Laurelite
      
Diffraction data computed using the structure from the paper listed below, 
along with the cell parameters refined from single crystal data of R100035


Merlino S, Pasero M, Perchiazzi N, Kampf A R
      American Mineralogist 81 (1996) 1277-1281
      Laurelite: Its crystal structure and relationship to alpha-PbF2

      CELL PARAMETERS:  10.2250 10.2250  3.9670   90.000   90.000  120.000
      SPACE GROUP: P-6       

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Pb     0.58450   0.69340   0.50000     1.000     1.295
            Pb     0.57200   0.71000   0.00000     1.000     4.027
            Pb     0.88550   0.59840   0.00000     1.000     1.279
            Pb     0.85300   0.56800   0.50000     1.000     0.158
            Pb     0.00000   0.00000   0.50000     1.000     2.298
            Pb     0.00000   0.00000   0.00000     1.000     3.158
            Cl     0.33333   0.66667   0.00000     1.000     1.737
            Cl     0.66667   0.33333   0.50000     1.000     1.737
            F      0.04800   0.62000   0.50000     1.000     1.421
            F      0.60900   0.57000   0.00000     1.000     1.895
            F      0.07900   0.86800   0.00000     1.000     3.079
            F      0.83400   0.72900   0.50000     1.000     1.658

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  8 +/-  8 +/-  3
            MAX. ABS. INTENSITY / VOLUME**2:      1359.975709    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                24.59          1.04        3.6203    1   0   1
                26.63         99.14        3.3469    1   2   0
                30.28          2.06        2.9517    3   0   0
                43.33          1.02        2.0882    1   3   1
                45.74          9.81        1.9835    0   0   2
                47.03         20.42        1.9323    4   1   0
                53.72         24.57        1.7064    1   2   2
                54.86          9.44        1.6735    2   4   0
                62.96          1.40        1.4762    5   1   1
                67.69         11.25        1.3841    4   1   2
                74.13          6.49        1.2790    2   4   2
                75.09          2.67        1.2650    5   3   0
                75.09          2.63        1.2650    7   0   0
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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.