Ankerite
      Reeder R J, Dollase W A
      American Mineralogist 74 (1989) 1159-1167
      Structural variation in the dolomite-ankerite solid-solution series: An X-ray,
      Mossbauer, and TEM study
      sample AMNH 8059
      _database_code_amcsd 0001274

      CELL PARAMETERS:    4.8312   4.8312  16.1663   90.000   90.000  120.000
      SPACE GROUP: R-3       
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    326.777
      Density (g/cm3):      3.161
      MAX. ABS. INTENSITY / VOLUME**2:      31.91593744    
      RIR:      3.288
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.45          3.05        5.3888    0   0   3         2
                21.94          1.65        4.0505    1   0   1         6
                23.95         16.30        3.7157    0   1   2         6
                30.76        100.00        2.9069    1   0   4         6
                37.22         16.11        2.4156    1   1   0         6
                40.94         11.12        2.2043    2  -1   3         6
                40.94          7.47        2.2043    1   1   3         6
                44.75         16.62        2.0252    2   0   2         6
                49.03          7.22        1.8578    0   2   4         6
                50.13         18.59        1.8197    0   1   8         6
                50.76          9.60        1.7986    1   1   6         6
                50.76         14.79        1.7986    2  -1   6         6
                58.66          2.49        1.5739    2   1   1         6
                59.57          7.04        1.5520   -1   3   2         6
                59.57          3.89        1.5520    1   2   2         6
                61.49          1.54        1.5080    1   0  10         6
                63.13          4.37        1.4727    3  -1   4         6
                63.13          3.48        1.4727    2   1   4         6
                64.07          3.45        1.4534    2   0   8         6
                64.67          1.86        1.4414    1   1   9         6
                67.11          8.01        1.3946    3   0   0         6
                69.81          3.50        1.3472    0   0  12         2
                74.12          2.99        1.2792    0   2  10         6
                76.49          2.86        1.2454    1   2   8         6
                76.49          1.15        1.2454   -1   3   8         6
                81.87          1.94        1.1766    1   1  12         6
                85.99          1.48        1.1305    3  -1  10         6
                85.99          1.28        1.1305    2   1  10         6
                87.45          1.33        1.1154    1   3   4         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.