Diaspore
Diffraction data computed using the structure from the paper listed below, 
along with the cell parameters refined from the powder pattern of R060546
      Hill R J
      Physics and Chemistry of Minerals 5 (1979) 179-200
      Crystal structure refinement and electron density distribution in diaspore
      Sample: Neutral atom refinement

      CELL PARAMETERS:   4.4035  9.4324  2.8475   90.000   90.000   90.000
      SPACE GROUP: Pbnm      

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Al     0.04476  -0.14456  -0.25000     1.000     0.243
            O      0.71228   0.19882  -0.25000     1.000     0.308
            O      0.19698   0.05350  -0.25000     1.000     0.320
            H      0.40950   0.08760  -0.25000     1.000     1.390

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  4 +/-  8 +/-  2
            MAX. ABS. INTENSITY / VOLUME**2:      12.47238279    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                18.82          8.00        4.7162    0   2   0
                22.28        100.00        3.9901    1   1   0
                27.72          6.42        3.2186    1   2   0
                35.07         24.94        2.5588    1   3   0
                36.87          1.73        2.4377    0   2   1
                37.62          3.98        2.3911    1   0   1
                38.16          8.51        2.3581    0   4   0
                38.85         63.12        2.3178    1   1   1
                42.38         46.19        2.1327    1   2   1
                43.54         46.32        2.0788    1   4   0
                47.79          1.75        1.9033    1   3   1
                50.23          5.21        1.8162    0   4   1
                52.79          1.39        1.7341    1   5   0
                53.50         15.71        1.7128    2   1   1
                54.67          2.55        1.6790    1   4   1
                56.30         50.49        1.6339    2   2   1
                57.25         12.64        1.6093    2   4   0
                58.73          2.29        1.5721    0   6   0
                60.79          5.76        1.5236    2   3   1
                62.73         24.37        1.4810    1   5   1
                65.11          5.73        1.4326    2   5   0
                65.57         16.88        1.4238    0   0   2
                66.74          3.50        1.4015    3   2   0
                66.77          3.31        1.4010    2   4   1
                68.13         19.52        1.3763    0   6   1
                70.19          6.59        1.3410    1   1   2
                70.85          7.62        1.3300    3   3   0
                72.44          4.75        1.3047    3   0   1
                73.24          1.68        1.2924    3   1   1
                73.50          5.48        1.2885    1   7   0
                74.11          1.96        1.2794    2   6   0
                75.62          4.42        1.2575    3   2   1
                76.58          5.53        1.2441    1   3   2
                78.47          2.26        1.2188    0   4   2
                79.54          5.21        1.2051    3   3   1
                82.03          7.62        1.1747    1   4   2
                84.95          3.18        1.1416    3   4   1
                88.90          1.06        1.1009    4   0   0
                89.66          4.84        1.0935    4   1   0
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.