Trembathite
      Schindler M, Hawthorne F C
      The Canadian Mineralogist 36 (1998) 1195-1201
      The crystal structure of trembathite, (Mg1.55Fe1.43Mn0.02)B7O13Cl, a mineral of
      the boracite group: An example of the insertion of a cluster into a three-dimensional net
      _database_code_amcsd 0005564

      CELL PARAMETERS:    8.5880   8.5880  21.0500   90.000   90.000  120.000
      SPACE GROUP: R3c       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1344.519
      Density (g/cm3):      3.241
      MAX. ABS. INTENSITY / VOLUME**2:      12.91750487    
      RIR:      1.298
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                14.58         11.31        6.0740    0   1   2         3
                20.68         11.90        4.2959    1   0   4         3
                20.69          2.64        4.2940    1   1   0         6
                25.39         28.61        3.5083    0   0   6         1
                25.40         14.41        3.5063    2   0   2         3
                29.41        100.00        3.0370    0   2   4         3
                32.97         23.97        2.7168    1   1   6         6
                32.98         36.29        2.7159    1   2   2         6
                36.21          1.46        2.4806    0   1   8         3
                36.23         15.19        2.4791    3   0   0         3
                42.07         24.59        2.1479    2   0   8         3
                42.09         23.30        2.1470    2   2   0         6
                44.09         13.89        2.0540    1   1   9         6
                44.10         16.79        2.0536    2   1   7         6
                44.11         12.77        2.0530    2   2   3         6
                44.11         14.90        2.0529    1   3   1         6
                44.76          7.40        2.0247    0   3   6         3
                44.76          1.38        2.0247    3   0   6         3
                44.77          1.37        2.0243    3   1   2         6
                47.32          4.88        1.9210    1   2   8         6
                47.33          1.08        1.9205    1   3   4         6
                49.77         17.22        1.8319    0   2  10         3
                49.79         13.50        1.8313    2   2   6         6
                49.80          8.18        1.8310    0   4   2         3
                52.14          4.17        1.7542    0   0  12         1
                52.17         20.33        1.7531    4   0   4         3
                54.46          7.63        1.6850    2   1  10         6
                54.48         11.08        1.6843    2   3   2         6
                56.68          1.51        1.6239    1   1  12         6
                56.72          7.05        1.6231    3   2   4         6
                56.72          3.32        1.6230    4   1   0         6
                58.33          1.63        1.5819    1   2  11         6
                58.34          1.28        1.5817    2   2   9         6
                58.35          1.50        1.5813    2   3   5         6
                58.36          1.42        1.5812    1   4   3         6
                61.02          5.15        1.5185    0   4   8         3
                63.08          2.87        1.4738    0   1  14         3
                63.10          1.90        1.4733    1   3  10         6
                63.12          3.76        1.4730    1   4   6         6
                63.12          4.59        1.4730    4   1   6         6
                63.12          3.64        1.4728    5   0   2         3
                65.15          2.39        1.4320    3   0  12         3
                65.15          1.61        1.4320    0   3  12         3
                65.16          2.44        1.4316    2   3   8         6
                65.17          2.99        1.4314    0   5   4         3
                66.66          1.08        1.4031    2   1  13         6
                67.15          4.25        1.3939    2   0  14         3
                67.17          2.84        1.3936    4   0  10         3
                67.19          1.21        1.3932    4   2   2         6
                69.15          8.74        1.3584    2   2  12         6
                69.18          8.22        1.3579    2   4   4         6
                73.04          1.34        1.2955    1   0  16         3
                73.08          3.38        1.2949    5   0   8         3
                76.86          4.01        1.2403    0   2  16         3
                76.90          9.88        1.2398    4   2   8         6
                76.91          3.89        1.2396    6   0   0         3
                80.65          2.11        1.1913    1   4  12         6
                80.67          1.40        1.1911    1   5   8         6
                82.54          1.28        1.1688    6   0   6         3
                86.22          1.76        1.1281    2   3  14         6
                86.25          1.09        1.1277    2   5   6         6
                88.06          1.81        1.1092    1   3  16         6
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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.