H2Ti3O7
      Le Bail A, Fourquet J
      Materials Research Bulletin 27 (1992) 75-85
      Crystal structure and thermal behaviour of H2Ti3O7: a new
      defective ramsdellite form from Li/H exchange on Li2Ti3O7
      _cod_database_code 1000112
      _database_code_amcsd 0014363

      CELL PARAMETERS:    9.7689   2.9212   4.6745   90.000   90.000   90.000
      SPACE GROUP: Pnma      
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:    133.396
      Density (g/cm3):      3.664
      MAX. ABS. INTENSITY / VOLUME**2:      27.13821921    
      RIR:      2.412
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                21.07        100.00        4.2166    1   0   1         4
                33.54         37.40        2.6719    3   0   1         4
                35.82         17.68        2.5071    2   1   0         4
                36.80          4.48        2.4422    4   0   0         2
                37.45         30.38        2.4013    1   1   1         8
                38.52          1.22        2.3372    0   0   2         2
                40.84         28.51        2.2094    2   1   1         8
                41.73          9.57        2.1646    4   0   1         4
                46.04         15.37        1.9716    3   1   1         8
                47.91          1.09        1.8988    3   0   2         4
                50.64          2.53        1.8027    5   0   1         4
                53.61         37.64        1.7096    2   1   2         8
                54.33         20.35        1.6886    4   0   2         4
                60.13          1.80        1.5387    1   0   3         4
                60.34         13.01        1.5341    5   1   1         8
                63.72          8.49        1.4606    0   2   0         2
                65.65         13.79        1.4222    6   1   0         4
                66.53          2.92        1.4055    3   0   3         4
                67.92          4.93        1.3801    1   2   1         8
                68.98          8.50        1.3614    1   1   3         8
                70.41          2.77        1.3372    7   0   1         4
                71.26          1.68        1.3234    2   1   3         8
                73.96          4.74        1.2816    3   2   1         8
                74.99          1.68        1.2666    3   1   3         8
                75.90          1.12        1.2535    4   2   0         4
                78.52          1.51        1.2182    5   0   3         4
                78.70          1.21        1.2159    7   1   1         8
                79.10          1.23        1.2107    4   2   1         8
                82.55          2.41        1.1686    0   0   4         2
                86.57          1.80        1.1244    5   1   3         8
                88.51          6.69        1.1047    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.