Groutite
      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
      _database_code_amcsd 0013941

      CELL PARAMETERS:   10.6670   2.8710   4.5540   90.000   90.000   90.000
      SPACE GROUP: Pnma      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    139.466
      Density (g/cm3):      4.188
      MAX. ABS. INTENSITY / VOLUME**2:      36.75061357    
      RIR:      2.857
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                16.62          8.40        5.3335    2   0   0         2
                21.21        100.00        4.1883    1   0   1         4
                25.72         10.44        3.4633    2   0   1         4
                31.93         41.43        2.8026    3   0   1         4
                33.61         35.48        2.6667    4   0   0         2
                35.51         15.98        2.5280    2   1   0         4
                37.01          5.45        2.4287    0   1   1         4
                38.00         58.61        2.3681    1   1   1         8
                39.15         19.46        2.3012    4   0   1         4
                39.58          2.59        2.2770    0   0   2         2
                40.51          2.21        2.2268    1   0   2         4
                40.83          7.23        2.2103    2   1   1         8
                45.21          6.66        2.0055    3   1   1         8
                46.48          3.62        1.9539    4   1   0         4
                47.04          4.11        1.9319    5   0   1         4
                50.85          4.32        1.7956    4   1   1         8
                51.40          2.19        1.7778    6   0   0         2
                51.97         11.60        1.7596    1   1   2         8
                52.87          8.21        1.7316    4   0   2         4
                54.21         36.71        1.6919    2   1   2         8
                57.50         24.98        1.6028    5   1   1         8
                57.82          8.98        1.5946    3   1   2         8
                59.36          4.38        1.5568    5   0   2         4
                61.33         12.32        1.5115    6   1   0         4
                62.65          1.80        1.4828    4   1   2         8
                63.74          5.22        1.4600    2   0   3         4
                64.48          6.49        1.4451    7   0   1         4
                64.96          8.88        1.4355    0   2   0         2
                66.75          1.51        1.4013    6   0   2         4
                67.04          3.94        1.3961    3   0   3         4
                69.18          5.33        1.3580    1   2   1         8
                70.13          4.28        1.3420    0   1   3         4
                70.76          1.55        1.3315    1   1   3         8
                72.65          1.13        1.3014    2   1   3         8
                74.23          5.62        1.2777    3   2   1         8
                75.16          4.64        1.2640    4   2   0         4
                75.49          2.09        1.2593    6   1   2         8
                75.76          2.64        1.2555    3   1   3         8
                78.54          2.42        1.2180    4   2   1         8
                79.21          2.39        1.2093    8   1   0         4
                80.05          4.24        1.1987    4   1   3         8
                83.42          1.12        1.1587    7   1   2         8
                83.79          1.76        1.1544    6   0   3         4
                83.99          1.04        1.1522    5   2   1         8
                84.14          2.85        1.1506    8   0   2         4
                85.84          3.27        1.1321    1   0   4         4
                88.47          2.99        1.1051    4   2   2         8
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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.