Gearksutite
      Marchetti F, Perchiazzi N
      American Mineralogist 85 (2000) 231-235
      The crystal structure of gearksutite, CaAlF4(OH).H2O
      _database_code_amcsd 0002346

      CELL PARAMETERS:    4.9400   6.8100   6.9780  101.120   94.860  110.070
      SPACE GROUP: P-1       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    213.435
      Density (g/cm3):      2.723
      MAX. ABS. INTENSITY / VOLUME**2:      7.281673311    
      RIR:      0.871
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                13.11         18.24        6.7546    0   0   1         2
                14.25          9.02        6.2140    0   1   0         2
                16.94         19.83        5.2331    0  -1   1         2
                19.39          7.30        4.5774    1   0   0         2
                19.40        100.00        4.5754   -1   1   0         2
                23.36          9.43        3.8075    1  -1   1         2
                23.61          4.54        3.7690   -1   1   1         2
                25.23         33.51        3.5303    1   0   1         2
                26.39         46.60        3.3773    0   0   2         2
                26.89         33.55        3.3155    0  -1   2         2
                28.15          3.48        3.1705    1   1   0         2
                28.15         23.59        3.1701   -1  -1   1         2
                28.16         38.98        3.1685   -1   2   0         2
                28.64         14.54        3.1173    0  -2   1         2
                28.73          2.19        3.1070    0   2   0         2
                32.72          2.22        2.7366   -1   2   1         2
                32.79          1.67        2.7315    1  -1   2         2
                33.06          8.66        2.7099    0   1   2         2
                33.14          1.55        2.7031   -1   1   2         2
                33.93         12.71        2.6418    1   1   1         2
                36.30          3.58        2.4749    1  -2   2         2
                36.51          1.19        2.4611   -2   1   0         2
                37.87          3.11        2.3760   -2   1   1         2
                39.37         25.57        2.2887    2   0   0         2
                39.39          5.70        2.2877   -2   2   0         2
                39.45          5.72        2.2843   -2   0   1         2
                39.46          4.80        2.2836   -1  -2   1         2
                40.01         13.46        2.2536    2  -1   1         2
                40.05          3.38        2.2515    0   0   3         2
                40.53          4.50        2.2258    1  -3   1         2
                40.65          3.79        2.2193    1   2   0         2
                40.67          3.77        2.2182   -1   3   0         2
                41.51          3.58        2.1755   -1   2   2         2
                41.71         14.12        2.1657   -1   0   3         2
                41.83         21.34        2.1596   -2   2   1         2
                42.51          5.11        2.1267    0  -3   1         2
                42.83         25.15        2.1114   -1  -2   2         2
                43.49         18.00        2.0809    1   1   2         2
                43.50          8.70        2.0803   -1  -1   3         2
                43.69          4.83        2.0717   -2   1   2         2
                43.70          2.27        2.0714    0  -2   3         2
                43.70         16.08        2.0713    0   3   0         2
                43.79          1.82        2.0672    2   0   1         2
                44.66          2.14        2.0290    1  -1   3         2
                44.80          2.11        2.0232    1  -3   2         2
                45.07          2.05        2.0115   -1   1   3         2
                45.20          6.90        2.0062   -1   3   1         2
                46.02          7.82        1.9723    0   1   3         2
                46.10          2.26        1.9689   -2  -1   1         2
                46.12          1.11        1.9682    1   2   1         2
                47.09          5.73        1.9298    2   1   0         2
                47.12         34.36        1.9286   -2   3   0         2
                47.78          2.01        1.9038    2  -2   2         2
                47.85         34.77        1.9008    1   0   3         2
                47.97          1.17        1.8964    2  -3   1         2
                48.29          5.83        1.8845   -2   2   2         2
                48.96          1.84        1.8605    0   3   1         2
                50.02         14.75        1.8236   -1  -2   3         2
                52.11          9.58        1.7551   -2   0   3         2
                52.46         15.31        1.7444    0  -3   3         2
                52.62          1.53        1.7392    1  -3   3         2
                52.67          3.12        1.7379    2  -3   2         2
                52.69         11.04        1.7371    0  -1   4         2
                52.82          2.80        1.7332   -1   2   3         2
