Stolzite
Diffraction data computed using the structure from the paper listed below, 
along with the cell parameters refined from single crystal data of R130615
      Xu K, Xue J, Ding Y, Lu G
      Acta Geologica Sinica 8 (1995) 111-116
      Discovery of stolzite in China and refinement of its crystal structure
      Locality: Yaogangxian, Hunan Province, China
      _database_code_amcsd 0011974

      CELL PARAMETERS:   5.4566  5.4566 12.0722   90.000   90.000   90.000
      SPACE GROUP: I4_1/a    

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Pb     0.00000   0.00000   0.50000     1.000     0.161
            W      0.00000   0.00000   0.00000     1.000     0.680
            O      0.26370   0.11370   0.07060     1.000     8.298

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  5 +/-  5 +/- 11
            MAX. ABS. INTENSITY / VOLUME**2:      608.4157830    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                27.44        100.00        3.2510    1   1   2
                29.60         19.68        3.0180    0   0   4
                32.83         28.42        2.7283    2   0   0
                44.78         27.55        2.0239    2   0   4
                47.11         11.40        1.9292    2   2   0
                51.20         18.39        1.7840    1   1   6
                55.38         15.44        1.6591    3   1   2
                55.38         13.61        1.6591    1   3   2
                56.62         13.46        1.6255    2   2   4
                61.44          2.35        1.5090    0   0   8
                68.82          3.68        1.3642    4   0   0
                71.44          6.78        1.3205    2   0   8
                72.11          6.67        1.3098    1   3   6
                72.11          6.04        1.3098    3   1   6
                75.59          5.56        1.2579    3   3   2
                76.66          5.38        1.2431    4   0   4
                78.37          2.64        1.2201    2   4   0
                78.37          2.58        1.2201    4   2   0
                80.87          4.70        1.1886    2   2   8
                84.00          4.25        1.1521    1   1  10
                85.92          4.01        1.1312    2   4   4
                85.92          4.02        1.1312    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.