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 = 1685 K
      _database_code_amcsd 0008048

      CELL PARAMETERS:    4.2993   4.2993   4.2993   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     79.468
      Density (g/cm3):      3.368
      MAX. ABS. INTENSITY / VOLUME**2:      32.03141220    
      RIR:      3.096
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                36.19         10.64        2.4822    1   1   1         8
                42.03        100.00        2.1497    2   0   0         6
                60.95         51.28        1.5200    2   2   0        12
                72.98          6.32        1.2963    3   1   1        24
                76.80         13.88        1.2411    2   2   2         8
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.