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 = 13.8 GPa
      _database_code_amcsd 0013230

      CELL PARAMETERS:    5.1040   5.1040   5.1040   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    132.963
      Density (g/cm3):      1.953
      MAX. ABS. INTENSITY / VOLUME**2:      37.63925618    
      RIR:      6.276
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                30.33        100.00        2.9468    1   1   1         8
                35.17         47.29        2.5520    2   0   0         6
                50.58         25.98        1.8045    2   2   0        12
                60.13         26.22        1.5389    3   1   1        24
                63.10          7.20        1.4734    2   2   2         8
                74.34          2.83        1.2760    4   0   0         6
                82.35          7.85        1.1709    3   3   1        24
                84.98          7.09        1.1413    4   2   0        24
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.