Dolomite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from the powder pattern for R050357
      Drits V A, McCarty D K, Sakharov B, Milliken K L
      The Canadian Mineralogist 43 (2005) 1255-1290
      New insight into structural and compositional
      variability in some ancient excess-Ca dolomite
      Locality: Lea County, New Mexico, USA
      Sample: M236-116, Phase I

      CELL PARAMETERS:   4.812501   4.812501   16.03949   90.00000   90.00000   120.0000
      SPACE GROUP: R-3
      X-RAY WAVELENGTH:     1.541838
               2-THETA      INTENSITY    D-SPACING   H   K   L
                22.07          1.67        4.0338    1   0   1
                24.10          5.46        3.6982    0   1   2
                30.97        100.00        2.8896    1   0   4
                33.55          4.79        2.6732    0   0   6
                35.33          4.96        2.5421    0   1   5
                37.39         10.86        2.4063    1   1   0
                41.16          7.76        2.1943    2  -1   3
                41.16         21.30        2.1943    1   1   3
                43.82          3.79        2.0665    0   2   1
                44.96         13.87        2.0169    2   0   2
                49.29          5.07        1.8491    0   2   4
                50.52         17.28        1.8067    0   1   8
                51.08          7.39        1.7884    1   1   6
                51.08         14.42        1.7884    2  -1   6
                51.27          1.25        1.7822    0   0   9
                58.91          2.28        1.5677    3  -1   1
                58.91          1.36        1.5677    2   1   1
                59.83          6.15        1.5457   -1   3   2
                59.83          2.32        1.5457    1   2   2
                63.44          3.92        1.4662    3  -1   4
                63.44          2.73        1.4662    2   1   4
                64.49          2.80        1.4448    2   0   8
                65.13          2.46        1.4321    2  -1   9
                65.13          1.16        1.4321    1   1   9
                66.07          2.18        1.4140   -1   3   5
                67.40          8.42        1.3892    3   0   0
                70.43          3.62        1.3366    0   0  12
                72.85          1.60        1.2981    2   1   7
                74.66          2.52        1.2710    0   2  10
                76.96          2.75        1.2387    1   2   8
                82.54          1.73        1.1685    1   1  12
                86.58          1.02        1.1239    3  -1  10
                87.87          1.44        1.1107    1   3   4
                87.87          1.44        1.1107    1   3   4
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.