Periclase
      Dubrovinsky L S, Saxena S K
      Physics and Chemistry of Minerals 24 (1997) 547-550
      Thermal expansion of periclase (MgO) and tungsten (W)
      to melting temperatures
      Sample: T = 2592 K
      _database_code_amcsd 0008057

      CELL PARAMETERS:    4.3741   4.3741   4.3741   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     83.689
      Density (g/cm3):      3.198
      MAX. ABS. INTENSITY / VOLUME**2:      30.68716336    
      RIR:      3.124
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                35.55         10.35        2.5254    1   1   1         8
                41.28        100.00        2.1871    2   0   0         6
                59.80         51.99        1.5465    2   2   0        12
                71.54          6.31        1.3188    3   1   1        24
                75.26         14.11        1.2627    2   2   2         8
                89.66          5.78        1.0935    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.