3   2   1         8
                46.39          5.88        1.9572    4   0   0         4
                47.91          6.04        1.8988    4   1   0         8
                49.08          3.93        1.8563    2   2   2         4
                49.39         10.02        1.8453    3   3   0         4
                51.47          8.57        1.7753    4   1   1         8
                51.96         17.99        1.7600    3   1   2         8
                52.26          5.67        1.7506    4   2   0         8
                52.88          2.58        1.7314    3   3   1         4
                55.04          1.08        1.6684    0   0   3         2
                56.08          2.41        1.6401    3   2   2         8
                56.39          1.01        1.6318    1   0   3         8
                57.71          1.66        1.5974    1   1   3         4
                60.30          1.21        1.5348    2   0   3         8
                61.57          3.99        1.5061    2   1   3         8
                62.54          1.28        1.4852    3   3   2         4
                63.36          2.40        1.4678    5   1   1         8
                65.30          4.66        1.4289    2   2   3         4
                66.52          2.79        1.4057    3   0   3         8
                67.04          8.77        1.3961    5   2   1         8
                67.70          2.84        1.3839    4   4   0         4
                70.61          1.71        1.3339    4   4   1         4
                71.01          1.52        1.3274    4   3   2         8
                72.43          2.86        1.3048    6   0   0         4
                73.59          1.15        1.2870    6   1   0         8
                75.92          4.07        1.2533    4   1   3         8
                76.41          1.08        1.2465    6   1   1         8
                77.06          1.80        1.2376    3   3   3         4
                79.82          1.60        1.2016    6   2   1         8
                80.94          2.09        1.1877    5   4   1         8
                83.57          1.66        1.1570    6   0   2         8
                84.94          1.68        1.1417    4   3   3         8
                85.08          1.09        1.1402    2   2   4         4
                86.06          2.33        1.1298    5   1   3         8
                86.20          1.28        1.1283    3   0   4         8
                88.02          1.15        1.1095    6   2   2         8
                89.39          1.00        1.0961    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.