Chlorargyrite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R070338
      Wyckoff R W G
      Crystal Structures 1 (1963) 85-237
      Second edition. Interscience Publishers, New York, New York
      rocksalt structure

      CELL PARAMETERS:   5.632165   5.632165   5.632165   90.00000   90.00000   90.00000
      SPACE GROUP: Fm3m
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                27.47         52.01        3.2517    1   1   1
                31.82        100.00        2.8161    2   0   0
                45.58         63.96        1.9913    2   2   0
                54.02         20.92        1.6982    3   1   1
                56.63         19.88        1.6259    2   2   2
                66.40          8.41        1.4080    4   0   0
                73.26          7.09        1.2921    3   3   1
                75.48         21.70        1.2594    4   2   0
                84.20         15.70        1.1497    4   2   2
                84.20         15.70        1.1497    4   2   2
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.