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 = 12.4 GPa
      _database_code_amcsd 0013229

      CELL PARAMETERS:    5.1480   5.1480   5.1480   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    136.432
      Density (g/cm3):      1.903
      MAX. ABS. INTENSITY / VOLUME**2:      36.70392284    
      RIR:      6.279
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                30.07        100.00        2.9722    1   1   1         8
                34.86         47.40        2.5740    2   0   0         6
                50.12         26.21        1.8201    2   2   0        12
                59.56         26.53        1.5522    3   1   1        24
                62.50          7.29        1.4861    2   2   2         8
                73.60          2.86        1.2870    4   0   0         6
                81.50          7.92        1.1810    3   3   1        24
                84.09          7.14        1.1511    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.