Ekanite
      Szymanski J T, Owens D R, Roberts A C, Ansell H G, Chao G Y
      The Canadian Mineralogist 20 (1982) 65-75
      A mineralogical study and crystal-structure determination of
      nonmetamict ekanite, ThCa2Si8O20
      Note: Changed O2-x coordinate to match reported bond lengths
      _database_code_amcsd 0005184

      CELL PARAMETERS:    7.4830   7.4830  14.8930   90.000   90.000   90.000
      SPACE GROUP: I422      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    833.938
      Density (g/cm3):      3.418
      MAX. ABS. INTENSITY / VOLUME**2:      37.76822435    
      RIR:      3.598
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                11.88         50.97        7.4465    0   0   2         2
                13.24         84.33        6.6864    1   0   1         8
                16.76         13.11        5.2913    1   1   0         4
                20.59         17.23        4.3133    1   1   2         8
                21.48        100.00        4.1368    1   0   3         8
                26.66         80.02        3.3432    2   0   2         8
                27.31         77.46        3.2651    2   1   1         8
                29.33          6.67        3.0450    1   1   4         8
                32.26         10.82        2.7749    2   1   3         8
                32.35         16.63        2.7674    1   0   5         8
                33.88         15.42        2.6456    2   2   0         4
                33.97         50.69        2.6392    2   0   4         8
                36.03         10.53        2.4930    2   2   2         8
                36.19          4.88        2.4822    0   0   6         2
                36.53         14.34        2.4601    3   0   1         8
                38.03          4.20        2.3663    3   1   0         8
                39.98          7.56        2.2552    3   1   2         8
                40.13          3.89        2.2472    1   1   6         8
                40.47          2.99        2.2288    3   0   3         8
                40.55         16.18        2.2249    2   1   5         8
                41.89         19.79        2.1566    2   2   4         8
                43.77          9.63        2.0684    2   0   6         8
                44.05         13.40        2.0555    3   2   1         8
                44.26          1.04        2.0465    1   0   7         8
                45.41          9.86        1.9971    3   1   4         8
                47.48         19.37        1.9148    3   2   3         8
                47.55          6.54        1.9124    3   0   5         8
                48.67          9.99        1.8707    4   0   0         4
                48.93          5.42        1.8616    0   0   8         2
                50.29          5.82        1.8144    4   0   2         8
                50.41         11.49        1.8102    2   2   6         8
                50.67          9.22        1.8016    4   1   1         8
                50.86         20.20        1.7954    2   1   7         8
                52.08          1.79        1.7561    1   1   8         8
                53.38          1.88        1.7163    3   3   2         8
                53.50          2.57        1.7127    3   1   6         8
                53.78         13.16        1.7046    4   1   3         8
                53.84          5.07        1.7028    3   2   5         8
                54.87          8.17        1.6732    4   2   0         8
                54.93          2.93        1.6716    4   0   4         8
                55.10          2.80        1.6667    2   0   8         8
                56.36         14.37        1.6325    4   2   2         8
                56.88          6.40        1.6187    3   0   7         8
                57.00          2.70        1.6157    1   0   9         8
                59.66          5.94        1.5499    4   1   5         8
                60.68          4.99        1.5262    4   2   4         8
                60.84          4.37        1.5225    2   2   8         8
                62.13          4.13        1.4940    4   0   6         8
                62.36          6.23        1.4891    4   3   1         8
                62.52          1.29        1.4856    3   2   7         8
                62.63          4.57        1.4833    2   1   9         8
                63.38          1.01        1.4675    5   1   0         8
                63.59          3.43        1.4631    3   1   8         8
                64.74          4.13        1.4398    5   1   2         8
                64.85          1.33        1.4378    3   3   6         8
                65.10          1.67        1.4329    4   3   3         8
                65.10          3.14        1.4329    5   0   3         8
                67.51          4.63        1.3874    4   2   6         8
                67.72          6.99        1.3837    2   0  10         8
                67.73          6.08        1.3835    5   2   1         8
                68.76          2.28        1.3653    5   1   4         8
                70.36          1.93        1.3381    5   2   3         8
                70.41          4.32        1.3373    4   3   5         8
                70.41          2.17        1.3373    5   0   5         8
                70.71          2.82        1.3323    1   0  11         8
                71.50          3.97        1.3196    4   0   8         8
                72.59          1.96        1.3024    4   4   2         8
                73.14          4.49        1.2939    3   2   9         8
                75.12          2.40        1.2647    5   3   2         8
                75.22          2.43        1.2633    5   1   6         8
                75.41          1.32        1.2604    3   1  10         8
                75.50          1.89        1.2593    5   2   5         8
                75.79          1.48        1.2551    2   1  11         8
                76.41          3.41        1.2465    4   4   4         8
                76.56          3.20        1.2445    4   2   8         8
                77.62          1.48        1.2300    6   0   2         8
                77.92          2.75        1.2260    6   1   1         8
                78.07          4.39        1.2241    4   3   7         8
                78.17          2.78        1.2228    4   1   9         8
                78.90          1.54        1.2133    5   3   4         8
                80.42          1.21        1.1941    6   1   3         8
                81.32          1.04        1.1832    6   2   0         8
                81.37          2.29        1.1826    6   0   4         8
                82.56          3.37        1.1685    6   2   2         8
                82.66          1.27        1.1674    4   4   6         8
                82.86          1.43        1.1651    5   4   1         8
                83.00          2.23        1.1634    5   2   7         8
                83.97          2.10        1.1525    5   1   8         8
                85.10          1.07        1.1400    5   3   6         8
                85.33          2.41        1.1376    5   4   3         8
                85.38          1.72        1.1370    6   1   5         8
                85.66          3.17        1.1340    3   2  11         8
                86.26          3.79        1.1276    6   2   4         8
                86.65          2.03        1.1236    2   2  12         8
                87.54          1.82        1.1144    6   0   6         8
                87.73          3.02        1.1125    4   2  10         8
                87.74          1.22        1.1124    6   3   1         8
                87.98          1.36        1.1100    4   3   9         8
                89.08          1.10        1.0991    3   1  12         8
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.