Lazulite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R050269
      Giuseppetti G, Tadini C
      Neues Jahrbuch fur Mineralogie, Monatshefte 1983 (1983) 410-416
      Lazulite, (Mg,Fe)Al2(OH)2(PO4)2: structure refinement and hydrogen bonding
      Locality: Graves Mountain, Lincoln County, Georgia, USA

      CELL PARAMETERS:   7.144000   7.278000   7.228000   90.00000   120.5100   90.00000
      SPACE GROUP: P2_1/c
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                14.41          6.53        6.1579    1   0   0
                18.74          8.88        4.7408   -1   1   1
                18.76          6.24        4.7354    0   1   1
                18.90          7.11        4.7027    1   1   0
                24.46          1.93        3.6421    0   2   0
                24.63          2.33        3.6175   -1   0   2
                27.55        100.00        3.2399   -1   1   2
                27.82          4.49        3.2086   -2   1   1
                27.87         60.76        3.2036    1   1   1
                28.40         53.32        3.1445    0   2   1
                28.49          6.00        3.1348    1   2   0
                28.61         11.94        3.1221   -2   0   2
                29.02         39.93        3.0790    2   0   0
                34.97          4.32        2.5666   -1   2   2
                35.19         24.89        2.5509   -2   2   1
                38.29          1.34        2.3513    2   2   0
                38.36          1.58        2.3473   -3   0   2
                38.44          1.04        2.3421    1   0   2
                39.85          4.35        2.2624    0   3   1
                39.92          6.91        2.2588    1   3   0
                40.05          4.42        2.2517   -2   1   3
                40.38          1.96        2.2341   -3   1   2
                40.61          3.92        2.2221   -3   1   1
                40.66          3.49        2.2194    2   1   1
                44.12          2.80        2.0526    3   0   0
                44.97          6.15        2.0160   -1   3   2
                45.18          7.50        2.0072    1   3   1
                45.32          4.04        2.0013   -3   1   3
                45.71         12.61        1.9851   -2   2   3
                45.94          9.64        1.9757    3   1   0
                46.25          6.77        1.9628    2   2   1
                50.09          5.70        1.8210    0   4   0
                50.45          8.22        1.8087   -2   0   4
                50.58          6.97        1.8045    0   2   3
                51.11          4.63        1.7870   -4   0   2
                52.71          1.84        1.7365   -3   0   4
                54.12          1.30        1.6944   -1   3   3
                54.37          1.81        1.6872   -1   1   4
                54.42          1.06        1.6857    1   3   2
                54.79          2.02        1.6752    1   1   3
                55.21          2.08        1.6636    3   1   1
                56.82         13.63        1.6200   -2   2   4
                57.53          9.67        1.6018    2   2   2
                58.39          5.47        1.5803   -3   3   3
                58.68          6.43        1.5730   -2   4   2
                58.71         18.01        1.5722    0   4   2
                58.91          9.41        1.5676    3   3   0
                58.91          1.81        1.5674    2   4   0
                58.97          1.49        1.5659   -1   2   4
                59.17          5.91        1.5611   -4   0   4
                59.26          3.13        1.5591   -4   2   3
                59.30          1.59        1.5580    0   0   4
                59.71          4.14        1.5482   -4   2   1
                60.09         11.57        1.5395    4   0   0
                64.78          1.31        1.4388   -3   4   2
                65.81          1.06        1.4187   -1   5   1
                66.20          4.64        1.4113   -1   3   4
                66.25          3.37        1.4103   -3   1   5
                66.58          2.01        1.4042    1   3   3
                67.26          1.60        1.3916   -5   1   2
                67.38          3.53        1.3894    3   1   2
                69.54          2.82        1.3514   -1   5   2
                70.43          2.45        1.3365   -2   2   5
                70.49          1.36        1.3355   -5   1   4
                71.26          2.39        1.3229    2   2   3
                74.12          2.07        1.2787   -4   2   5
                74.34         15.19        1.2755   -4   4   2
                74.43          4.00        1.2742    2   4   2
                74.52          1.50        1.2729   -5   2   4
                75.35          1.63        1.2609    4   2   1
                76.79          1.03        1.2408   -2   5   3
                80.43          2.44        1.1935   -3   5   3
                80.88          1.79        1.1880    3   5   0
                81.08          3.37        1.1856   -5   3   4
                81.22          1.30        1.1839    0   4   4
                81.25          2.85        1.1836    1   3   4
                81.61          1.35        1.1793    0   2   5
                82.30          1.00        1.1710    2   0   4
                87.45          4.09        1.1148    2   2   4
                87.73          2.86        1.1120    1   5   3
                89.60          1.94        1.0935    5   1   1
                89.60          1.94        1.0935    5   1   1
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.