Asisite
Diffraction data computed using the structure from the paper listed below, 
along with the cell parameters refined from single crystal data of R070635
      Rouse R C, Peacor D R, Dunn P J, Criddle A J, Stanley C J, Innes J
      American Mineralogist 73 (1988) 643-650
      Asisite, a silicon-bearing lead oxychloride from the Kombat mine, South West
      Africa (Namibia)

      CELL PARAMETERS:   3.9498  3.9498 22.6760   90.000   90.000   90.000
      SPACE GROUP: I4/mmm    

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Pb     0.00000   0.00000   0.08380     1.000     1.237
            Pb     0.00000   0.00000   0.30470     0.750     1.316
            Cl     0.00000   0.00000   0.50000     1.000     3.948
            O      0.00000   0.50000   0.14400     1.000     5.843

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    0.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  3 +/-  3 +/- 20
            MAX. ABS. INTENSITY / VOLUME**2:      386.6207628    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                15.63          7.72        5.6690    0   0   4
                22.85         18.87        3.8912    1   0   1
                23.54          3.23        3.7793    0   0   6
                25.44         15.82        3.5007    1   0   3
                30.00        100.00        2.9785    1   0   5
                31.56          7.65        2.8345    0   0   8
                32.05         41.26        2.7929    1   1   0
                35.85          3.96        2.5048    1   0   7
                39.75          5.67        2.2676    0   0  10
                40.15          6.58        2.2461    1   1   6
                45.60         14.11        1.9894    1   1   8
                45.95         18.79        1.9749    2   0   0
                48.83          1.27        1.8650    2   0   4
                49.90          1.08        1.8275    1   0  11
                51.92          4.17        1.7611    2   1   1
                51.94         13.25        1.7604    1   1  10
                52.26          1.85        1.7503    2   0   6
                53.26          4.08        1.7201    2   1   3
                55.86         30.10        1.6460    2   1   5
                56.82          5.72        1.6204    2   0   8
                57.78         10.97        1.5956    1   0  13
                59.02          1.93        1.5651    1   1  12
                59.62          1.48        1.5508    2   1   7
                62.35          5.57        1.4893    2   0  10
                66.19          1.79        1.4119    1   0  15
                67.02          5.02        1.3965    2   2   0
                68.75          1.06        1.3653    2   0  12
                75.14          5.41        1.2644    3   0   5
                75.46          1.46        1.2598    0   0  18
                75.96          2.24        1.2527    2   2   8
                76.23          5.68        1.2490    3   1   0
                76.80          8.47        1.2412    2   1  13
                80.83          2.39        1.1891    2   2  10
                81.09          1.26        1.1859    3   1   6
                84.32          1.58        1.1485    2   1  15
                84.34          3.79        1.1484    1   1  18
                84.83          3.56        1.1430    3   1   8
                89.60          4.05        1.0940    3   1  10
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.