Potassium
      Liu L
      Journal of Physics and Chemistry of Solids 47 (1986) 1067-1072
      Compression and polymorphism of potassium to 400 Kbar
      Locality: synthetic
      Sample: bcc at P = 2.1 GPa
      _database_code_amcsd 0013217

      CELL PARAMETERS:    4.7250   4.7250   4.7250   90.000   90.000   90.000
      SPACE GROUP: Im3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    105.489
      Density (g/cm3):      1.231
      MAX. ABS. INTENSITY / VOLUME**2:      32.58246250    
      RIR:      8.620
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                26.68        100.00        3.3411    1   1   0        12
                38.09         16.66        2.3625    2   0   0         6
                47.11         31.23        1.9290    2   1   1        24
                54.97          8.61        1.6705    2   2   0        12
                62.12         10.55        1.4942    3   1   0        24
                68.83          2.33        1.3640    2   2   2         8
                75.25          9.92        1.2628    3   2   1        48
                87.61          2.96        1.1137    4   1   1        24
                87.61          1.48        1.1137    3   3   0        12
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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.