Leucite
      Palmer D C, Dove M T, Ibberson R M, Powell B M
      American Mineralogist 82 (1997) 16-29
      Structural behavior, crystal chemistry and phase transitions in substituted
      leucites: High-resolution neutron powder diffraction studies
      Sample: Expt. no. 3757, T = 298 K, KFeSi2O6
      _database_code_amcsd 0001854

      CELL PARAMETERS:   13.2036  13.2036  13.9545   90.000   90.000   90.000
      SPACE GROUP: I4_1/a    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   2432.741
      Density (g/cm3):      2.046
      MAX. ABS. INTENSITY / VOLUME**2:      6.093296376    
      RIR:      0.970
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 9.22          6.10        9.5908    1   0   1         8
                13.41          4.21        6.6018    2   0   0         4
                15.86          9.57        5.5890    1   1   2         8
                16.30         12.28        5.4380    2   1   1         8
                16.30         24.68        5.4380    1   2   1         8
                18.50          7.96        4.7954    2   0   2         8
                19.01          1.31        4.6682    2   2   0         4
                20.24          2.21        4.3872    1   0   3         8
                24.36          8.92        3.6539    1   2   3         8
                24.85          4.94        3.5828    3   1   2         8
                24.85          2.99        3.5828    1   3   2         8
                25.14          8.26        3.5421    3   2   1         8
                25.14          2.47        3.5421    2   3   1         8
                25.53         75.12        3.4886    0   0   4         2
                27.01        100.00        3.3009    4   0   0         4
                27.91          3.27        3.1969    3   0   3         8
                28.60          3.21        3.1212    1   4   1         8
                28.60          1.59        3.1212    4   1   1         8
                28.95          5.09        3.0844    2   0   4         8
                29.95          3.52        2.9838    4   0   2         8
                30.27          1.84        2.9524    2   4   0         4
                30.27         29.43        2.9524    4   2   0         4
                31.08         25.18        2.8773    3   2   3         8
                31.08          9.49        2.8773    2   3   3         8
                31.48         18.37        2.8422    3   3   2         8
                32.94          1.62        2.7190    2   4   2         8
                33.47          9.51        2.6771    3   1   4         8
                33.47          2.28        2.6771    1   3   4         8
                37.23          4.25        2.4148    5   2   1         8
                37.51         17.71        2.3977    4   0   4         8
                38.18          4.82        2.3570    3   0   5         8
                38.57          3.61        2.3341    4   4   0         4
                38.78          2.71        2.3223    3   3   4         8
                39.23          2.50        2.2964    5   0   3         8
                40.64          3.28        2.2197    3   2   5         8
                41.15          5.27        2.1936    2   0   6         8
                41.64          3.90        2.1690    5   2   3         8
                41.95         15.27        2.1538    3   5   2         8
                42.13          1.10        2.1449    6   1   1         8
                42.99          1.29        2.1040    1   4   5         8
                43.34          3.34        2.0877    2   6   0         4
                43.53          1.31        2.0793    1   5   4         8
                46.15          1.46        1.9670    1   6   3         8
                46.60          1.13        1.9490    3   6   1         8
                46.83          2.38        1.9399    4   4   4         8
                47.84          2.42        1.9012    4   0   6         8
                48.28          1.22        1.8851    4   5   3         8
                48.89          2.34        1.8630    3   3   6         8
                49.80          2.16        1.8310    4   6   0         4
                49.92          1.09        1.8270    2   4   6         8
                50.34          1.18        1.8127    3   6   3         8
                50.60          1.24        1.8038    5   5   2         8
                50.60          1.01        1.8038    7   1   2         8
                50.76          1.18        1.7985    7   2   1         8
                52.25          2.53        1.7509    3   2   7         8
                52.25          1.87        1.7509    2   3   7         8
                52.34          1.38        1.7480    7   0   3         8
                52.46          1.50        1.7443    0   0   8         2
                54.20          1.94        1.6924    1   4   7         8
                54.29          2.65        1.6897    7   2   3         8
                54.40          1.35        1.6864    2   0   8         8
                54.54          7.56        1.6825    3   7   2         8
                55.85          2.67        1.6463    7   1   4         8
                56.74          1.47        1.6224    3   5   6         8
                57.24          1.29        1.6095    3   1   8         8
                57.56          3.15        1.6012    8   2   0         4
                57.96          1.06        1.5910    5   0   7         8
                59.54          1.47        1.5526    7   3   4         8
                61.87          1.15        1.4997    1   2   9         8
                61.90          1.59        1.4990    7   5   2         8
                61.90          1.21        1.4990    5   7   2         8
                66.87          1.07        1.3991    9   0   3         8
                67.37          3.08        1.3900    3   7   6         8
                67.92          2.36        1.3801    1   1  10         8
                68.56          1.16        1.3687    7   6   3         8
                71.25          1.77        1.3235    3   1  10         8
                71.54          1.12        1.3188    8   2   6         8
                72.23          1.73        1.3080    1  10   1         8
                73.52          1.07        1.2882    4   9   3         8
                75.07          1.46        1.2654    1   8   7         8
                75.14          1.00        1.2643    1  10   3         8
                77.74          1.07        1.2284    5   1  10         8
                80.92          1.67        1.1880    3   5  10         8
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.