Sphalerite
Diffraction data computed using the structure from the paper listed below, 
along with the cell parameters refined from the powder pattern of R050005
      Skinner B J
      American Mineralogist 46 (1961) 1399-1411
      Unit-cell edges of natural and synthetic sphalerites

      CELL PARAMETERS:   5.4142  5.4142  5.4142   90.000   90.000   90.000
      SPACE GROUP: F-43m     

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Zn     0.00000   0.00000   0.00000     1.000     0.700
            S      0.25000   0.25000   0.25000     1.000     1.000

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  4 +/-  4 +/-  4
            MAX. ABS. INTENSITY / VOLUME**2:      119.5022488    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                28.56        100.00        3.1259    1   1   1
                33.09         11.98        2.7071    2   0   0
                47.50         56.78        1.9142    2   2   0
                56.36         36.93        1.6324    3   1   1
                59.11          2.94        1.5629    2   2   2
                69.44          7.63        1.3535    4   0   0
                76.73         12.62        1.2421    3   3   1
                79.10          3.11        1.2107    4   2   0
                88.46         14.30        1.1052    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.