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 = 142.5 GPa
      Note: structure known as bcc, phase Se VI
      _database_code_amcsd 0012751

      CELL PARAMETERS:    2.8159   2.8159   2.8159   90.000   90.000   90.000
      SPACE GROUP: Im3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     22.328
      Density (g/cm3):     11.743
      MAX. ABS. INTENSITY / VOLUME**2:      599.6328782    
      RIR:     16.627
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                45.56        100.00        1.9911    1   1   0        12
                66.40         14.90        1.4080    2   0   0         6
                84.23         29.07        1.1496    2   1   1        24
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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.