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 = 3040 K
      _database_code_amcsd 0008066

      CELL PARAMETERS:    4.4403   4.4403   4.4403   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     87.546
      Density (g/cm3):      3.057
      MAX. ABS. INTENSITY / VOLUME**2:      29.54821208    
      RIR:      3.147
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                35.00         10.12        2.5636    1   1   1         8
                40.64        100.00        2.2201    2   0   0         6
                58.82         52.61        1.5699    2   2   0        12
                70.32          6.30        1.3388    3   1   1        24
                73.95         14.32        1.2818    2   2   2         8
                87.97          5.81        1.1101    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.