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 = 1 atm, mounted on a cryo-tip with Be shroud
      _database_code_amcsd 0000510

      CELL PARAMETERS:    4.2080   4.2080   4.2080   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:     74.512
      Density (g/cm3):      3.592
      MAX. ABS. INTENSITY / VOLUME**2:      36.21281603    
      RIR:      3.282
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                37.00         10.47        2.4295    1   1   1         8
                42.99        100.00        2.1040    2   0   0         6
                62.42         53.99        1.4878    2   2   0        12
                74.83          6.64        1.2688    3   1   1        24
                78.79         15.63        1.2147    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.