The structure described by BaSn2Fe4O11 crystallizes in the orthorhombic Cmcm space group. Ba(1) is bonded to two equivalent O(1), two equivalent O(2), four equivalent O(3), and four equivalent O(4) atoms to form distorted BaO12 cuboctahedra that share corners with six equivalent Ba(1)O12 cuboctahedra, edges with two equivalent Fe(2)O6 octahedra, edges with four equivalent Fe(3)O6 octahedra, edges with three equivalent Fe(1)O5 trigonal bipyramids, and faces with six equivalent Sn(1)O6 octahedra. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(2), two equivalent O(3), and two equivalent O(5) atoms to form FeO5 trigonal bipyramids that share corners with two equivalent Fe(2)O6 octahedra, corners with four equivalent Fe(3)O6 octahedra, corners with six equivalent Sn(1)O6 octahedra, and edges with three equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 44-57°. In the second Fe site, Fe(2) is bonded to two equivalent O(5) and four equivalent O(4) atoms to form FeO6 octahedra that share corners with four equivalent Sn(1)O6 octahedra, corners with two equivalent Fe(1)O5 trigonal bipyramids, edges with two equivalent Ba(1)O12 cuboctahedra, and edges with four equivalent Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles are 56°. In the third Fe site, Fe(3) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form FeO6 octahedra that share corners with four equivalent Sn(1)O6 octahedra, corners with two equivalent Fe(1)O5 trigonal bipyramids, edges with two equivalent Ba(1)O12 cuboctahedra, edges with two equivalent Fe(2)O6 octahedra, and edges with two equivalent Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-56°. Sn(1) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted SnO6 octahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with four equivalent Fe(3)O6 octahedra, corners with three equivalent Fe(1)O5 trigonal bipyramids, faces with three equivalent Ba(1)O12 cuboctahedra, and  a faceface with one Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-56°. There are five inequivalent O sites. In the first O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Ba(1), one Fe(1), and two equivalent Sn(1) atoms. In the second O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Ba(1), one Fe(1), and two equivalent Sn(1) atoms. In the third O site, O(4) is bonded to one Ba(1), one Fe(2), one Fe(3), and one Sn(1) atom to form a mixture of distorted corner and edge-sharing OBaFe2Sn tetrahedra. In the fourth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Fe(1), one Fe(2), and two equivalent Fe(3) atoms. In the fifth O site, O(1) is bonded in a 4-coordinate geometry to one Ba(1), two equivalent Fe(3), and one Sn(1) atom. is represented by the CIF card [CIF]
data_BaFe4Sn2O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.074
_cell_length_b   6.074
_cell_length_c   13.683
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.973
_symmetry_Int_Tables_number   1
_cell_volume   437.258
_cell_formula_units_Z   2
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  0.663  0.337  0.750  1.0
  Ba  Ba1  1  0.337  0.663  0.250  1.0
  Fe  Fe2  1  0.670  0.330  0.250  1.0
  Fe  Fe3  1  0.330  0.670  0.750  1.0
  Fe  Fe4  1  0.500  0.500  0.000  1.0
  Fe  Fe5  1  0.500  0.500  0.500  1.0
  Fe  Fe6  1  0.500  0.000  0.000  1.0
  Fe  Fe7  1  0.000  0.500  0.000  1.0
  Fe  Fe8  1  0.500  0.000  0.500  1.0
  Fe  Fe9  1  0.000  0.500  0.500  1.0
  Sn  Sn10  1  0.998  0.002  0.861  1.0
  Sn  Sn11  1  0.002  0.998  0.139  1.0
  Sn  Sn12  1  0.998  0.002  0.639  1.0
  Sn  Sn13  1  0.002  0.998  0.361  1.0
  O  O14  1  0.821  0.179  0.921  1.0
  O  O15  1  0.179  0.821  0.079  1.0
  O  O16  1  0.821  0.179  0.579  1.0
  O  O17  1  0.179  0.821  0.421  1.0
  O  O18  1  0.146  0.854  0.750  1.0
  O  O19  1  0.854  0.146  0.250  1.0
  O  O20  1  0.697  0.856  0.750  1.0
  O  O21  1  0.856  0.697  0.250  1.0
  O  O22  1  0.303  0.144  0.250  1.0
  O  O23  1  0.144  0.303  0.750  1.0
  O  O24  1  0.823  0.648  0.920  1.0
  O  O25  1  0.648  0.823  0.080  1.0
  O  O26  1  0.823  0.648  0.580  1.0
  O  O27  1  0.648  0.823  0.420  1.0
  O  O28  1  0.177  0.352  0.080  1.0
  O  O29  1  0.352  0.177  0.920  1.0
  O  O30  1  0.177  0.352  0.420  1.0
  O  O31  1  0.352  0.177  0.580  1.0
  O  O32  1  0.667  0.333  0.415  1.0
  O  O33  1  0.333  0.667  0.585  1.0
  O  O34  1  0.667  0.333  0.085  1.0
  O  O35  1  0.333  0.667  0.915  1.0
[/CIF]
.
