Downeyite
      Stahl K, Legros J P, Galy J
      Zeitschrift fur Kristallographie 202 (1992) 99-107
      The crystal structure of SeO2 at 139 and 286 K
      Note: T = 286 K
      Locality: synthetic
      _database_code_amcsd 0011028

      CELL PARAMETERS:    8.3622   8.3622   5.0612   90.000   90.000   90.000
      SPACE GROUP: P4_2/mbc  
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    353.911
      Density (g/cm3):      4.164
      MAX. ABS. INTENSITY / VOLUME**2:      55.69744273    
      RIR:      4.355
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                14.98         11.85        5.9130    1   1   0         4
                21.25         48.94        4.1811    2   0   0         4
                23.79         53.74        3.7397    2   1   0         8
                27.67         52.90        3.2234    2   0   1         8
                29.70        100.00        3.0077    2   1   1        16
                33.90          8.73        2.6444    3   1   0         8
                35.47         23.35        2.5306    0   0   2         2
                38.41          8.52        2.3437    3   1   1        16
                38.70          8.03        2.3265    1   1   2         8
                38.83          7.39        2.3193    3   2   0         8
                41.72         11.46        2.1649    2   0   2         8
                42.89          8.38        2.1084    3   2   1        16
                43.16          1.75        2.0958    2   1   2        16
                43.28          4.44        2.0905    4   0   0         4
                46.05          2.33        1.9710    3   3   0         4
                47.03         20.36        1.9322    4   0   1         8
                48.35         15.83        1.8826    4   1   1        16
                48.70          5.62        1.8698    4   2   0         8
                49.88         15.66        1.8283    3   1   2        16
                52.15         12.51        1.7540    4   2   1        16
                53.60         14.03        1.7098    3   2   2        16
                54.90          1.37        1.6724    4   3   0         8
                56.08          2.59        1.6400    5   1   0         8
                59.04          4.47        1.5645    2   0   3         8
                59.23          7.05        1.5601    5   1   1        16
                59.44          6.55        1.5550    3   3   2         8
                59.53          1.80        1.5528    5   2   0         8
                60.17         12.24        1.5378    2   1   3        16
                61.68          3.94        1.5039    4   2   2        16
                62.87          1.16        1.4782    4   4   0         4
                65.64          1.15        1.4223    3   1   3        16
                67.08          2.17        1.3953    4   3   2        16
                67.94          6.84        1.3798    5   3   1        16
                68.13          1.56        1.3762    5   1   2        16
                68.22         10.82        1.3747    6   1   0         8
                68.81          1.58        1.3643    3   2   3        16
                71.25          6.73        1.3235    5   2   2        16
                71.92          5.04        1.3129    4   0   3         8
                72.36          1.31        1.3060    5   4   0         8
                72.94          3.79        1.2970    4   1   3        16
                74.31          3.71        1.2764    4   4   2         8
                75.07          3.36        1.2653    0   0   4         2
                75.13          3.22        1.2645    5   4   1        16
                75.97          3.49        1.2526    4   2   3        16
                79.07          1.79        1.2111    2   0   4         8
                79.12          5.50        1.2104    6   3   1        16
                79.31          8.46        1.2080    6   1   2        16
                80.06          2.00        1.1986    2   1   4        16
                81.93          2.28        1.1759    5   1   3        16
                83.25          2.49        1.1605    5   4   2        16
                84.05          1.97        1.1516    7   1   1        16
                84.98          1.02        1.1414    3   1   4        16
                87.90          1.57        1.1108    3   2   4        16
                89.75          2.93        1.0927    5   3   3        16
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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.