Goethite
Diffraction data computed using the structure from the paper listed below,
along with the cell parameters refined from single crystal data of R120086
      Alvarez M, Sileo E E, Rueda E H
      American Mineralogist 93 (2008) 584-590
      Structure and reactivity of synthetic Co-substituted goethites
      Locality: synthetic
      Sample: G3, 3 mol% Co
      _database_code_amcsd 0004539

      CELL PARAMETERS:   4.6012  9.9610  3.0218   90.000   90.000   90.000
      SPACE GROUP: Pbnm      

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Fe     0.04730  -0.14590   0.25000     0.970     0.700
            Co     0.04730  -0.14590   0.25000     0.030     0.700
            O     -0.28620   0.19730   0.25000     1.000     1.000
            OH     0.18890   0.05310   0.25000     1.000     1.000

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  4 +/-  9 +/-  2
            MAX. ABS. INTENSITY / VOLUME**2:      42.79858101    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                17.81         11.81        4.9805    0   2   0
                21.27        100.00        4.1771    1   1   0
                26.37         10.90        3.3797    1   2   0
                33.28         40.69        2.6925    1   3   0
                34.72         23.19        2.5835    0   2   1
                35.54          4.39        2.5258    1   0   1
                36.07         14.44        2.4903    0   4   0
                36.71         62.65        2.4483    1   1   1
                39.16          3.22        2.3006    2   0   0
                40.02          8.28        2.2527    1   2   1
                40.23          2.86        2.2416    2   1   0
                41.22         14.50        2.1901    1   4   0
                45.10          3.41        2.0103    1   3   1
                47.30          5.77        1.9218    0   4   1
                50.71         10.43        1.8003    2   1   1
                51.54          2.28        1.7733    1   4   1
                53.32         32.88        1.7181    2   2   1
                54.29          9.35        1.6898    2   4   0
                55.34          3.32        1.6602    0   6   0
                57.49          6.20        1.6030    2   3   1
                59.06         22.78        1.5642    1   5   1
                61.36          9.71        1.5109    0   0   2
                61.58          4.49        1.5060    2   5   0
                63.03          3.44        1.4749    2   4   1
                63.46          4.00        1.4658    3   2   0
                63.99          9.74        1.4550    0   6   1
                65.72          5.93        1.4208    1   1   2
                67.24          4.25        1.3924    3   3   0
                67.96          1.05        1.3793    1   2   2
                68.62          4.50        1.3677    3   0   1
                69.09          5.13        1.3595    1   7   0
                69.36          2.22        1.3549    3   1   1
                69.87          1.89        1.3462    2   6   0
                71.54          1.68        1.3188    3   2   1
                71.62          6.73        1.3176    1   3   2
                73.28          2.83        1.2917    0   4   2
                75.12          1.97        1.2646    3   3   1
                75.24          1.07        1.2629    2   0   2
                76.61          2.31        1.2437    1   4   2
                80.05          3.06        1.1988    3   4   1
                84.08          2.33        1.1512    0   8   1
                84.85          2.69        1.1427    4   1   0
                86.27          1.07        1.1275    3   5   1
                86.36          1.08        1.1266    3   6   0
                86.38          3.56        1.1263    2   4   2
                87.25          1.37        1.1174    0   6   2
                89.50          1.23        1.0950    2   8   0
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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.