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 = 23 C, P = 17 kbar
      _database_code_amcsd 0000514

      CELL PARAMETERS:    4.1980   4.1980   4.1980   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     73.982
      Density (g/cm3):      3.618
      MAX. ABS. INTENSITY / VOLUME**2:      35.93528619    
      RIR:      3.234
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                37.09         10.91        2.4237    1   1   1         8
                43.10        100.00        2.0990    2   0   0         6
                62.59         53.25        1.4842    2   2   0        12
                75.04          7.00        1.2657    3   1   1        24
                79.01         15.24        1.2119    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.