C38H18
      Marsh R E, Herbstein F H
      Acta Crystallographica B44 (1988) 77-88
      More space group changes
      _database_code_amcsd 0009815

      CELL PARAMETERS:   31.2760   3.7818  21.6630   90.000  124.220   90.000
      SPACE GROUP: P2_1/a    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   2118.718
      Density (g/cm3):      1.487
      MAX. ABS. INTENSITY / VOLUME**2:      3.123882783    
      RIR:      0.684
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                 5.76         54.69       15.3549   -2   0   1         2
                 6.84          3.95       12.9308    2   0   0         2
                 8.26          5.54       10.6995   -2   0   2         2
                 9.88         98.10        8.9564    0   0   2         2
                10.45        100.00        8.4658    2   0   1         2
                11.53         27.51        7.6775   -4   0   2         2
                11.65          2.82        7.5968   -4   0   1         2
                12.35         11.49        7.1681   -2   0   3         2
                13.38          5.51        6.6174   -4   0   3         2
                14.84          7.80        5.9709    0   0   3         2
                17.00          3.55        5.2163    4   0   1         2
                17.09          2.81        5.1878   -6   0   2         2
                17.33          5.39        5.1183   -6   0   3         2
                18.26          6.85        4.8579   -6   0   1         2
                19.57          8.68        4.5362    2   0   3         2
                19.83          1.50        4.4782    0   0   4         2
                20.61          3.16        4.3103    6   0   0         2
                20.99          2.02        4.2329    4   0   2         2
                21.57          3.23        4.1204   -6   0   5         2
                21.70          3.87        4.0956   -2   0   5         2
                23.78         14.22        3.7420    1   1   0         4
                23.89         15.26        3.7241   -1   1   1         4
                24.24         71.15        3.6721   -2   1   1         4
                24.70         14.27        3.6047    1   1   1         4
                24.85          4.54        3.5826    0   0   5         2
                24.97          2.73        3.5656   -2   1   2         4
                25.03          1.12        3.5573   -1   1   2         4
                25.06          2.47        3.5531   -3   1   1         4
                25.09          2.02        3.5492   -8   0   1         2
                25.39         18.44        3.5077   -3   1   2         4
                25.72         27.76        3.4632    3   1   0         4
                25.80         38.96        3.4529    2   1   1         4
                26.27         11.48        3.3925   -4   1   2         4
                26.55         11.77        3.3570    1   1   2         4
                26.65          1.09        3.3448   -2   1   3         4
                26.68         10.54        3.3412   -3   1   3         4
                26.95          1.11        3.3087   -8   0   6         2
                27.07          1.22        3.2937   -1   1   3         4
                27.16          1.14        3.2834   -4   1   3         4
                27.31         15.77        3.2655    3   1   1         4
                27.32         15.09        3.2644    4   1   0         4
                27.56          2.51        3.2362   -5   1   2         4
                27.94          7.93        3.1931    2   1   2         4
                28.07          8.67        3.1793   -5   1   3         4
                28.81          1.06        3.0993   -3   1   4         4
                29.17          2.08        3.0618    4   1   1         4
                29.25          5.73        3.0528    5   1   0         4
                29.68          4.24        3.0095    3   1   2         4
                30.36          2.41        2.9445   -6   1   4         4
                31.73          1.00        2.8202    4   1   2         4
                35.07          1.68        2.5590    0   0   7         2
                38.37          1.28        2.3461  -12   0   8         2
                41.36          1.49        2.1828  -11   1   2         4
                42.66          1.29        2.1194    0   1   7         4
                42.99          1.27        2.1041  -12   1   3         4
                43.95          5.90        2.0602  -12   0  10         2
                44.14          4.63        2.0518  -14   0   2         2
                44.79          5.60        2.0233    2   0   8         2
                45.67          1.96        1.9867  -10   1   9         4
                46.22          2.03        1.9642  -12   1   1         4
                50.18          1.02        1.8181   -4   2   3         4
                54.37          1.27        1.6874    6   2   1         4
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.