GaAs
      Wyckoff R W G
      Crystal Structures 1 (1963) 85-237
      Second edition. Interscience Publishers, New York, New York
      Note: ZnS structure, sphalerite structure
      _database_code_amcsd 0011523

      CELL PARAMETERS:    5.6537   5.6537   5.6537   90.000   90.000   90.000
      SPACE GROUP: F-43m     
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    180.717
      Density (g/cm3):      5.316
      MAX. ABS. INTENSITY / VOLUME**2:      189.0825670    
      RIR:     11.582
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                27.32        100.00        3.2642    1   1   1         4
                45.37         71.00        1.9989    2   2   0        12
                53.78         41.43        1.7047    3   1   1        12
                66.11         10.40        1.4134    4   0   0         6
                72.93         15.04        1.2970    3   3   1        12
                83.83         19.65        1.1541    4   2   2        12
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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.