The crystal structure described by Ba2SnO4 is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4/mmm space group. Ba(1) is bonded in a 9-coordinate geometry to four equivalent O(2) and five equivalent O(1) atoms. Sn(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form corner-sharing SnO6 octahedra. The corner-sharing octahedra are not tilted. There are two inequivalent O sites. In the first O site, O(2) is bonded to four equivalent Ba(1) and two equivalent Sn(1) atoms to form distorted OBa4Sn2 octahedra that share corners with two equivalent O(2)Ba4Sn2 octahedra, corners with twelve equivalent O(1)Ba5Sn octahedra, edges with two equivalent O(2)Ba4Sn2 octahedra, faces with four equivalent O(2)Ba4Sn2 octahedra, and faces with four equivalent O(1)Ba5Sn octahedra. The corner-sharing octahedral tilt angles range from 0-57°. In the second O site, O(1) is bonded to five equivalent Ba(1) and one Sn(1) atom to form distorted OBa5Sn octahedra that share corners with five equivalent O(1)Ba5Sn octahedra, corners with twelve equivalent O(2)Ba4Sn2 octahedra, edges with eight equivalent O(1)Ba5Sn octahedra, and faces with four equivalent O(2)Ba4Sn2 octahedra. The corner-sharing octahedral tilt angles range from 0-57°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba2SnO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.172
_cell_length_b   4.172
_cell_length_c   7.319
_cell_angle_alpha   106.558
_cell_angle_beta   106.558
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   116.583
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Ba  Ba0  1  0.646  0.646  0.292  1.0
  Ba  Ba1  1  0.354  0.354  0.708  1.0
  Sn  Sn2  1  0.000  0.000  0.000  1.0
  O  O3  1  0.845  0.845  0.691  1.0
  O  O4  1  0.155  0.155  0.309  1.0
  O  O5  1  0.500  0.000  0.000  1.0
  O  O6  1  0.000  0.500  0.000  1.0
[/CIF]
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The crystal structure described by Ba2SnO4 is (La,Ba)CuO4 structured and crystallizes in the tetragonal I4/mmm space group. Ba(1) is bonded in a 9-coordinate geometry to four equivalent O(2) and five equivalent O(1) atoms. Sn(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form corner-sharing SnO6 octahedra. The corner-sharing octahedra are not tilted. There are two inequivalent O sites. In the first O site, O(2) is bonded to four equivalent Ba(1) and two equivalent Sn(1) atoms to form distorted OBa4Sn2 octahedra that share corners with two equivalent O(2)Ba4Sn2 octahedra, corners with twelve equivalent O(1)Ba5Sn octahedra, edges with two equivalent O(2)Ba4Sn2 octahedra, faces with four equivalent O(2)Ba4Sn2 octahedra, and faces with four equivalent O(1)Ba5Sn octahedra. The corner-sharing octahedral tilt angles range from 0-57°. In the second O site, O(1) is bonded to five equivalent Ba(1) and one Sn(1) atom to form distorted OBa5Sn octahedra that share corners with five equivalent O(1)Ba5Sn octahedra, corners with twelve equivalent O(2)Ba4Sn2 octahedra, edges with eight equivalent O(1)Ba5Sn octahedra, and faces with four equivalent O(2)Ba4Sn2 octahedra. The corner-sharing octahedral tilt angles range from 0-57°. is represented by the Crystallographic Information File (CIF) [CIF]
data_Ba2SnO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.172
_cell_length_b   4.172
_cell_length_c   7.319
_cell_angle_alpha   106.558
_cell_angle_beta   106.558
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   116.583
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Ba  Ba0  1  0.646  0.646  0.292  1.0
  Ba  Ba1  1  0.354  0.354  0.708  1.0
  Sn  Sn2  1  0.000  0.000  0.000  1.0
  O  O3  1  0.845  0.845  0.691  1.0
  O  O4  1  0.155  0.155  0.309  1.0
  O  O5  1  0.500  0.000  0.000  1.0
  O  O6  1  0.000  0.500  0.000  1.0
[/CIF]
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