The structure described by BaSn2Fe4O11 crystallizes in the orthorhombic Cmcm space group. Ba(1) is bonded to two equivalent O(1), two equivalent O(2), four equivalent O(3), and four equivalent O(4) atoms to form distorted BaO12 cuboctahedra that share corners with six equivalent Ba(1)O12 cuboctahedra, edges with two equivalent Fe(2)O6 octahedra, edges with four equivalent Fe(3)O6 octahedra, edges with three equivalent Fe(1)O5 trigonal bipyramids, and faces with six equivalent Sn(1)O6 octahedra. There are three inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to one O(2), two equivalent O(3), and two equivalent O(5) atoms to form FeO5 trigonal bipyramids that share corners with two equivalent Fe(2)O6 octahedra, corners with four equivalent Fe(3)O6 octahedra, corners with six equivalent Sn(1)O6 octahedra, and edges with three equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 44-57°. In the second Fe site, Fe(2) is bonded to two equivalent O(5) and four equivalent O(4) atoms to form FeO6 octahedra that share corners with four equivalent Sn(1)O6 octahedra, corners with two equivalent Fe(1)O5 trigonal bipyramids, edges with two equivalent Ba(1)O12 cuboctahedra, and edges with four equivalent Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles are 56°. In the third Fe site, Fe(3) is bonded to two equivalent O(1), two equivalent O(4), and two equivalent O(5) atoms to form FeO6 octahedra that share corners with four equivalent Sn(1)O6 octahedra, corners with two equivalent Fe(1)O5 trigonal bipyramids, edges with two equivalent Ba(1)O12 cuboctahedra, edges with two equivalent Fe(2)O6 octahedra, and edges with two equivalent Fe(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-56°. Sn(1) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form distorted SnO6 octahedra that share corners with two equivalent Fe(2)O6 octahedra, corners with four equivalent Fe(3)O6 octahedra, corners with three equivalent Fe(1)O5 trigonal bipyramids, faces with three equivalent Ba(1)O12 cuboctahedra, and  a faceface with one Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 55-56°. There are five inequivalent O sites. In the first O site, O(2) is bonded in a 3-coordinate geometry to two equivalent Ba(1), one Fe(1), and two equivalent Sn(1) atoms. In the second O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Ba(1), one Fe(1), and two equivalent Sn(1) atoms. In the third O site, O(4) is bonded to one Ba(1), one Fe(2), one Fe(3), and one Sn(1) atom to form a mixture of distorted corner and edge-sharing OBaFe2Sn tetrahedra. In the fourth O site, O(5) is bonded in a distorted rectangular see-saw-like geometry to one Fe(1), one Fe(2), and two equivalent Fe(3) atoms. In the fifth O site, O(1) is bonded in a 4-coordinate geometry to one Ba(1), two equivalent Fe(3), and one Sn(1) atom. is represented by the CIF card [CIF]
data_BaFe4Sn2O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.074
_cell_length_b   6.074
_cell_length_c   13.683
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   119.973
_symmetry_Int_Tables_number   1
_cell_volume   437.258
_cell_formula_units_Z   2
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  0.663  0.337  0.750  1.0
  Ba  Ba1  1  0.337  0.663  0.250  1.0
  Fe  Fe2  1  0.670  0.330  0.250  1.0
  Fe  Fe3  1  0.330  0.670  0.750  1.0
  Fe  Fe4  1  0.500  0.500  0.000  1.0
  Fe  Fe5  1  0.500  0.500  0.500  1.0
  Fe  Fe6  1  0.500  0.000  0.000  1.0
  Fe  Fe7  1  0.000  0.500  0.000  1.0
  Fe  Fe8  1  0.500  0.000  0.500  1.0
  Fe  Fe9  1  0.000  0.500  0.500  1.0
  Sn  Sn10  1  0.998  0.002  0.861  1.0
  Sn  Sn11  1  0.002  0.998  0.139  1.0
  Sn  Sn12  1  0.998  0.002  0.639  1.0
  Sn  Sn13  1  0.002  0.998  0.361  1.0
  O  O14  1  0.821  0.179  0.921  1.0
  O  O15  1  0.179  0.821  0.079  1.0
  O  O16  1  0.821  0.179  0.579  1.0
  O  O17  1  0.179  0.821  0.421  1.0
  O  O18  1  0.146  0.854  0.750  1.0
  O  O19  1  0.854  0.146  0.250  1.0
  O  O20  1  0.697  0.856  0.750  1.0
  O  O21  1  0.856  0.697  0.250  1.0
  O  O22  1  0.303  0.144  0.250  1.0
  O  O23  1  0.144  0.303  0.750  1.0
  O  O24  1  0.823  0.648  0.920  1.0
  O  O25  1  0.648  0.823  0.080  1.0
  O  O26  1  0.823  0.648  0.580  1.0
  O  O27  1  0.648  0.823  0.420  1.0
  O  O28  1  0.177  0.352  0.080  1.0
  O  O29  1  0.352  0.177  0.920  1.0
  O  O30  1  0.177  0.352  0.420  1.0
  O  O31  1  0.352  0.177  0.580  1.0
  O  O32  1  0.667  0.333  0.415  1.0
  O  O33  1  0.333  0.667  0.585  1.0
  O  O34  1  0.667  0.333  0.085  1.0
  O  O35  1  0.333  0.667  0.915  1.0
[/CIF]
.