Sewardite
      Roberts A C, Cooper M A, Hawthorne F C, Criddle A J, Stirling J A R
      The Canadian Mineralogist 40 (2002) 1191-1198
      Sewardite, CaFe2(AsO4)2(OH)2, the Ca-analogue of carminite,
      from Tsumeb, Namibia: Description and crystal structure
      Locality: Tsumeb, Namibia
      _database_code_amcsd 0005788

      CELL PARAMETERS:   16.4610   7.4340  12.1310   90.000   90.000   90.000
      SPACE GROUP: Cccm      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1484.484
      Density (g/cm3):      4.130
      MAX. ABS. INTENSITY / VOLUME**2:      18.58487346    
      RIR:      1.465
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                13.07         16.46        6.7751    1   1   0         4
                14.60          1.02        6.0655    0   0   2         2
                18.17         76.89        4.8828    2   0   2         4
                19.64         11.58        4.5191    1   1   2         8
                20.11          1.65        4.4147    3   1   0         4
                24.95          4.91        3.5694    3   1   2         8
                25.66         52.09        3.4722    1   1   3         8
                26.31         46.66        3.3876    2   2   0         4
                27.33         34.41        3.2627    2   2   1         8
                28.16        100.00        3.1693    0   2   2         4
                29.45         14.99        3.0327    0   0   4         2
                29.68         52.97        3.0102    5   1   0         4
                29.97         53.82        2.9819    3   1   3         8
                30.60         70.39        2.9216    5   1   1         8
                32.34         22.21        2.7681    1   1   4         8
                32.46          1.39        2.7584    4   2   0         4
                33.23         31.34        2.6964    5   1   2         8
                34.54         19.76        2.5968    2   2   3         8
                35.76         55.99        2.5109    4   2   2         8
                35.93         38.02        2.4997    3   1   4         8
                35.93          1.85        2.4997    6   0   2         4
                36.67          1.94        2.4504    1   3   0         4
                36.81         16.35        2.4414    4   0   4         4
                37.24          8.22        2.4146    5   1   3         8
                37.44          3.48        2.4019    1   3   1         8
                39.45          6.79        2.2842    1   1   5         8
                39.67          1.52        2.2720    1   3   2         8
                39.92          2.12        2.2584    3   3   0         4
                40.64          5.57        2.2202    3   3   1         8
                40.88          4.50        2.2073    6   2   0         4
                40.93          5.60        2.2047    7   1   1         8
                41.59         17.43        2.1717    6   2   1         8
                42.30          5.95        2.1365    5   1   4         8
                42.52         11.73        2.1263    3   1   5         8
                43.01          4.14        2.1030    7   1   2         8
                44.01          4.95        2.0576    8   0   0         2
                46.01          3.95        1.9725    2   2   5         8
                46.24          2.91        1.9635    2   0   6         4
                46.47          5.97        1.9540    5   3   1         8
                46.89          7.02        1.9375    6   2   3         8
                46.90          4.22        1.9374    1   1   6         8
                47.72          2.89        1.9060    1   3   4         8
                48.17         10.18        1.8890    5   1   5         8
                48.36          5.65        1.8821    5   3   2         8
                49.01          5.54        1.8585    0   4   0         2
                49.59          2.89        1.8382    3   1   6         8
                50.28          1.53        1.8147    4   0   6         4
                50.38          4.38        1.8113    3   3   4         8
                51.39         21.22        1.7781    5   3   3         8
                51.45         12.10        1.7761    0   2   6         4
                52.70          6.86        1.7369    2   4   2         8
                53.06          1.90        1.7258    8   2   2         8
                53.78          3.49        1.7045    9   1   2         8
                53.84         11.63        1.7027    8   0   4         4
                54.15         28.03        1.6938    4   4   0         4
                54.69          4.91        1.6784    5   1   6         8
                55.42         29.95        1.6578    5   3   4         8
                56.00          2.38        1.6421    7   3   2         8
                56.35          1.36        1.6327    6   2   5         8
                56.43          6.98        1.6307    4   2   6         8
                56.54          1.40        1.6276    6   0   6         4
                56.60          8.94        1.6261    9   1   3         8
                58.06          4.71        1.5886   10   0   2         4
                58.22         21.58        1.5846    0   4   4         4
                58.75          5.99        1.5716    7   3   3         8
                59.96          6.93        1.5428    2   2   7         8
                60.34         10.66        1.5339    5   3   5         8
                60.40         15.62        1.5326    9   1   4         8
