Groutite
Diffraction data computed using the structure from the paper listed below, 
along with the cell parameters refined from single crystal data of R080004 
      Kohler T, Armbruster T, Libowitzky E
      Journal of Solid State Chemistry 133 (1997) 486-500
      Hydrogen bonding and Jahn-Teller distortion in groutite, alpha-MnOOH,
      and manganite, gamma-MnOOH, and their relations to the manganese
      dioxides ramsdellite and pyrolusite
      Locality: Nchwaning Mine, Kalahari manganese field, Republic of South Africa

      CELL PARAMETERS:  10.6970  2.8844  4.5660   90.000   90.000   90.000
      SPACE GROUP: Pnma      

           ATOM        X         Y         Z     OCCUPANCY  ISO(B)
            Mn     0.14014   0.25000  -0.05014     1.000     0.486
            O     -0.18652   0.25000   0.29890     1.000     0.584
            O     -0.07017   0.25000  -0.19470     1.000     0.584
            H     -0.09900   0.25000   0.64100     1.000     3.000

            X-RAY WAVELENGTH:     1.541838
            BOUNDS ON TWO THETA:    5.0  90.0
            LIMITS IMPOSED ON THE INDICES ARE:  +/-  9 +/-  2 +/-  4
            MAX. ABS. INTENSITY / VOLUME**2:      36.25863983    
            The INTENSITY cut off value is   1.00

               2-THETA      INTENSITY    D-SPACING   H   K   L
                16.57          8.40        5.3485    2   0   0
                21.16        100.00        4.1994    1   0   1
                25.65         10.44        3.4727    2   0   1
                31.84         41.47        2.8103    3   0   1
                33.51         35.54        2.6742    4   0   0
                35.36         16.05        2.5388    2   1   0
                36.86          5.48        2.4386    0   1   1
                37.84         58.96        2.3776    1   1   1
                39.03         19.53        2.3076    4   0   1
                39.47          2.59        2.2830    0   0   2
                40.40          2.22        2.2327    1   0   2
                40.66          7.29        2.2188    2   1   1
                45.04          6.69        2.0129    3   1   1
                46.30          3.65        1.9611    4   1   0
                46.90          4.13        1.9373    5   0   1
                50.66          4.35        1.8019    4   1   1
                51.24          2.20        1.7828    6   0   0
                51.78         11.67        1.7656    1   1   2
                52.72          8.24        1.7363    4   0   2
                54.02         36.95        1.6976    2   1   2
                57.29         25.15        1.6082    5   1   1
                57.62          9.04        1.5998    3   1   2
                59.19          4.40        1.5611    5   0   2
                61.11         12.41        1.5165    6   1   0
                62.43          1.81        1.4876    4   1   2
                63.56          5.24        1.4639    2   0   3
                64.28          6.51        1.4491    7   0   1
                64.63          9.00        1.4422    0   2   0
                66.55          1.52        1.4051    6   0   2
                66.83          3.96        1.3998    3   0   3
                68.83          5.39        1.3640    1   2   1
                69.88          4.30        1.3461    0   1   3
                70.51          1.56        1.3356    1   1   3
                72.39          1.14        1.3054    2   1   3
                73.86          5.68        1.2831    3   2   1
                74.79          4.69        1.2694    4   2   0
                75.22          2.10        1.2632    6   1   2
                75.49          2.66        1.2593    3   1   3
                78.15          2.45        1.2230    4   2   1
                78.91          2.40        1.2131    8   1   0
                79.76          4.26        1.2024    4   1   3
                83.10          1.12        1.1623    7   1   2
                83.52          1.76        1.1576    6   0   3
                83.58          1.04        1.1568    5   2   1
                83.85          2.86        1.1538    8   0   2
                85.56          3.28        1.1351    1   0   4
                88.04          3.00        1.1094    4   2   2
================================================================================
       XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
  For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.