                53.93         10.14        1.7001    1  -4   1         2
                54.86          2.58        1.6735   -1  -3   2         2
                54.86          5.21        1.6735    1   2   2         2
                54.97         10.15        1.6705    1   3   0         2
                55.43          1.22        1.6578    0  -2   4         2
                55.79          1.24        1.6477   -2  -1   3         2
                55.82          4.68        1.6470    0   2   3         2
                56.91          2.90        1.6180   -2   3   2         2
                57.08          2.83        1.6135    2  -2   3         2
                57.62          4.03        1.5998   -3   2   1         2
                57.72          5.48        1.5972    2  -1   3         2
                58.20          2.93        1.5853    2   2   0         2
                58.20          6.80        1.5851   -2  -2   2         2
                59.09          2.65        1.5635    3  -2   1         2
                60.02          1.16        1.5413   -1  -2   4         2
                60.04          2.96        1.5409    2   1   2         2
                60.12          1.89        1.5391   -1  -3   3         2
                60.31          1.81        1.5347   -3   1   2         2
                60.73          1.74        1.5251   -3   3   0         2
                61.57          1.43        1.5062    1   0   4         2
                62.26          3.02        1.4912    3  -3   1         2
                62.41          1.42        1.4879    2   0   3         2
                62.44          3.67        1.4872    1  -4   3         2
                63.10          1.44        1.4733    1  -3   4         2
                63.33          1.84        1.4687    2   2   1         2
                63.84         14.09        1.4580   -1   3   3         2
                64.28          1.11        1.4490   -2   1   4         2
                64.87          6.77        1.4374    3  -2   2         2
                67.08          4.91        1.3952   -3   1   3         2
                68.39          2.07        1.3717   -3   0   3         2
                68.55          3.49        1.3689   -3   4   0         2
                68.61          1.78        1.3678   -3  -1   2         2
                68.65          1.84        1.3671    1   3   2         2
                68.91          2.36        1.3627    0  -2   5         2
                69.13          2.26        1.3588   -1  -4   2         2
                69.58          2.05        1.3512   -3   2   3         2
                70.59          2.05        1.3342    1  -5   2         2
                71.44          1.50        1.3205   -2  -2   4         2
                71.84          2.71        1.3141    2   3   0         2
                71.96          1.37        1.3122    3   0   2         2
                72.26          1.21        1.3074   -1  -2   5         2
                72.44          1.13        1.3046    1  -2   5         2
                72.78          1.14        1.2995    1  -1   5         2
                72.79          1.04        1.2992    0   4   2         2
                73.11          1.82        1.2944    2  -5   2         2
                74.81          2.82        1.2692    3  -3   3         2
                75.13          2.64        1.2645    1  -5   3         2
                76.68          1.54        1.2428    0   5   0         2
                76.73          1.97        1.2421   -3   4   2         2
                77.07          4.43        1.2374    2  -4   4         2
                77.58          1.10        1.2306   -4   2   0         2
                77.73          1.33        1.2286   -4   2   1         2
                77.81          1.50        1.2275   -2   1   5         2
                78.06          1.11        1.2243   -3  -2   2         2
                78.09          1.79        1.2238   -2   4   3         2
                79.37          1.31        1.2073   -4   1   0         2
                79.40          2.01        1.2069    1   2   4         2
                79.85          1.57        1.2012   -1  -4   4         2
                80.80          1.45        1.1894    3   1   2         2
                80.86          1.19        1.1888   -1   2   5         2
                81.13          2.72        1.1854   -4   1   2         2
                82.11          1.17        1.1738    0   5   1         2
                83.45          1.29        1.1583   -1   5   2         2
                83.57          1.26        1.1569    0  -1   6         2
                84.25          3.24        1.1493    0  -2   6         2
                84.77          1.93        1.1437    3   2   1         2
                84.98          1.49        1.1414   -2  -4   1         2
                85.36          2.67        1.1372   -1   0   6         2
                86.34          2.69        1.1268    4  -2   2         2
                88.78          2.22        1.1020   -3   1   5         2
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.