                61.11         20.71        1.5164    0   0   8         2
                61.62          6.72        1.5051   10   2   0         4
                61.77          9.10        1.5019    5   1   7         8
                61.79          1.20        1.5015    7   1   6         8
                62.15          3.05        1.4937   10   2   1         8
                62.47          8.05        1.4867    7   3   4         8
                62.75          1.13        1.4808    1   5   0         4
                63.19          4.33        1.4716    9   3   0         4
                63.27          3.04        1.4699    1   5   1         8
                63.70          2.45        1.4609    9   3   1         8
                63.92          1.79        1.4564   11   1   1         8
                64.40          1.21        1.4467   10   0   4         4
                64.81          1.50        1.4385    1   5   2         8
                64.99          1.01        1.4350    3   5   0         4
                65.09          4.04        1.4331    9   1   5         8
                65.24          6.13        1.4301    9   3   2         8
                65.50          2.77        1.4251    3   5   1         8
                66.03          1.25        1.4149    1   3   7         8
                66.05          4.45        1.4146    5   3   6         8
                66.26          1.63        1.4106   10   2   3         8
                67.07          3.00        1.3954    7   3   5         8
                67.70          4.82        1.3840    2   2   8         8
                67.97          3.78        1.3792    8   4   0         4
                67.98          1.43        1.3791   11   1   3         8
                68.21          2.22        1.3749    3   3   7         8
                68.36          1.09        1.3722    6   4   4         8
                68.39          2.74        1.3717   12   0   0         2
                68.42          3.09        1.3712    7   1   7         8
                68.88          5.37        1.3631    6   2   7         8
                69.40          6.85        1.3543    5   1   8         8
                69.66          1.52        1.3497    2   4   6         8
                69.75         13.82        1.3482   10   2   4         8
                69.85          1.57        1.3467    5   5   1         8
                69.97          1.28        1.3445    8   2   6         8
                70.59          4.02        1.3343    9   1   6         8
                71.32          1.45        1.3224    5   5   2         8
                71.43          3.90        1.3206   11   1   4         8
                72.48          1.05        1.3040    5   3   7         8
                72.50          2.87        1.3037    7   3   6         8
                73.74          6.50        1.2848    5   5   3         8
                74.30          2.30        1.2765   10   0   6         4
                75.52          2.79        1.2589   12   2   2         8
                77.09          5.66        1.2372    5   5   4         8
                77.61          3.09        1.2302    5   1   9         8
                77.99          1.81        1.2252    2   6   0         4
                78.46          2.65        1.2190    2   6   1         8
                78.85          6.17        1.2139    0   6   2         4
                79.35          5.36        1.2076   10   4   2         8
                79.94          1.85        1.2001    2   0  10         4
                79.94          2.64        1.2001    7   5   3         8
                80.77          1.85        1.1898    9   3   6         8
                81.33          3.63        1.1830    5   5   5         8
                82.01          1.96        1.1749    0   4   8         4
                82.92          1.66        1.1643    4   6   2         8
                83.22          1.67        1.1610    7   5   4         8
                83.81          3.64        1.1543   14   0   2         4
                83.86          1.24        1.1537    9   5   0         4
                83.90          4.37        1.1532    0   2  10         4
                84.32          1.14        1.1485    9   5   1         8
                85.16          1.01        1.1394    8   4   6         8
                85.44          1.92        1.1364   10   2   7         8
                85.72          1.26        1.1334    9   5   2         8
                86.06          9.91        1.1298    4   4   8         8
                86.27          1.04        1.1276   13   3   0         4
                86.44          1.56        1.1258    1   5   7         8
                86.45          2.00        1.1256    5   5   6         8
                86.50          2.00        1.1252    5   1  10         8
                86.83          1.49        1.1217    9   3   7         8
                86.89          2.72        1.1210   14   2   0         4
                87.02          1.03        1.1197   11   1   7         8
                87.36          1.27        1.1163   14   2   1         8
                87.40          1.35        1.1159    7   5   5         8
                87.56          1.33        1.1142    5   3   9         8
                87.93          4.04        1.1105    4   2  10         8
                88.45          1.59        1.1053    3   5   7         8
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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.