Sphalerite
Diffraction data computed using the structure from the paper listed below, 
along with the cell parameters refined from the powder pattern of R040136
      Skinner B J
      American Mineralogist 46 (1961) 1399-1411
      Unit-cell edges of natural and synthetic sphalerites

      CELL PARAMETERS:   5.4115  5.4115  5.4115   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:      119.6943640    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                28.57        100.00        3.1243    1   1   1
                33.11         11.98        2.7057    2   0   0
                47.52         56.75        1.9133    2   2   0
                56.39         36.91        1.6316    3   1   1
                59.14          2.94        1.5622    2   2   2
                69.48          7.63        1.3529    4   0   0
                76.77         12.62        1.2415    3   3   1
                79.15          3.11        1.2100    4   2   0
                88.52         14.30        1.1046    4   2   2
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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.