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 = 7.70 GPa
      Note: known as alpha phase with trigonal structure
      _database_code_amcsd 0015166

      CELL PARAMETERS:    3.8100   3.8100   5.1100   90.000   90.000  120.000
      SPACE GROUP: P3_121    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     64.239
      Density (g/cm3):      6.122
      MAX. ABS. INTENSITY / VOLUME**2:      198.5318366    
      RIR:     10.559
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                27.02         21.11        3.2996    1   0   0         6
                32.30          6.89        2.7719    0   1   1         6
                32.30         93.11        2.7719    1   0   1         6
                44.87         35.45        2.0201    0   1   2         6
                44.87          2.62        2.0201    1   0   2         6
                47.74         19.30        1.9050    1   1   0         3
                51.17         13.00        1.7850    1   1   1         6
                53.82          8.08        1.7033    0   0   3         2
                55.72          2.41        1.6498    2   0   0         6
                58.82          7.83        1.5700    0   2   1         6
                58.82          8.33        1.5700    2   0   1         6
                60.63          7.51        1.5272    1   1   2         6
                61.24          1.83        1.5136    0   1   3         6
                61.24          1.83        1.5136    1   0   3         6
                67.59          5.29        1.3860    0   2   2         6
                67.59          4.98        1.3860    2   0   2         6
                74.76          9.13        1.2698    1   1   3         6
                76.36          8.93        1.2471    2   1   0         6
                79.03          3.17        1.2116    1   2   1         6
                79.03          2.98        1.2116    2   1   1         6
                80.65          5.53        1.1913    1   0   4         6
                86.92          2.46        1.1207    2   1   2         6
                86.92          2.31        1.1207    1   2   2         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.