Corkite
Diffraction data computed using the structure from the paper listed below, 
along with the cell parameters refined from single crystal data of R070491
      Giuseppe G, Tadini C
      Neues Jahrbuch fur Mineralogie, Monatshefte 1987 (1987) 71-81
      Corkite, PbFe3(SO4)(PO4)(OH)6, its crystal structure and ordered
      arrangement of the tetrahedral cations
      Note: this is the prefered structure of these authors
      Locality: Dernbach, Hessen-Nassau, Germany

      CELL PARAMETERS:   7.2920  7.2920 16.9370   90.000   90.000  120.000
      SPACE GROUP: R3m       

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Pb     0.00000   0.00000   0.00000     1.000     4.050
            Fe     0.50130   0.00260   0.50020     1.000     0.870
            S      0.00000   0.00000  -0.30980     1.000     0.580
            P      0.00000   0.00000   0.31440     1.000     1.110
            O      0.00000   0.00000  -0.39670     1.000     1.120
            O      0.00000   0.00000   0.40510     1.000     0.890
            O     -0.21910   0.21910   0.05040     1.000     0.810
            O      0.22160  -0.22160  -0.05600     1.000     1.010
            Oh    -0.12640   0.12640  -0.12580     1.000     1.050
            Oh     0.12640  -0.12640   0.13730     1.000     0.800
            H     -0.19400   0.19400  -0.10800     1.000     3.000
            H      0.19200  -0.19200   0.11900     1.000     3.000

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    0.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  5 +/-  5 +/- 15
            MAX. ABS. INTENSITY / VOLUME**2:      74.90046475    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                14.97        100.00        5.9171    1   0   1
                15.70          1.79        5.6457    0   0   3
                17.52          4.93        5.0624    0   1   2
                24.41         29.67        3.6460    1   1   0
                25.32          6.93        3.5169    1   0   4
                28.76          2.10        3.1040    0   2   1
                29.16         89.98        3.0628    1   1   3
                29.93          6.21        2.9851    0   1   5
                30.21         24.34        2.9586    2   0   2
                31.70         14.12        2.8228    0   0   6
                35.46         22.70        2.5312    0   2   4
                38.07         13.35        2.3635    2   1   1
                39.00          1.86        2.3097    2   0   5
                39.21         11.93        2.2974    1   2   2
                39.90         22.95        2.2594    1   0   7
                40.41          5.74        2.2320    1   1   6
                42.97          1.79        2.1050    3   0   0
                43.53          4.27        2.0793    2   1   4
                45.17          1.03        2.0073    0   1   8
                46.02         18.45        1.9724    0   3   3
                46.02          4.24        1.9724    3   0   3
                46.55          6.99        1.9511    1   2   5
                50.03         18.28        1.8230    2   2   0
                52.01          5.99        1.7584    2   0   8
                52.53          3.29        1.7422    1   3   1
                53.96          5.62        1.6992    2   1   7
                54.37          1.17        1.6875    0   3   6
                54.37          1.00        1.6875    3   0   6
                54.90          5.54        1.6723    1   1   9
                56.23          1.28        1.6359    1   0  10
                59.41          5.19        1.5558    3   1   5
                59.57          4.85        1.5520    0   4   2
                60.45         10.62        1.5314    2   2   6
                62.20          9.24        1.4925    0   2  10
                62.82          4.06        1.4793    4   0   4
                64.56          2.72        1.4435    3   2   1
                65.83          3.22        1.4188    1   3   7
                66.66          2.56        1.4030    0   3   9
                68.03          1.72        1.3781    4   1   0
                70.32          4.01        1.3388    4   1   3
                70.32          3.02        1.3388    1   4   3
                74.34          1.08        1.2760    1   0  13
                76.66          3.75        1.2430    3   2   7
                78.57          1.29        1.2175    1   3  10
                83.76          1.64        1.1549    4   0  10
                84.77          1.98        1.1436    2   1  13
                87.38          1.82        1.1160    2   2  12
                87.80          1.02        1.1118    4   1   9
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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.