data_1000387
_chemical_name_systematic
;
Thallium Thallium(III) niobium oxide (1/1/2/7)
;
_chemical_formula_structural       'Tl2 Nb2 O7'
_chemical_formula_sum              'Nb2 O7 Tl2'
_publ_section_title
;
Tl2 Nb2 O6+x (0<x<1): a continuous cubic pyrochlore type solid solution
;
loop_
_publ_author_name
  'Fourquet, J L'
  'Duroy, H'
  'Lacorre, P'
_journal_name_full                 'Journal of Solid State Chemistry'
_journal_coden_ASTM                JSSCBI
_journal_volume                    114
_journal_year                      1995
_journal_page_first                575
_journal_page_last                 584
_cell_length_a                     10.6220(2)
_cell_length_b                     10.6220(2)
_cell_length_c                     10.6220(2)
_cell_angle_alpha                  90
_cell_angle_beta                   90
_cell_angle_gamma                  90
_cell_volume                       1198.4
_cell_formula_units_Z              8
_symmetry_space_group_name_H-M     'F d -3 m Z'
_symmetry_Int_Tables_number        227
_symmetry_cell_setting             cubic
loop_
_symmetry_equiv_pos_as_xyz
  'x,y,z'
  'x,1/4-y,1/4-z'
  '1/4-x,y,1/4-z'
  '1/4-x,1/4-y,z'
  'y,z,x'
  '1/4-y,1/4-z,x'
  'y,1/4-z,1/4-x'
  '1/4-y,z,1/4-x'
  'z,x,y'
  '1/4-z,x,1/4-y'
  '1/4-z,1/4-x,y'
  'z,1/4-x,1/4-y'
  'x,z,y'
  'x,1/4-z,1/4-y'
  '1/4-x,1/4-z,y'
  '1/4-x,z,1/4-y'
  'y,x,z'
  '1/4-y,x,1/4-z'
  'y,1/4-x,1/4-z'
  '1/4-y,1/4-x,z'
  'z,y,x'
  '1/4-z,1/4-y,x'
  '1/4-z,y,1/4-x'
  'z,1/4-y,1/4-x'
  '-x,-y,-z'
  '-x,3/4+y,3/4+z'
  '3/4+x,-y,3/4+z'
  '3/4+x,3/4+y,-z'
  '-y,-z,-x'
  '3/4+y,3/4+z,-x'
  '-y,3/4+z,3/4+x'
  '3/4+y,-z,3/4+x'
  '-z,-x,-y'
  '3/4+z,-x,3/4+y'
  '3/4+z,3/4+x,-y'
  '-z,3/4+x,3/4+y'
  '-x,-z,-y'
  '-x,3/4+z,3/4+y'
  '3/4+x,3/4+z,-y'
  '3/4+x,-z,3/4+y'
  '-y,-x,-z'
  '3/4+y,-x,3/4+z'
  '-y,3/4+x,3/4+z'
  '3/4+y,3/4+x,-z'
  '-z,-y,-x'
  '3/4+z,3/4+y,-x'
  '3/4+z,-y,3/4+x'
  '-z,3/4+y,3/4+x'
  'x,1/2+y,1/2+z'
  '1/2+x,y,1/2+z'
  '1/2+x,1/2+y,z'
  'x,3/4-y,3/4-z'
  '1/2+x,1/4-y,3/4-z'
  '1/2+x,3/4-y,1/4-z'
  '1/4-x,1/2+y,3/4-z'
  '3/4-x,y,3/4-z'
  '3/4-x,1/2+y,1/4-z'
  '1/4-x,3/4-y,1/2+z'
  '3/4-x,1/4-y,1/2+z'
  '3/4-x,3/4-y,z'
  'y,1/2+z,1/2+x'
  '1/2+y,z,1/2+x'
  '1/2+y,1/2+z,x'
  '1/4-y,3/4-z,1/2+x'
  '3/4-y,1/4-z,1/2+x'
  '3/4-y,3/4-z,x'
  'y,3/4-z,3/4-x'
  '1/2+y,1/4-z,3/4-x'
  '1/2+y,3/4-z,1/4-x'
  '1/4-y,1/2+z,3/4-x'
  '3/4-y,z,3/4-x'
  '3/4-y,1/2+z,1/4-x'
  'z,1/2+x,1/2+y'
  '1/2+z,x,1/2+y'
  '1/2+z,1/2+x,y'
  '1/4-z,1/2+x,3/4-y'
  '3/4-z,x,3/4-y'
  '3/4-z,1/2+x,1/4-y'
  '1/4-z,3/4-x,1/2+y'
  '3/4-z,1/4-x,1/2+y'
  '3/4-z,3/4-x,y'
  'z,3/4-x,3/4-y'
  '1/2+z,1/4-x,3/4-y'
  '1/2+z,3/4-x,1/4-y'
  'x,1/2+z,1/2+y'
  '1/2+x,z,1/2+y'
  '1/2+x,1/2+z,y'
