Selenium
      Keller R, Holzapfel W B, Schulz H
      Physical Review B16 (1977) 4404-4412
      Effect of pressure on the atom positions in Se and Te
      Locality: synthetic
      Sample: at P = 2.58 GPa
      Note: known as alpha phase with trigonal structure
      _database_code_amcsd 0015162

      CELL PARAMETERS:    4.0520   4.0520   5.0380   90.000   90.000  120.000
      SPACE GROUP: P3_121    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     71.635
      Density (g/cm3):      5.490
      MAX. ABS. INTENSITY / VOLUME**2:      171.0600077    
      RIR:     10.145
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                25.38         30.15        3.5091    1   0   0         6
                31.06          8.49        2.8795    0   1   1         6
                31.06         91.51        2.8795    1   0   1         6
                44.26         32.59        2.0463    0   1   2         6
                44.26          3.02        2.0463    1   0   2         6
                44.73         18.25        2.0260    1   1   0         3
                48.43         17.41        1.8797    1   1   1         6
                52.13          2.65        1.7546    2   0   0         6
                54.65          7.18        1.6793    0   0   3         2
                55.45          6.69        1.6570    0   2   1         6
                55.45         11.69        1.6570    2   0   1         6
                58.46          9.52        1.5787    1   1   2         6
                61.18          2.23        1.5148    0   1   3         6
                61.18          2.23        1.5148    1   0   3         6
                64.75          7.05        1.4397    0   2   2         6
                64.75          4.04        1.4397    2   0   2         6
                71.08         11.90        1.3263    2   1   0         6
                73.21          7.53        1.2929    1   1   3         6
                73.89          3.60        1.2826    1   2   1         6
                73.89          2.11        1.2826    2   1   1         6
                81.13          4.80        1.1855    1   0   4         6
                82.13          1.55        1.1736    1   2   2         6
                82.13          2.64        1.1736    2   1   2         6
                85.16          5.13        1.1394    0   3   1         6
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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.