K2 O
      Zintl E, Harder A, Dauth B
      Zeitschrift fur Elektrochemie 40 (1934) 588-593
      Gitterstruktur der Oxide, Sulfide, Selenide und Telluride des Lithiums,
      Natriums und Kaliums
      _cod_database_code 1010878
      _database_code_amcsd 0017549

      CELL PARAMETERS:    6.4360   6.4360   6.4360   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    266.593
      Density (g/cm3):      2.347
      MAX. ABS. INTENSITY / VOLUME**2:      34.64344472    
      RIR:      4.807
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                23.95          9.88        3.7158    1   1   1         8
                27.72         65.23        3.2180    2   0   0         6
                39.61        100.00        2.2755    2   2   0        12
                46.82          3.05        1.9405    3   1   1        24
                49.03         13.52        1.8579    2   2   2         8
                57.26         12.27        1.6090    4   0   0         6
                64.78         13.86        1.4391    4   2   0        24
                71.86         19.48        1.3137    4   2   2        24
                85.31          5.22        1.1377    4   4   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.