Spiroffite
      Cooper M A, Hawthorne F C
      The Canadian Mineralogist 34 (1996) 821-826
      The crystal structure of spiroffite
      Locality: Moctezuma, Sonora, Mexico
      _database_code_amcsd 0005504

      CELL PARAMETERS:   12.8700   5.3813  11.8880   90.000   98.220   90.000
      SPACE GROUP: C2/c      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    814.872
      Density (g/cm3):      5.058
      MAX. ABS. INTENSITY / VOLUME**2:      52.06888459    
      RIR:      3.352
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                13.90          9.24        6.3689    2   0   0         2
                17.89         76.62        4.9571    1   1   0         4
                19.04         27.78        4.6620   -1   1   1         4
                19.82          9.08        4.4799    1   1   1         4
                21.99         58.10        4.0429    2   0   2         2
                24.11          3.59        3.6909    1   1   2         4
                26.97         94.77        3.3059   -3   1   1         4
                28.22          1.24        3.1625   -1   1   3         4
                28.64          3.11        3.1167    3   1   1         4
                29.27          5.00        3.0507   -3   1   2         4
                29.82        100.00        2.9957    1   1   3         4
                29.94         33.39        2.9848   -4   0   2         2
                31.63         40.95        2.8288   -2   0   4         2
                32.32         18.51        2.7698    3   1   2         4
                33.26          2.65        2.6934   -3   1   3         4
                33.30         12.11        2.6906    0   2   0         2
                33.87         13.80        2.6466    4   0   2         2
                34.58         12.75        2.5938   -1   1   4         4
                35.40          1.00        2.5360    2   0   4         2
                36.24          2.05        2.4785    2   2   0         4
                36.37          3.04        2.4700    1   1   4         4
                36.63         24.00        2.4530   -2   2   1         4
                37.31          1.87        2.4099    3   1   3         4
                38.48          2.97        2.3396   -3   1   4         4
                38.63          4.47        2.3310   -2   2   2         4
                38.87         11.63        2.3168   -5   1   1         4
                40.17         10.71        2.2449   -5   1   2         4
                40.26          1.87        2.2399    2   2   2         4
                40.66         24.26        2.2187    0   2   3         4
                40.90         20.54        2.2066    5   1   1         4
                42.03          2.03        2.1499   -2   2   3         4
                42.59          1.20        2.1230    6   0   0         2
                43.19          8.41        2.0948   -6   0   2         2
                43.25          1.58        2.0921    3   1   4         4
                44.02          1.43        2.0570   -4   2   1         4
                44.06          1.35        2.0552    4   2   0         4
                44.31         10.00        2.0445    2   2   3         4
                44.57          8.34        2.0329   -3   1   5         4
                44.84          1.76        2.0215    4   0   4         2
                45.38          5.88        1.9985   -4   2   2         4
                45.50          4.66        1.9936    4   2   1         4
                46.59         14.28        1.9496   -2   2   4         4
                47.57          3.17        1.9116    6   0   2         2
                48.23          6.51        1.8868    4   2   2         4
                49.88         10.77        1.8281    3   1   5         4
                50.63         11.12        1.8031    2   0   6         2
                51.03          4.08        1.7897    1   1   6         4
                51.45          8.85        1.7762    1   3   0         4
                51.84         11.10        1.7636   -5   1   5         4
                51.87          3.53        1.7628   -4   2   4         4
                52.24          1.35        1.7512    1   3   1         4
                52.61          1.50        1.7397   -7   1   1         4
                53.13          2.62        1.7238    7   1   0         4
                53.62          1.71        1.7091    5   1   4         4
                54.86          1.09        1.6734    7   1   1         4
                55.23         13.64        1.6633   -7   1   3         4
                55.31          2.36        1.6610    2   2   5         4
                55.62          1.35        1.6524    3   3   0         4
                56.64          9.18        1.6250    6   2   1         4
                56.68         13.64        1.6240   -4   2   5         4
                56.68          1.39        1.6239    3   3   1         4
                56.85         17.83        1.6195   -1   1   7         4
                57.01          6.85        1.6153    6   0   4         2
                57.61          3.48        1.5999   -6   2   3         4
