GdAs
      Wyckoff R W G
      Crystal Structures 1 (1963) 85-237
      Second edition. Interscience Publishers, New York, New York
      rocksalt structure
      _database_code_amcsd 0011315

      CELL PARAMETERS:    5.8540   5.8540   5.8540   90.000   90.000   90.000
      SPACE GROUP: Fm3m      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    200.613
      Density (g/cm3):      7.686
      MAX. ABS. INTENSITY / VOLUME**2:      388.9252753    
      RIR:     16.477
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                26.37         20.09        3.3798    1   1   1         8
                30.54        100.00        2.9270    2   0   0         6
                43.74         69.95        2.0697    2   2   0        12
                51.80          7.54        1.7650    3   1   1        24
                54.28         22.95        1.6899    2   2   2         8
                63.57          9.93        1.4635    4   0   0         6
                70.06          2.27        1.3430    3   3   1        24
                72.16         25.49        1.3090    4   2   0        24
                80.35         17.86        1.1949    4   2   2        24
                86.36          1.01        1.1266    5   1   1        24
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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.