Congolite
      Dowty E, Clark J R
      Zeitschrift fur Kristallographie 138 (1973) 64-99
      Crystal-structure refinements for orthorhombic boracite,
      Mg3B7O13Cl, and a trigonal, iron-rich analogue
      Locality: Bischofferode, Thuringen, Germany
      _database_code_amcsd 0010745

      CELL PARAMETERS:    8.6120   8.6120  21.0650   90.000   90.000  120.000
      SPACE GROUP: R3c       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1353.007
      Density (g/cm3):      3.444
      MAX. ABS. INTENSITY / VOLUME**2:      16.96706201    
      RIR:      1.604
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                14.55          9.11        6.0867    0   1   2         3
                20.63          4.16        4.3060    1   1   0         6
                20.65         14.51        4.3019    1   0   4         3
                25.34         19.49        3.5153    2   0   2         3
                25.37         32.07        3.5108    0   0   6         1
                29.35        100.00        3.0434    0   2   4         3
                32.89         35.53        2.7231    1   2   2         6
                32.92         22.91        2.7210    1   1   6         6
                36.13         15.35        2.4861    3   0   0         3
                41.96         24.22        2.1530    2   2   0         6
                42.00         26.04        2.1510    2   0   8         3
                43.98         10.45        2.0586    1   3   1         6
                43.99          9.44        2.0584    2   2   3         6
                44.01         13.03        2.0573    2   1   7         6
                44.03         10.29        2.0564    1   1   9         6
                44.64          1.44        2.0298    3   1   2         6
                44.66          8.30        2.0289    0   3   6         3
                44.66          2.25        2.0289    3   0   6         3
                47.21          1.05        1.9253    1   3   4         6
                47.24          5.20        1.9242    1   2   8         6
                49.66          8.70        1.8360    0   4   2         3
                49.67         15.61        1.8354    2   2   6         6
                49.71         17.49        1.8341    0   2  10         3
                52.03         19.65        1.7576    4   0   4         3
                52.10          4.14        1.7554    0   0  12         1
                54.32         11.88        1.6889    2   3   2         6
                54.37          7.71        1.6874    2   1  10         6
                56.55          3.12        1.6275    4   1   0         6
                56.56          7.41        1.6273    3   2   4         6
                56.62          1.62        1.6255    1   1  12         6
                58.19          1.02        1.5855    1   4   3         6
                58.20          1.14        1.5853    2   3   5         6
                58.22          1.01        1.5846    2   2   9         6
                58.24          1.30        1.5841    1   2  11         6
                60.88          5.23        1.5217    0   4   8         3
                62.93          3.81        1.4769    5   0   2         3
                62.95          3.18        1.4766    1   4   6         6
                62.95          4.71        1.4766    4   1   6         6
                62.98          1.37        1.4759    1   3  10         6
                63.02          2.56        1.4749    0   1  14         3
                64.98          3.41        1.4352    0   5   4         3
                65.00          3.08        1.4347    2   3   8         6
                65.04          1.75        1.4340    0   3  12         3
                65.04          2.28        1.4340    3   0  12         3
                66.99          1.54        1.3970    4   2   2         6
                67.03          3.12        1.3962    4   0  10         3
                67.08          4.32        1.3953    2   0  14         3
                68.97          7.54        1.3615    2   4   4         6
                69.03          8.37        1.3605    2   2  12         6
                72.88          3.44        1.2979    5   0   8         3
                72.97          1.14        1.2965    1   0  16         3
                76.66          3.46        1.2430    6   0   0         3
                76.69          8.24        1.2426    4   2   8         6
                76.77          3.85        1.2415    0   2  16         3
                80.44          1.15        1.1939    1   5   8         6
                80.47          1.98        1.1935    1   4  12         6
                82.35          1.10        1.1709    0   4  14         3
                85.98          1.17        1.1306    2   5   6         6
                86.05          1.81        1.1299    2   3  14         6
                87.91          1.49        1.1107    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.