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 = 4.15 GPa
      Note: known as alpha phase with trigonal structure
      _database_code_amcsd 0015163

      CELL PARAMETERS:    3.9560   3.9560   5.0690   90.000   90.000  120.000
      SPACE GROUP: P3_121    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     68.701
      Density (g/cm3):      5.725
      MAX. ABS. INTENSITY / VOLUME**2:      185.4667422    
      RIR:     10.549
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                26.01         22.12        3.4260    1   0   0         6
                31.52          6.96        2.8385    0   1   1         6
                31.52         93.04        2.8385    1   0   1         6
                44.46         34.04        2.0375    0   1   2         6
                44.46          2.55        2.0375    1   0   2         6
                45.88         20.29        1.9780    1   1   0         3
                49.46         13.68        1.8427    1   1   1         6
                53.49          2.57        1.7130    2   0   0         6
                54.29          7.35        1.6897    0   0   3         2
                56.72          8.16        1.6228    0   2   1         6
                56.72          8.86        1.6228    2   0   1         6
                59.26          7.64        1.5593    1   1   2         6
                61.16          1.74        1.5154    0   1   3         6
                61.16          1.74        1.5154    1   0   3         6
                65.80          5.46        1.4192    0   2   2         6
                65.80          5.02        1.4192    2   0   2         6
                73.07          9.63        1.2949    2   1   0         6
                73.75          8.84        1.2847    1   1   3         6
                75.83          3.36        1.2546    1   2   1         6
                75.83          3.09        1.2546    2   1   1         6
                80.88          5.12        1.1885    1   0   4         6
                83.91          2.32        1.1531    1   2   2         6
                83.91          2.52        1.1531    2   1   2         6
                87.57          4.31        1.1141    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.