Wulfenite
Diffraction data computed using the structure from the paper listed below, 
along with the cell parameters refined from the powder pattern of R050024
      Lugli C, Medici L, Saccardo D
      Neues Jahrbuch fur Mineralogie, Monatshefte 1999 (1999) 281-288
      Natural wulfenite: structural refinement by single-crystal X-ray diffraction
      Locality: Monte Cengio, Vicenza, Italy

      CELL PARAMETERS:   5.4374  5.4374 12.1123   90.000   90.000   90.000
      ALTERNATE SETTING FOR SPACE GROUP: I4_1/a    

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Pb     0.50000   0.25000   0.37500     1.000     0.800
            Mo     0.00000   0.25000   0.62500     1.000     0.460
            O      0.76540   0.11400   0.54410     1.000     1.310

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  4 +/-  4 +/- 11
            MAX. ABS. INTENSITY / VOLUME**2:      379.8113596    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                17.88         11.43        4.9605    1   0   1
                27.48        100.00        3.2459    1   1   2
                27.52          3.66        3.2415    1   0   3
                29.50         16.52        3.0281    0   0   4
                32.95         23.41        2.7187    2   0   0
                37.73          1.23        2.3841    2   1   1
                37.73          5.46        2.3841    1   2   1
                40.78          3.31        2.2128    1   0   5
                43.44          3.80        2.0830    2   1   3
                43.44          1.33        2.0830    1   2   3
                44.80         27.70        2.0230    2   0   4
                47.28         11.24        1.9224    2   2   0
                50.95          1.49        1.7925    3   0   1
                51.10         16.40        1.7873    1   1   6
                55.56         14.03        1.6541    3   1   2
                55.56         11.14        1.6541    1   3   2
                55.58          1.07        1.6535    3   0   3
                55.75          1.20        1.6489    1   0   7
                56.72         11.78        1.6230    2   2   4
                61.22          1.92        1.5140    0   0   8
                69.10          3.15        1.3593    4   0   0
                71.30          6.31        1.3228    2   0   8
                72.16          6.80        1.3090    1   3   6
                72.16          4.77        1.3090    3   1   6
                75.88          4.91        1.2538    3   3   2
                76.87          4.57        1.2401    4   0   4
                78.70          2.28        1.2158    2   4   0
                78.70          2.47        1.2158    4   2   0
                80.80          3.88        1.1894    2   2   8
                83.72          3.63        1.1553    1   1  10
                86.20          3.26        1.1283    2   4   4
                86.20          3.15        1.1283    4   2   4
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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.