Chlorargyrite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R050360
      Wyckoff R W G
      Crystal Structures 1 (1963) 85-237
      Second edition. Interscience Publishers, New York, New York
      rocksalt structure

      CELL PARAMETERS:   5.470000   5.470000   5.470000   90.00000   90.00000   90.00000
      SPACE GROUP: Fm3m
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                27.52         52.01        3.2453    1   1   1
                31.88        100.00        2.8105    2   0   0
                45.67         63.96        1.9873    2   2   0
                54.13         20.92        1.6948    3   1   1
                56.74         19.88        1.6226    2   2   2
                66.54          8.41        1.4052    4   0   0
                73.42          7.09        1.2895    3   3   1
                75.65         21.70        1.2569    4   2   0
                84.40         15.70        1.1474    4   2   2
                84.40         15.70        1.1474    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.