Selenium
      Akahama Y, Kobayashi M, Kawamura H
      Japanese Journal of Applied Physics 31 (1992) 1621-1624
      Structural study on pressure-induced phase transition from beta-Po type to bcc in selenium at 140 GP
      Locality: synthetic
      Sample: at P = 76.9 GPa
      Note: structure known as beta-Po type, phase Se V
      _database_code_amcsd 0012741

      CELL PARAMETERS:    3.9370   3.9370   3.0440   90.000   90.000  120.000
      SPACE GROUP: R-3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     40.861
      Density (g/cm3):      9.625
      MAX. ABS. INTENSITY / VOLUME**2:      305.9133599    
      RIR:     10.349
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                39.69        100.00        2.2707    1   0   1         6
                46.11         63.43        1.9685    1   1   0         6
                62.44         23.99        1.4874    0   2   1         6
                67.38         18.71        1.3898    0   1   2         6
                81.03         21.25        1.1867    2   1   1        12
                85.42          9.23        1.1365    3   0   0         6
                85.53          9.20        1.1354    2   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.