Gaudefroyite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R050675
      Hoffmann C, Armbruster T, Kunz M
      European Journal of Mineralogy 9 (1997) 7-19
      Structure refinement of (001) disordered gaudefroyite Ca4Mn3[(BO3)3(CO3)O3]:
      Jahn-Teller-distortion in edge-sharing chains of MnO6 octahedra

      CELL PARAMETERS:   10.60157   10.60157   5.885479   90.00000   90.00000   120.0000
      SPACE GROUP: P6_3/m
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                 9.70         40.55        9.1812    1   0   0
                16.79          8.14        5.3008    1   1   0
                17.97         14.82        4.9548    1   0   1
                19.40         69.87        4.5906    2   0   0
                22.63          2.40        3.9388    1   1   1
                24.65          5.12        3.6197    2   0   1
                25.73          1.64        3.4702    1   2   0
                29.23         11.79        3.0604    3   0   0
                29.94         36.19        2.9893    1   2   1
                29.94          7.66        2.9893    2   1   1
                31.99          3.60        2.8023    1   0   2
                33.04         21.54        2.7153    3   0   1
                33.87         64.41        2.6504    2   2   0
                35.29          7.27        2.5464    1   3   0
                35.29          4.30        2.5464    3   1   0
                36.31        100.00        2.4774    2   0   2
                37.25          4.23        2.4167    2   2   1
                38.57         13.12        2.3371    1   3   1
                38.57          4.11        2.3371    3   1   1
                39.30          5.04        2.2953    4   0   0
                40.22         10.81        2.2444    1   2   2
                40.22          6.08        2.2444    2   1   2
                42.31          7.94        2.1384    4   0   1
                42.66          7.50        2.1212    3   0   2
                42.98          5.87        2.1063    2   3   0
                42.98          5.78        2.1063    3   2   0
                45.79          3.67        1.9831    2   3   1
                47.24         12.79        1.9256    3   1   2
                47.42          6.52        1.9185    1   0   3
                48.00          6.75        1.8966    1   4   1
                48.00          1.31        1.8966    4   1   1
                49.58          1.66        1.8399    1   1   3
                49.68          9.80        1.8362    5   0   0
                50.46         43.98        1.8099    4   0   2
                50.63          2.50        1.8040    2   0   3
                52.21          8.60        1.7529    5   0   1
                52.79          7.51        1.7351    4   2   0
                53.53          2.53        1.7128    2   3   2
                53.53          9.88        1.7128    3   2   2
                53.70          3.14        1.7078    1   2   3
                53.70          1.55        1.7078    2   1   3
                55.22          2.26        1.6643    4   2   1
                55.51          1.45        1.6561    1   4   2
                55.51          5.10        1.6561    4   1   2
                55.68          3.11        1.6516    3   0   3
                55.77          2.30        1.6490    1   5   0
                55.77          4.80        1.6490    5   1   0
                58.12          5.68        1.5879    5   1   1
                59.50          1.09        1.5541    1   3   3
                60.53         13.75        1.5302    6   0   0
                61.21          2.81        1.5148    3   3   2
                61.45          1.52        1.5094    3   4   0
                61.45          2.40        1.5094    4   3   0
                62.12         14.12        1.4946    2   4   2
                62.12         20.64        1.4946    4   2   2
                63.22          9.90        1.4714    0   0   4
                63.27          1.52        1.4702    5   2   0
                63.66          1.90        1.4621    3   4   1
                64.12          1.88        1.4528    1   0   4
                64.83          2.56        1.4385    1   5   2
                64.98          1.83        1.4356    2   3   3
                65.90          1.50        1.4178    1   1   4
                66.78          2.15        1.4012    2   0   4
                69.21          3.96        1.3576    6   0   2
                70.22          2.98        1.3406    5   0   3
                71.16          7.60        1.3252    4   4   0
                72.01          1.18        1.3116    3   5   0
                72.77          1.14        1.2997    4   2   3
                73.64         12.77        1.2864    2   2   4
                74.48          1.30        1.2740    1   3   4
                74.54          1.67        1.2732    2   6   0
                74.54          1.56        1.2732    6   2   0
                75.15          4.82        1.2643    1   6   2
                75.29          1.92        1.2623    1   5   3
                75.29          3.06        1.2623    5   1   3
                76.98          1.36        1.2387    4   0   4
                80.24          1.70        1.1963    3   4   3
                82.56          2.65        1.1685    2   6   2
                82.56          6.28        1.1685    6   2   2
                84.34          1.98        1.1482    5   0   4
                86.61          1.98        1.1239    1   7   2
                86.77          1.80        1.1222    4   2   4
                87.50          1.57        1.1147    1   2   5
                89.19          1.68        1.0979    5   1   4
                89.19          1.68        1.0979    5   1   4
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.