data_global
_chemical_name_mineral 'Foordite'
loop_
_publ_author_name
'Ercit T S'
'Cerny P'
_journal_name_full 'The Canadian Mineralogist'
_journal_volume 26 
_journal_year 1988
_journal_page_first 899
_journal_page_last 903
_publ_section_title
;
 The crystal structure of foordite
;
_database_code_amcsd 0005219
_chemical_formula_sum 'Sn Nb2 O6'
_cell_length_a 17.093
_cell_length_b 4.877
_cell_length_c 5.558
_cell_angle_alpha 90
_cell_angle_beta 90.85
_cell_angle_gamma 90
_cell_volume 463.278
_exptl_crystal_density_diffrn      5.742
_symmetry_space_group_name_H-M 'C 1 2/c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '-x,y,1/2-z'
  '1/2-x,1/2+y,1/2-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Sn   0.00000   0.24046   0.25000
Nb   0.33007   0.25807   0.32770
O1   0.42690   0.42010   0.40130
O2   0.35740   0.04190   0.06920
O3   0.21920   0.06320   0.35270
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Sn 0.01970 0.02350 0.02510 0.00000 0.00130 0.00000
Nb 0.01300 0.01440 0.01500 0.00010 -0.00080 -0.00010
O1 0.01380 0.01970 0.02500 -0.00220 -0.00200 0.00050
O2 0.01710 0.01970 0.02120 0.00130 0.00030 -0.00220
O3 0.01520 0.01600 0.01680 -0.00120 0.00010 -0.00190