Potassium
      Barrett C S
      Acta Crystallographica 9 (1956) 671-677
      X-ray study of the alkali metals at low temperatures
      Locality: synthetic
      Sample: at T = 66 K
      _database_code_amcsd 0009188

      CELL PARAMETERS:    5.2360   5.2360   5.2360   90.000   90.000   90.000
      SPACE GROUP: Im3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    143.549
      Density (g/cm3):      0.904
      MAX. ABS. INTENSITY / VOLUME**2:      23.48970674    
      RIR:      8.457
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                24.04        100.00        3.7024    1   1   0        12
                34.25         17.69        2.6180    2   0   0         6
                42.28         34.75        2.1376    2   1   1        24
                49.22          9.91        1.8512    2   2   0        12
                55.50         12.42        1.6558    3   1   0        24
                61.33          2.77        1.5115    2   2   2         8
                66.86         11.77        1.3994    3   2   1        48
                72.16          1.09        1.3090    4   0   0         6
                77.31          3.36        1.2341    4   1   1        24
                77.31          1.68        1.2341    3   3   0        12
                82.36          2.70        1.1708    4   2   0        24
                87.35          2.24        1.1163    3   3   2        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.