  'x,3/4-z,3/4-y'
  '1/2+x,1/4-z,3/4-y'
  '1/2+x,3/4-z,1/4-y'
  '1/4-x,3/4-z,1/2+y'
  '3/4-x,1/4-z,1/2+y'
  '3/4-x,3/4-z,y'
  '1/4-x,1/2+z,3/4-y'
  '3/4-x,z,3/4-y'
  '3/4-x,1/2+z,1/4-y'
  'y,1/2+x,1/2+z'
  '1/2+y,x,1/2+z'
  '1/2+y,1/2+x,z'
  '1/4-y,1/2+x,3/4-z'
  '3/4-y,x,3/4-z'
  '3/4-y,1/2+x,1/4-z'
  'y,3/4-x,3/4-z'
  '1/2+y,1/4-x,3/4-z'
  '1/2+y,3/4-x,1/4-z'
  '1/4-y,3/4-x,1/2+z'
  '3/4-y,1/4-x,1/2+z'
  '3/4-y,3/4-x,z'
  'z,1/2+y,1/2+x'
  '1/2+z,y,1/2+x'
  '1/2+z,1/2+y,x'
  '1/4-z,3/4-y,1/2+x'
  '3/4-z,1/4-y,1/2+x'
  '3/4-z,3/4-y,x'
  '1/4-z,1/2+y,3/4-x'
  '3/4-z,y,3/4-x'
  '3/4-z,1/2+y,1/4-x'
  'z,3/4-y,3/4-x'
  '1/2+z,1/4-y,3/4-x'
  '1/2+z,3/4-y,1/4-x'
  '-x,1/2-y,1/2-z'
  '1/2-x,-y,1/2-z'
  '1/2-x,1/2-y,-z'
  '-x,1/4+y,1/4+z'
  '1/2-x,3/4+y,1/4+z'
  '1/2-x,1/4+y,3/4+z'
  '3/4+x,1/2-y,1/4+z'
  '1/4+x,-y,1/4+z'
  '1/4+x,1/2-y,3/4+z'
  '3/4+x,1/4+y,1/2-z'
  '1/4+x,3/4+y,1/2-z'
  '1/4+x,1/4+y,-z'
  '-y,1/2-z,1/2-x'
  '1/2-y,-z,1/2-x'
  '1/2-y,1/2-z,-x'
  '3/4+y,1/4+z,1/2-x'
  '1/4+y,3/4+z,1/2-x'
  '1/4+y,1/4+z,-x'
  '-y,1/4+z,1/4+x'
  '1/2-y,3/4+z,1/4+x'
  '1/2-y,1/4+z,3/4+x'
  '3/4+y,1/2-z,1/4+x'
  '1/4+y,-z,1/4+x'
  '1/4+y,1/2-z,3/4+x'
  '-z,1/2-x,1/2-y'
  '1/2-z,-x,1/2-y'
  '1/2-z,1/2-x,-y'
  '3/4+z,1/2-x,1/4+y'
  '1/4+z,-x,1/4+y'
  '1/4+z,1/2-x,3/4+y'
  '3/4+z,1/4+x,1/2-y'
  '1/4+z,3/4+x,1/2-y'
  '1/4+z,1/4+x,-y'
  '-z,1/4+x,1/4+y'
  '1/2-z,3/4+x,1/4+y'
  '1/2-z,1/4+x,3/4+y'
  '-x,1/2-z,1/2-y'
  '1/2-x,-z,1/2-y'
  '1/2-x,1/2-z,-y'
  '-x,1/4+z,1/4+y'
  '1/2-x,3/4+z,1/4+y'
  '1/2-x,1/4+z,3/4+y'
  '3/4+x,1/4+z,1/2-y'
  '1/4+x,3/4+z,1/2-y'
  '1/4+x,1/4+z,-y'
  '3/4+x,1/2-z,1/4+y'
  '1/4+x,-z,1/4+y'
  '1/4+x,1/2-z,3/4+y'
  '-y,1/2-x,1/2-z'
  '1/2-y,-x,1/2-z'
  '1/2-y,1/2-x,-z'
  '3/4+y,1/2-x,1/4+z'
  '1/4+y,-x,1/4+z'
  '1/4+y,1/2-x,3/4+z'
  '-y,1/4+x,1/4+z'
  '1/2-y,3/4+x,1/4+z'
  '1/2-y,1/4+x,3/4+z'
  '3/4+y,1/4+x,1/2-z'
  '1/4+y,3/4+x,1/2-z'
  '1/4+y,1/4+x,-z'
  '-z,1/2-y,1/2-x'
  '1/2-z,-y,1/2-x'
  '1/2-z,1/2-y,-x'
  '3/4+z,1/4+y,1/2-x'
  '1/4+z,3/4+y,1/2-x'
  '1/4+z,1/4+y,-x'
  '3/4+z,1/2-y,1/4+x'
  '1/4+z,-y,1/4+x'
  '1/4+z,1/2-y,3/4+x'
  '-z,1/4+y,1/4+x'
  '1/2-z,3/4+y,1/4+x'
  '1/2-z,1/4+y,3/4+x'
loop_
_atom_type_symbol
_atom_type_oxidation_number
  Tl1+   1.000
  Tl3+   3.000
  Nb5+   5.000
  O2-   -2.000
loop_
_atom_site_label
_atom_site_type_symbol
_atom_site_symmetry_multiplicity
_atom_site_Wyckoff_symbol
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_attached_hydrogens
_atom_site_calc_flag
  Tl1   Tl1+  16 d 0.5 0.5 0.5 0.5  0 d
  Tl2   Tl3+  16 d 0.5 0.5 0.5 0.5  0 d
  Nb1   Nb5+  16 c 0. 0. 0. 1.  0 d
  O1    O2-   48 f 0.2925(5) 0.125 0.125 1.  0 d
  O2    O2-    8 b 0.375 0.375 0.375 1.  0 d
_refine_ls_R_factor_all            0.059