Coalingite
Diffraction data computed using the structure from the paper listed below, 
along with the cell parameters refined from single crystal data of R110197
      Pastor-Rodriguez J, Taylor H F W
      Mineralogical Magazine 38 (1971) 286-294
      Crystal structure of coalingite
      Locality: New Idria serpentinite, Coalinga, California, USA
      Note: occupancies altered to match formula
      _database_code_amcsd 0014454

      CELL PARAMETERS:   3.1820  3.1820 37.0200   90.000   90.000  120.000
      SPACE GROUP: R-3m      

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Mg     0.33333   0.66667   0.10470     0.870     0.800
            Fe     0.33333   0.66667   0.10470     0.100     0.700
            Mn     0.33333   0.66667   0.10470     0.020     0.700
            Fe     0.33333   0.66667   0.10470     0.010     0.700
            OH     0.00000   0.00000   0.07600     1.000     6.100
            OH     0.66667   0.33333   0.13200     1.000     2.500
            C      0.33333   0.66667   0.33333     0.030     0.300
            Oc     0.10500   0.21000   0.00000     0.030     3.000
            Wa     0.10500   0.21000   0.00000     0.090     3.000
            OH     0.10500   0.21000   0.00000     0.040     3.000

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  2 +/-  2 +/- 33
            MAX. ABS. INTENSITY / VOLUME**2:      15.98392950    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                 7.16        100.00       12.3400    0   0   3
                14.36         55.43        6.1700    0   0   6
                21.60         43.02        4.1133    0   0   9
                32.58          1.01        2.7481    1   0   1
                32.86         13.50        2.7257    0   1   2
                34.74         11.95        2.5826    0   1   5
                38.00         47.39        2.3677    0   1   8
                42.39          9.87        2.1321    0   1  11
                47.66         15.83        1.9080    0   1  14
                51.58         11.24        1.7720    1   0  16
                53.64         10.11        1.7086    0   1  17
                57.97         13.55        1.5910    1   1   0
                58.49          3.80        1.5779    1   1   3
                60.05          5.63        1.5406    1   1   6
                62.60          7.09        1.4839    1   1   9
                64.93          3.08        1.4361    1   0  22
                67.38          1.50        1.3899    0   1  23
                68.10          1.10        1.3769    0   2   1
                71.43          4.58        1.3206    2   0   8
                72.46          4.91        1.3044    1   0  25
                78.23          1.41        1.2219    2   0  14
                81.26          1.59        1.1838    0   2  16
                82.92          2.13        1.1644    2   0  17
                88.23          1.29        1.1075    1   1  24
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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.