Zircon
      Diffraction data computed using the structure from the paper listed below, 
      along with the cell parameters refined from single crystal data of X050183 
      Finch R J, Hanchar J M, Hoskin P W O, Burns P C
      American Mineralogist 86 (2001) 681-689
      Rare-earth elements in synthetic zircon: Part 2. A single-crystal
      X-ray study of xenotime substitution
      Sample: Dy (12)

      CELL PARAMETERS:   6.6102  6.6102  5.9860   90.000   90.000   90.000
      ALTERNATE SETTING FOR SPACE GROUP: I4_1/amd  

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Si     0.00000   0.75000   0.62500     1.000     0.500
            Zr     0.00000   0.75000   0.12500     1.000     1.000
            O      0.00000   0.06580   0.19550     1.000     0.658

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  6 +/-  6 +/-  5
            MAX. ABS. INTENSITY / VOLUME**2:      71.92813965    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                20.01         42.40        4.4370    1   0   1
                26.98        100.00        3.3051    2   0   0
                33.82          6.94        2.6506    2   1   1
                35.62         56.52        2.5205    1   1   2
                38.52         12.16        2.3371    2   2   0
                40.67          6.18        2.2185    2   0   2
                43.78         19.44        2.0678    3   0   1
                47.60         12.74        1.9102    1   0   3
                52.18         12.99        1.7530    3   2   1
                53.47         50.29        1.7137    3   1   2
                55.57          2.93        1.6539    2   1   3
                55.62         13.90        1.6525    4   0   0
                59.71          2.18        1.5486    4   1   1
                62.01          2.70        1.4965    0   0   4
                62.83          2.45        1.4790    3   0   3
                62.87          8.57        1.4781    4   2   0
                67.81         15.14        1.3820    3   3   2
                68.87          8.87        1.3633    2   0   4
                73.34          4.24        1.2909    4   3   1
                75.43          7.54        1.2603    2   2   4
                76.17          1.93        1.2498    4   1   3
                80.79          7.76        1.1896    5   1   2
                82.56          2.42        1.1685    4   4   0
                88.01          1.92        1.1097    2   1   5
                88.05          4.06        1.1093    4   0   4
                88.78          1.54        1.1021    5   0   3
                88.81          3.83        1.1017    6   0   0
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.