Periclase
      Hazen R M
      American Mineralogist 61 (1976) 266-271
      Effects of temperature and pressure on the cell dimension and X-ray temperature
      factors of periclase
      T = 753 C, P = 1 atm
      _database_code_amcsd 0000507

      CELL PARAMETERS:    4.2490   4.2490   4.2490   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     76.711
      Density (g/cm3):      3.489
      MAX. ABS. INTENSITY / VOLUME**2:      32.97071636    
      RIR:      3.077
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                36.63         10.85        2.4532    1   1   1         8
                42.55        100.00        2.1245    2   0   0         6
                61.75         50.80        1.5022    2   2   0        12
                73.99          6.33        1.2811    3   1   1        24
                77.88         13.74        1.2266    2   2   2         8
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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.