O3 Tb2
      Zachariasen W
      Norsk Geologisk Tidsskrift 9 (1927) 310-316
      The crystal structure of the modification C of the sesquioxides of the
      rare earth metals, and of indium and Thallium.
      _cod_database_code 1010337
      _database_code_amcsd 0017263

      CELL PARAMETERS:   10.7000  10.7000  10.7000   90.000   90.000   90.000
      SPACE GROUP: I2_13     
      X-RAY WAVELENGTH:     1.541838
      Cell Volume:   1225.043
      Density (g/cm3):      7.933
      MAX. ABS. INTENSITY / VOLUME**2:      413.7355091    
      RIR:     16.981
      RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
               2-THETA      INTENSITY    D-SPACING   H   K   L   Multiplicity
                20.33          2.78        4.3683    2   1   1        12
                28.91        100.00        3.0888    2   2   2         4
                31.28          3.84        2.8597    3   2   1        12
                31.28          3.98        2.8597    3   1   2        12
                33.50         33.80        2.6750    4   0   0         6
                35.60          4.82        2.5220    4   1   1        12
                39.50          1.36        2.2812    3   3   2        12
                43.11          4.15        2.0984    4   3   1        12
                43.11          3.72        2.0984    4   1   3        12
                46.49          2.62        1.9535    5   2   1        12
                46.49          1.71        1.9535    5   1   2        12
                48.10         34.86        1.8915    4   4   0        12
                49.68          1.91        1.8350    4   3   3        12
                52.74          3.19        1.7358    6   1   1        12
                55.67          1.61        1.6510    5   4   1        12
                55.67          1.55        1.6510    5   1   4        12
                57.10         26.19        1.6131    6   2   2        12
                58.50          1.68        1.5776    6   3   1        12
                58.50          1.69        1.5776    6   1   3        12
                59.89          5.00        1.5444    4   4   4         4
                61.26          1.12        1.5132    5   4   3        12
                63.94          1.20        1.4561    6   3   3        12
                65.25          1.21        1.4298    6   4   2        12
                70.39          3.40        1.3375    8   0   0         6
                77.82          5.77        1.2274    6   6   2        12
                80.24          2.13        1.1963    8   4   0        12
                80.24          2.13        1.1963    8   0   4        12
                89.81          3.76        1.0921    8   4   4        12
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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.