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
      Note: known as alpha phase with trigonal structure
      _database_code_amcsd 0015161

      CELL PARAMETERS:    4.3680   4.3680   4.9580   90.000   90.000  120.000
      SPACE GROUP: P3_121    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     81.922
      Density (g/cm3):      4.801
      MAX. ABS. INTENSITY / VOLUME**2:      140.7146196    
      RIR:      9.544
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                23.52         43.37        3.7828    1   0   0         6
                29.71         10.27        3.0074    0   1   1         6
                29.71         89.73        3.0074    1   0   1         6
                41.34         17.09        2.1840    1   1   0         3
                43.65         29.51        2.0734    0   1   2         6
                43.65          3.38        2.0734    1   0   2         6
                45.38         23.19        1.9987    1   1   1         6
                48.11          2.74        1.8914    2   0   0         6
                51.73          5.39        1.7672    0   2   1         6
                51.73         16.32        1.7672    2   0   1         6
                55.61          6.31        1.6527    0   0   3         2
                56.12         11.82        1.6387    1   1   2         6
                61.20          2.63        1.5144    0   1   3         6
                61.20          2.63        1.5144    1   0   3         6
                61.68          9.22        1.5037    0   2   2         6
                61.68          3.05        1.5037    2   0   2         6
                65.26         15.81        1.4298    2   1   0         6
                68.27          4.02        1.3738    1   2   1         6
                68.27          1.73        1.3738    2   1   1         6
                71.60          5.94        1.3179    1   1   3         6
                76.99          1.19        1.2385    1   2   2         6
                76.99          2.76        1.2385    2   1   2         6
                78.23          6.34        1.2220    0   3   1         6
                81.76          4.07        1.1779    1   0   4         6
                86.62          4.81        1.1239    3   0   2         6
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.