Selenium
      Cherin P, Unger P
      Inorganic Chemistry 6 (1967) 1589-1591
      The crystal structure of trigonal selenium
      Locality: synthetic
      _database_code_amcsd 0012674

      CELL PARAMETERS:    4.3662   4.3662   4.9536   90.000   90.000  120.000
      SPACE GROUP: P3_121    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     81.782
      Density (g/cm3):      4.809
      MAX. ABS. INTENSITY / VOLUME**2:      126.0260398    
      RIR:      8.533
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                23.53         45.22        3.7812    1   0   0         6
                29.72         10.27        3.0056    0   1   1         6
                29.72         89.73        3.0056    1   0   1         6
                41.36         15.46        2.1831    1   1   0         3
                43.69         26.05        2.0719    0   1   2         6
                43.69          2.98        2.0719    1   0   2         6
                45.40         20.13        1.9977    1   1   1         6
                48.13          2.31        1.8906    2   0   0         6
                51.76         13.20        1.7663    2   0   1         6
                51.76          4.36        1.7663    0   2   1         6
                55.66          4.86        1.6512    0   0   3         2
                56.16          9.06        1.6377    1   1   2         6
                61.26          1.89        1.5132    0   1   3         6
                61.26          1.89        1.5132    1   0   3         6
                61.73          6.59        1.5028    0   2   2         6
                61.73          2.18        1.5028    2   0   2         6
                65.29         10.77        1.4292    2   1   0         6
                68.31          2.63        1.3732    1   2   1         6
                68.31          1.13        1.3732    2   1   1         6
                71.66          3.71        1.3169    1   1   3         6
                77.04          1.60        1.2379    2   1   2         6
                78.27          3.60        1.2215    0   3   1         6
                81.85          2.19        1.1769    1   0   4         6
                86.67          2.41        1.1233    3   0   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.