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 = 4.99 GPa
      Note: known as alpha phase with trigonal structure
      _database_code_amcsd 0015164

      CELL PARAMETERS:    3.9100   3.9100   5.0800   90.000   90.000  120.000
      SPACE GROUP: P3_121    
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     67.259
      Density (g/cm3):      5.847
      MAX. ABS. INTENSITY / VOLUME**2:      190.0243972    
      RIR:     10.581
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                26.32         21.36        3.3862    1   0   0         6
                31.76          6.84        2.8176    0   1   1         6
                31.76         93.16        2.8176    1   0   1         6
                44.59         34.50        2.0319    0   1   2         6
                44.59          2.53        2.0319    1   0   2         6
                46.45         20.16        1.9550    1   1   0         3
                49.99         13.25        1.8246    1   1   1         6
                54.16          7.55        1.6933    0   0   3         2
                54.17          2.51        1.6931    2   0   0         6
                57.37          8.17        1.6062    0   2   1         6
                57.37          8.54        1.6062    2   0   1         6
                59.68          7.48        1.5492    1   1   2         6
                61.20          1.73        1.5145    0   1   3         6
                61.20          1.73        1.5145    1   0   3         6
                66.35          5.31        1.4088    0   2   2         6
                66.35          5.08        1.4088    2   0   2         6
                74.07          9.01        1.2800    1   1   3         6
                74.08          9.28        1.2798    2   1   0         6
                76.80          3.29        1.2411    1   2   1         6
                76.80          3.15        1.2411    2   1   1         6
                80.83          5.25        1.1891    1   0   4         6
                84.83          2.49        1.1430    2   1   2         6
                84.83          2.38        1.1430    1   2   2         6
                88.80          4.20        1.1018    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.