data_global
_chemical_name_mineral 'Thoreaulite'
loop_
_publ_author_name
'Mumme W G'
_journal_name_full 'American Mineralogist'
_journal_volume 55
_journal_year 1970
_journal_page_first 367
_journal_page_last 377
_publ_section_title
;
 The crystal structure of SnTa2O7, thoreaulite, an example of tin in five-fold
 coordination
;
_database_code_amcsd 199
_chemical_formula_sum 'Sn Ta2 O7'
_cell_length_a 17.14
_cell_length_b 4.865
_cell_length_c 5.548
_cell_angle_alpha 90.0
_cell_angle_beta 91.0
_cell_angle_gamma 90.0
_cell_volume 462.556
_exptl_crystal_density_diffrn  8.51
_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
_atom_site_U_iso_or_equiv
Sn   0.0  0.23  0.25  0.0152
Ta   0.1698  0.2403  0.6675  0.0114
O1   0.0  0.392  0.75  0.04559
O2   0.075  0.097  0.599  0.03293
O3   0.124  0.567  0.427  0.04559
O4   0.217  0.077  0.342  0.04433