Gehlenite
      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: O% Ak
      _database_code_amcsd 0007694

      CELL PARAMETERS:    7.6850   7.6850   5.0636   90.000   90.000   90.000
      SPACE GROUP: P-42_1m   
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    299.052
      Density (g/cm3):      3.047
      MAX. ABS. INTENSITY / VOLUME**2:      22.12638250    
      RIR:      2.364
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.31          5.24        5.4341    1   1   0         4
                17.51          3.28        5.0636    0   0   1         2
                21.01          2.49        4.2283    1   0   1         8
                23.15          1.25        3.8425    2   0   0         4
                24.02         17.55        3.7046    1   1   1         4
                25.92          2.49        3.4368    2   1   0         8
                29.17         20.45        3.0610    2   0   1         8
                31.46        100.00        2.8437    2   1   1         8
                32.97          4.94        2.7171    2   2   0         4
                35.46          3.71        2.5318    0   0   2         2
                36.99         16.46        2.4302    3   1   0         8
                37.40          8.18        2.4047    1   0   2         8
                37.57          9.74        2.3942    2   2   1         4
                39.26          4.07        2.2949    1   1   2         4
                39.42          8.78        2.2858    3   0   1         8
                41.20          1.88        2.1909    3   1   1         8
                44.44          9.44        2.0384    2   1   2         8
                46.21          2.43        1.9645    3   2   1         8
                47.31          9.07        1.9212    4   0   0         4
                48.86          3.83        1.8639    4   1   0         8
                49.19          2.42        1.8523    2   2   2         4
                50.38          9.39        1.8114    3   3   0         4
                52.17         24.68        1.7532    3   1   2         8
                52.30          7.11        1.7491    4   1   1         8
                53.31          6.22        1.7184    4   2   0         8
                53.75          2.94        1.7055    3   3   1         4
                56.43          2.27        1.6306    3   2   2         8
                57.14          1.47        1.6119    1   1   3         4
                61.17          8.97        1.5150    2   1   3         8
                63.11          1.98        1.4732    3   3   2         4
                64.51          1.60        1.4445    5   1   1         8
                65.05          3.95        1.4337    2   2   3         4
                65.67          1.80        1.4218    4   2   2         8
                66.32          1.46        1.4094    3   0   3         8
                67.57          2.33        1.3863    3   1   3         8
                68.29         11.42        1.3736    5   2   1         8
                69.15          4.10        1.3585    4   4   0         4
                71.27          1.49        1.3232    3   2   3         8
                71.86          1.25        1.3138    4   3   2         8
                71.96          1.27        1.3121    4   4   1         4
                74.01          3.94        1.2808    6   0   0         4
                75.03          1.35        1.2659    0   0   4         2
                76.08          4.82        1.2511    4   1   3         8
                76.65          1.37        1.2432    5   2   2         8
                77.94          1.65        1.2258    6   1   1         8
                81.45          1.68        1.1816    6   2   1         8
                82.62          2.46        1.1678    5   4   1         8
                84.83          2.27        1.1429    6   0   2         8
                85.43          1.26        1.1364    4   3   3         8
                85.58          1.37        1.1349    3   0   4         8
                86.59          2.48        1.1242    5   1   3         8
                86.73          2.67        1.1227    3   1   4         8
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.