                57.79          2.28        1.5955   -8   0   2         2
                57.92          5.74        1.5922    8   0   0         2
                58.72          1.20        1.5724    4   0   6         2
                58.89         15.64        1.5682    3   3   2         4
                59.30          3.56        1.5583    6   2   2         4
                59.42          5.31        1.5556   -6   0   6         2
                59.70          3.07        1.5488    5   1   5         4
                60.33          7.92        1.5341   -1   3   4         4
                61.64          1.55        1.5048    7   1   3         4
                61.95          3.16        1.4978    2   2   6         4
                62.16          3.01        1.4933    3   3   3         4
                62.20          1.66        1.4924   -8   0   4         2
                62.31          2.71        1.4901   -7   1   5         4
                62.70          6.08        1.4817    4   2   5         4
                62.78          1.02        1.4802   -2   0   8         2
                62.97          2.13        1.4761   -3   3   4         4
                63.00          1.42        1.4754    6   2   3         4
                63.24          1.83        1.4703   -5   3   1         4
                64.17          8.39        1.4514   -5   3   2         4
                65.17          1.26        1.4315   -1   3   5         4
                65.32          4.85        1.4285   -2   2   7         4
                65.47          2.79        1.4255    0   2   7         4
                66.06          3.84        1.4144   -4   0   8         2
                66.48          1.37        1.4065    7   1   4         4
                66.55          1.10        1.4051   -3   1   8         4
                67.29          1.92        1.3915   -7   1   6         4
                67.65          1.93        1.3849    6   2   4         4
                67.83          2.30        1.3817   -9   1   1         4
                67.88          2.05        1.3807   -8   2   1         4
                68.35          1.44        1.3724   -8   2   2         4
                68.47          1.56        1.3703    8   2   0         4
                69.20          1.98        1.3576    4   2   6         4
                69.84          1.33        1.3467   -6   2   6         4
                69.87          3.08        1.3462   -8   2   3         4
                70.33          1.09        1.3385    9   1   1         4
                71.95          5.19        1.3124   -2   4   1         4
                72.18          2.22        1.3087    7   1   5         4
                72.51          4.40        1.3036    1   3   6         4
                73.12          1.33        1.2942    9   1   2         4
                74.00          1.16        1.2811    5   1   7         4
                74.24          2.71        1.2774    7   3   0         4
                74.57          2.89        1.2725    0   4   3         4
                74.65          2.35        1.2714    5   3   4         4
                74.89          1.99        1.2680    4   0   8         2
                76.02          1.81        1.2520   -4   2   8         4
                76.36          1.76        1.2471    1   1   9         4
                76.39          1.45        1.2467    8   2   3         4
                76.88          2.46        1.2401    9   1   3         4
                77.25          1.43        1.2351  -10   0   4         2
                79.18          1.62        1.2097   10   0   2         2
                79.49          2.58        1.2057   -5   1   9         4
                81.87          2.96        1.1766    0   0  10         2
                82.17          1.45        1.1731    3   1   9         4
                83.02          1.63        1.1632    4   4   3         4
                83.26          2.08        1.1604  -10   2   1         4
                84.90          1.20        1.1422  -11   1   1         4
                84.97          2.74        1.1415   -9   1   7         4
                85.80          1.47        1.1325   -8   2   7         4
                85.94          1.16        1.1310    7   3   4         4
                85.97          2.53        1.1307    2   2   9         4
                86.01          3.68        1.1303   -3   3   8         4
                86.09          1.99        1.1294    7   1   7         4
                86.69          2.56        1.1232   -7   3   6         4
                86.71          1.90        1.1229    6   4   1         4
                86.75          3.30        1.1226   -4   4   5         4
                86.76          1.07        1.1225  -10   2   4         4
                86.78          1.44        1.1222    6   2   7         4
                87.20          1.09        1.1179    9   1   5         4
                87.77          1.41        1.1121   11   1   1         4
                87.87          1.08        1.1111    9   3   0         4
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.