Prosopite
      Pudovkina Z V, Chernitsova N M, Pyatenko Y A
      Journal of Structural Chemistry 14 (1973) 345-347
      Refinement of the crystalline structure of prosopite, CaAl2F4(OH)4
      _database_code_amcsd 0014057

      CELL PARAMETERS:    6.7600  11.1200   7.3200   90.000   95.000   90.000
      SPACE GROUP: C2/c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    548.159
      Density (g/cm3):      2.835
      MAX. ABS. INTENSITY / VOLUME**2:      13.89616822    
      RIR:      1.596
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                15.38          5.91        5.7603    1   1   0         4
                20.08          7.13        4.4214    0   2   1         4
                20.35        100.00        4.3647    1   1   1         4
                24.41          8.56        3.6461    0   0   2         2
                26.47          7.20        3.3671    2   0   0         2
                27.47         15.42        3.2473    1   3   0         4
                29.29         26.76        3.0490    0   2   2         4
                29.64         12.18        3.0139   -1   3   1         4
                30.60          1.15        2.9212    1   3   1         4
                31.05         12.45        2.8802    2   2   0         4
                32.20          1.30        2.7800    0   4   0         2
                32.56          4.31        2.7497   -2   2   1         4
                37.87          4.96        2.3759    1   3   2         4
                37.92          1.12        2.3727    2   0   2         2
                38.36          2.41        2.3468   -2   2   2         4
                39.14         23.44        2.3018   -1   1   3         4
                40.82         15.85        2.2107    0   4   2         4
                41.02          4.05        2.2004    3   1   0         4
                42.15         26.40        2.1438    2   4   0         4
                43.33          4.85        2.0883   -2   4   1         4
                44.33          1.23        2.0434   -1   5   1         4
                44.72          9.82        2.0265    2   4   1         4
                45.02          3.40        2.0138    1   5   1         4
                45.67          3.64        1.9864   -1   3   3         4
                46.34          9.21        1.9594   -3   1   2         4
                47.34         17.40        1.9201    3   3   0         4
                47.67          4.43        1.9078    1   3   3         4
                50.01         12.54        1.8236    3   3   1         4
                50.03         21.95        1.8230    0   0   4         2
                50.23          2.49        1.8165    3   1   2         4
                50.53          3.52        1.8061    1   5   2         4
                50.83          3.48        1.7962    0   6   1         4
                52.16          3.27        1.7537   -3   3   2         4
                53.87          1.50        1.7020    1   1   4         4
                54.50          5.13        1.6836    4   0   0         2
                55.56          3.37        1.6540   -2   4   3         4
                55.75          3.80        1.6490    3   3   2         4
                56.69          3.75        1.6236    2   6   0         4
                56.87          1.63        1.6190   -1   3   4         4
                56.98          1.20        1.6162   -1   5   3         4
                57.64          5.70        1.5991   -2   6   1         4
                57.80          3.79        1.5951   -2   2   4         4
                58.78          1.97        1.5709    2   6   1         4
                59.01          2.56        1.5653    2   4   3         4
                59.04          6.12        1.5645   -3   3   3         4
                59.15          3.03        1.5619    1   3   4         4
                59.82          1.80        1.5461    1   7   0         4
                60.74          4.15        1.5248    3   5   1         4
                61.01          4.73        1.5187   -1   7   1         4
                65.23          1.97        1.4304    4   2   2         4
                65.33          1.59        1.4284   -2   4   4         4
                67.19          1.18        1.3932    4   4   1         4
                67.37          1.85        1.3900    0   8   0         2
                67.40          1.27        1.3894    1   1   5         4
                68.25          5.32        1.3742   -3   3   4         4
                68.86          2.46        1.3634   -3   5   3         4
                69.52          5.46        1.3522    2   4   4         4
                71.18          2.19        1.3247    2   6   3         4
                73.04          4.29        1.2954    5   1   1         4
                73.96          1.18        1.2816   -4   4   3         4
                74.38          1.72        1.2754    3   3   4         4
                76.76          2.16        1.2417   -4   6   1         4
                76.98          2.06        1.2386   -2   6   4         4
                78.62          2.39        1.2168   -5   1   3         4
                80.29          2.44        1.1957    1   9   1         4
                80.68          1.02        1.1910   -1   7   4         4
                81.06          2.56        1.1864    4   0   4         2
                84.54          1.42        1.1461    0   6   5         4
                85.18          1.06        1.1392   -4   6   3         4
                86.82          1.53        1.1218    3   3   5         4
                87.78          1.05        1.1120    0  10   0         2
                88.99          1.66        1.1000   -6   0   2         2
                89.62          2.68        1.0939   -1   9   3         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.