The structure described by Bi2Ti4O11 crystallizes in the monoclinic C2/c space group. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms to form a mixture of corner and edge-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles range from 13-18°. In the second Ti site, Ti(2) is bonded to one O(3), one O(4), one O(5), one O(6), and two equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles range from 5-26°. Bi(1) is bonded in a 5-coordinate geometry to two equivalent O(1) and three equivalent O(5) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Ti(1) and two equivalent Bi(1) atoms. In the second O site, O(2) is bonded in a T-shaped geometry to one Ti(1) and two equivalent Ti(2) atoms. In the third O site, O(3) is bonded in a T-shaped geometry to one Ti(2) and two equivalent Ti(1) atoms. In the fourth O site, O(4) is bonded in a linear geometry to one Ti(1) and one Ti(2) atom. In the fifth O site, O(5) is bonded to one Ti(2) and three equivalent Bi(1) atoms to form a mixture of corner and edge-sharing OTiBi3 tetrahedra. In the sixth O site, O(6) is bonded in a linear geometry to two equivalent Ti(2) atoms. is represented by the CIF file [CIF]
data_Ti4Bi2O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.586
_cell_length_b   7.586
_cell_length_c   14.983
_cell_angle_alpha   86.927
_cell_angle_beta   86.927
_cell_angle_gamma   29.007
_symmetry_Int_Tables_number   1
_cell_volume   417.434
_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
  Ti  Ti0  1  0.403  0.890  0.484  1.0
  Ti  Ti1  1  0.196  0.697  0.641  1.0
  Ti  Ti2  1  0.697  0.196  0.141  1.0
  Ti  Ti3  1  0.597  0.110  0.516  1.0
  Ti  Ti4  1  0.804  0.303  0.359  1.0
  Ti  Ti5  1  0.110  0.597  0.016  1.0
  Ti  Ti6  1  0.890  0.403  0.984  1.0
  Ti  Ti7  1  0.303  0.804  0.859  1.0
  Bi  Bi8  1  0.368  0.990  0.180  1.0
  Bi  Bi9  1  0.010  0.632  0.320  1.0
  Bi  Bi10  1  0.990  0.368  0.680  1.0
  Bi  Bi11  1  0.632  0.010  0.820  1.0
  O  O12  1  0.533  0.007  0.416  1.0
  O  O13  1  0.467  0.993  0.584  1.0
  O  O14  1  0.669  0.172  0.629  1.0
  O  O15  1  0.108  0.614  0.535  1.0
  O  O16  1  0.804  0.303  0.074  1.0
  O  O17  1  0.441  0.926  0.776  1.0
  O  O18  1  0.230  0.770  0.750  1.0
  O  O19  1  0.074  0.559  0.724  1.0
  O  O20  1  0.386  0.892  0.965  1.0
  O  O21  1  0.303  0.804  0.574  1.0
  O  O22  1  0.331  0.828  0.371  1.0
  O  O23  1  0.926  0.441  0.276  1.0
  O  O24  1  0.828  0.331  0.871  1.0
  O  O25  1  0.007  0.533  0.916  1.0
  O  O26  1  0.559  0.074  0.224  1.0
  O  O27  1  0.196  0.697  0.926  1.0
  O  O28  1  0.697  0.196  0.426  1.0
  O  O29  1  0.993  0.467  0.084  1.0
  O  O30  1  0.770  0.230  0.250  1.0
  O  O31  1  0.172  0.669  0.129  1.0
  O  O32  1  0.614  0.108  0.035  1.0
  O  O33  1  0.892  0.386  0.465  1.0
[/CIF]
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The structure described by Bi2Ti4O11 crystallizes in the monoclinic C2/c space group. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms to form a mixture of corner and edge-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles range from 13-18°. In the second Ti site, Ti(2) is bonded to one O(3), one O(4), one O(5), one O(6), and two equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles range from 5-26°. Bi(1) is bonded in a 5-coordinate geometry to two equivalent O(1) and three equivalent O(5) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Ti(1) and two equivalent Bi(1) atoms. In the second O site, O(2) is bonded in a T-shaped geometry to one Ti(1) and two equivalent Ti(2) atoms. In the third O site, O(3) is bonded in a T-shaped geometry to one Ti(2) and two equivalent Ti(1) atoms. In the fourth O site, O(4) is bonded in a linear geometry to one Ti(1) and one Ti(2) atom. In the fifth O site, O(5) is bonded to one Ti(2) and three equivalent Bi(1) atoms to form a mixture of corner and edge-sharing OTiBi3 tetrahedra. In the sixth O site, O(6) is bonded in a linear geometry to two equivalent Ti(2) atoms. is represented by the CIF file [CIF]
data_Ti4Bi2O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.586
_cell_length_b   7.586
_cell_length_c   14.983
_cell_angle_alpha   86.927
_cell_angle_beta   86.927
_cell_angle_gamma   29.007
_symmetry_Int_Tables_number   1
_cell_volume   417.434
_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
  Ti  Ti0  1  0.403  0.890  0.484  1.0
  Ti  Ti1  1  0.196  0.697  0.641  1.0
  Ti  Ti2  1  0.697  0.196  0.141  1.0
  Ti  Ti3  1  0.597  0.110  0.516  1.0
  Ti  Ti4  1  0.804  0.303  0.359  1.0
  Ti  Ti5  1  0.110  0.597  0.016  1.0
  Ti  Ti6  1  0.890  0.403  0.984  1.0
  Ti  Ti7  1  0.303  0.804  0.859  1.0
  Bi  Bi8  1  0.368  0.990  0.180  1.0
  Bi  Bi9  1  0.010  0.632  0.320  1.0
  Bi  Bi10  1  0.990  0.368  0.680  1.0
  Bi  Bi11  1  0.632  0.010  0.820  1.0
  O  O12  1  0.533  0.007  0.416  1.0
  O  O13  1  0.467  0.993  0.584  1.0
  O  O14  1  0.669  0.172  0.629  1.0
  O  O15  1  0.108  0.614  0.535  1.0
  O  O16  1  0.804  0.303  0.074  1.0
  O  O17  1  0.441  0.926  0.776  1.0
  O  O18  1  0.230  0.770  0.750  1.0
  O  O19  1  0.074  0.559  0.724  1.0
  O  O20  1  0.386  0.892  0.965  1.0
  O  O21  1  0.303  0.804  0.574  1.0
  O  O22  1  0.331  0.828  0.371  1.0
  O  O23  1  0.926  0.441  0.276  1.0
  O  O24  1  0.828  0.331  0.871  1.0
  O  O25  1  0.007  0.533  0.916  1.0
  O  O26  1  0.559  0.074  0.224  1.0
  O  O27  1  0.196  0.697  0.926  1.0
  O  O28  1  0.697  0.196  0.426  1.0
  O  O29  1  0.993  0.467  0.084  1.0
  O  O30  1  0.770  0.230  0.250  1.0
  O  O31  1  0.172  0.669  0.129  1.0
  O  O32  1  0.614  0.108  0.035  1.0
  O  O33  1  0.892  0.386  0.465  1.0
[/CIF]
.