data_1010565
_chemical_name_systematic          'Iron(III) niobium oxide'
_chemical_name_mineral             'Fergusonite titanian'
_chemical_formula_structural       'Fe Nb O4'
_chemical_formula_sum              'Fe Nb O4'
_publ_section_title                'The structure of Risorite'
_publ_author_name                  'Barth, T'
_journal_name_full                 'Norsk Geologisk Tidsskrift'
_journal_coden_ASTM                NOGTAO
_journal_volume                    9
_journal_year                      1926
_journal_page_first                37
_journal_page_last                 39
_cell_length_a                     7.78
_cell_length_b                     7.78
_cell_length_c                     11.41
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90
_cell_volume                       690.6
_cell_formula_units_Z              8
_exptl_crystal_density_meas        5.17
_symmetry_space_group_name_H-M     'P 4/m'
_symmetry_Int_Tables_number        83
_symmetry_cell_setting             tetragonal
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  '-x,-y,z'
  '-y,x,z'
  'y,-x,z'
  '-x,-y,-z'
  'x,y,-z'
  'y,-x,-z'
  '-y,x,-z'