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: 25% Ak
      _database_code_amcsd 0007695

      CELL PARAMETERS:    7.7115   7.7115   5.0498   90.000   90.000   90.000
      SPACE GROUP: P-42_1m   
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    300.298
      Density (g/cm3):      3.026
      MAX. ABS. INTENSITY / VOLUME**2:      22.80873183    
      RIR:      2.455
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.26          5.99        5.4529    1   1   0         4
                17.56          2.74        5.0498    0   0   1         2
                21.03          3.20        4.2246    1   0   1         8
                23.07          1.47        3.8558    2   0   0         4
                24.02         15.35        3.7051    1   1   1         4
                25.83          2.57        3.4487    2   1   0         8
                29.14         21.06        3.0646    2   0   1         8
                31.41        100.00        2.8479    2   1   1         8
                32.85          4.58        2.7264    2   2   0         4
                35.56          3.07        2.5249    0   0   2         2
                36.86         16.38        2.4386    3   1   0         8
                37.48          7.71        2.3996    1   0   2         8
                37.49          8.77        2.3991    2   2   1         4
                39.32          3.53        2.2912    1   1   2         4
                39.33          8.91        2.2908    3   0   1         8
                41.10          1.84        2.1959    3   1   1         8
                44.47         10.88        2.0373    2   1   2         8
                46.09          2.52        1.9694    3   2   1         8
                47.14          8.58        1.9279    4   0   0         4
                48.68          4.68        1.8703    4   1   0         8
                49.18          2.61        1.8525    2   2   2         4
                50.19          9.88        1.8176    3   3   0         4
                52.14         24.28        1.7541    3   1   2         8
                52.15          7.58        1.7539    4   1   1         8
                53.11          6.35        1.7243    4   2   0         8
                53.59          3.28        1.7102    3   3   1         4
                56.38          2.35        1.6320    3   2   2         8
                57.28          1.61        1.6084    1   1   3         4
                61.28          8.33        1.5127    2   1   3         8
                63.01          1.87        1.4751    3   3   2         4
                64.30          2.01        1.4488    5   1   1         8
                65.13          4.54        1.4323    2   2   3         4
                65.56          1.60        1.4240    4   2   2         8
                66.38          1.80        1.4082    3   0   3         8
                67.63          1.83        1.3853    3   1   3         8
                68.05         11.73        1.3777    5   2   1         8
                68.88          4.08        1.3632    4   4   0         4
                71.30          1.33        1.3227    3   2   3         8
                71.71          1.33        1.3162    4   3   2         8
                71.71          1.40        1.3161    4   4   1         4
                73.71          4.10        1.2853    6   0   0         4
                75.27          1.52        1.2624    0   0   4         2
                76.07          5.13        1.2512    4   1   3         8
                76.47          1.72        1.2456    5   2   2         8
                77.25          1.41        1.2350    3   3   3         4
                77.65          1.68        1.2296    6   1   1         8
                81.15          1.95        1.1852    6   2   1         8
                82.30          1.07        1.1715    5   3   2         8
                82.31          2.72        1.1715    5   4   1         8
                84.59          1.01        1.1456    2   2   4         4
                84.61          2.34        1.1454    6   0   2         8
                85.37          1.39        1.1371    4   3   3         8
                85.74          1.55        1.1332    3   0   4         8
                86.51          2.75        1.1250    5   1   3         8
                86.89          2.58        1.1211    3   1   4         8
                89.95          2.47        1.0907    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.