Periclase
      Fiquet G, Richet P, Montagnac G
      Physics and Chemistry of Minerals 27 (1999) 103-111
      High-temperature thermal expansion of lime, periclase,
      corundum and spinel
      Sample: Re wire, T = 2673 K
      _database_code_amcsd 0008361

      CELL PARAMETERS:    4.3810   4.3810   4.3810   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     84.085
      Density (g/cm3):      3.183
      MAX. ABS. INTENSITY / VOLUME**2:      30.56626098    
      RIR:      3.127
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                35.49         10.33        2.5294    1   1   1         8
                41.21        100.00        2.1905    2   0   0         6
                59.70         52.05        1.5489    2   2   0        12
                71.41          6.31        1.3209    3   1   1        24
                75.12         14.13        1.2647    2   2   2         8
                89.48          5.78        1.0953    4   0   0         6
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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.