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: fcc at P = 16.5 GPa
      _database_code_amcsd 0013233

      CELL PARAMETERS:    4.9630   4.9630   4.9630   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    122.245
      Density (g/cm3):      2.124
      MAX. ABS. INTENSITY / VOLUME**2:      40.82496129    
      RIR:      6.258
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                31.21        100.00        2.8654    1   1   1         8
                36.20         46.93        2.4815    2   0   0         6
                52.12         25.22        1.7547    2   2   0        12
                62.02         25.25        1.4964    3   1   1        24
                65.11          6.92        1.4327    2   2   2         8
                76.83          2.73        1.2407    4   0   0         6
                85.23          7.66        1.1386    3   3   1        24
                88.00          6.95        1.1098    4   2   0        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.