The crystal structure described by SrBi4Ti4O15 crystallizes in the orthorhombic Cmc2_1 space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(6), and four equivalent O(4) atoms. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(5), one O(6), two equivalent O(2), and two equivalent O(4) atoms to form corner-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles range from 14-28°. In the second Ti site, Ti(2) is bonded in a 6-coordinate geometry to one O(1), one O(5), two equivalent O(7), and two equivalent O(8) atoms. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 6-coordinate geometry to one O(2), one O(7), two equivalent O(5), and two equivalent O(8) atoms. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(3) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Ti(2) and two equivalent Bi(2) atoms. In the second O site, O(7) is bonded in a distorted T-shaped geometry to two equivalent Ti(2) and one Bi(1) atom. In the third O site, O(2) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Ti(1), and one Bi(1) atom. In the fourth O site, O(3) is bonded to four equivalent Bi(2) atoms to form a mixture of edge and corner-sharing OBi4 tetrahedra. In the fifth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Sr(1) and two equivalent Ti(1) atoms. In the sixth O site, O(5) is bonded in a distorted see-saw-like geometry to one Ti(1), one Ti(2), and two equivalent Bi(1) atoms. In the seventh O site, O(6) is bonded in a 4-coordinate geometry to two equivalent Sr(1) and two equivalent Ti(1) atoms. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to two equivalent Ti(2) and two equivalent Bi(1) atoms. is represented by the CIF card [CIF]
data_SrTi4Bi4O15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   20.788
_cell_length_b   20.788
_cell_length_c   5.556
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   164.799
_symmetry_Int_Tables_number   1
_cell_volume   629.530
_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
  Sr  Sr0  1  0.758  0.758  0.761  1.0
  Sr  Sr1  1  0.242  0.242  0.261  1.0
  Ti  Ti2  1  0.204  0.300  0.769  1.0
  Ti  Ti3  1  0.300  0.204  0.769  1.0
  Ti  Ti4  1  0.796  0.700  0.269  1.0
  Ti  Ti5  1  0.700  0.796  0.269  1.0
  Ti  Ti6  1  0.099  0.403  0.770  1.0
  Ti  Ti7  1  0.403  0.099  0.770  1.0
  Ti  Ti8  1  0.901  0.597  0.270  1.0
  Ti  Ti9  1  0.597  0.901  0.270  1.0
  Bi  Bi10  1  0.859  0.654  0.718  1.0
  Bi  Bi11  1  0.654  0.859  0.718  1.0
  Bi  Bi12  1  0.141  0.346  0.218  1.0
  Bi  Bi13  1  0.346  0.141  0.218  1.0
  Bi  Bi14  1  0.940  0.501  0.733  1.0
  Bi  Bi15  1  0.501  0.940  0.733  1.0
  Bi  Bi16  1  0.060  0.499  0.233  1.0
  Bi  Bi17  1  0.499  0.060  0.233  1.0
  O  O18  1  0.117  0.506  0.785  1.0
  O  O19  1  0.506  0.117  0.785  1.0
  O  O20  1  0.883  0.494  0.285  1.0
  O  O21  1  0.494  0.883  0.285  1.0
  O  O22  1  0.515  0.408  0.091  1.0
  O  O23  1  0.408  0.515  0.091  1.0
  O  O24  1  0.485  0.592  0.591  1.0
  O  O25  1  0.592  0.485  0.591  1.0
  O  O26  1  0.757  0.254  1.000  1.0
  O  O27  1  0.254  0.757  1.000  1.0
  O  O28  1  0.243  0.746  0.500  1.0
  O  O29  1  0.746  0.243  0.500  1.0
  O  O30  1  0.074  0.989  0.525  1.0
  O  O31  1  0.989  0.074  0.525  1.0
  O  O32  1  0.926  0.011  0.025  1.0
  O  O33  1  0.011  0.926  0.025  1.0
  O  O34  1  0.093  0.284  0.817  1.0
  O  O35  1  0.284  0.093  0.817  1.0
  O  O36  1  0.907  0.716  0.317  1.0
  O  O37  1  0.716  0.907  0.317  1.0
  O  O38  1  0.300  0.300  0.804  1.0
  O  O39  1  0.700  0.700  0.304  1.0
  O  O40  1  0.119  0.822  0.569  1.0
  O  O41  1  0.822  0.119  0.569  1.0
  O  O42  1  0.881  0.178  0.069  1.0
  O  O43  1  0.178  0.881  0.069  1.0
  O  O44  1  0.651  0.375  0.027  1.0
  O  O45  1  0.375  0.651  0.027  1.0
  O  O46  1  0.349  0.625  0.527  1.0
  O  O47  1  0.625  0.349  0.527  1.0
[/CIF]
.
The crystal structure described by SrBi4Ti4O15 crystallizes in the orthorhombic Cmc2_1 space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(6), and four equivalent O(4) atoms. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(5), one O(6), two equivalent O(2), and two equivalent O(4) atoms to form corner-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles range from 14-28°. In the second Ti site, Ti(2) is bonded in a 6-coordinate geometry to one O(1), one O(5), two equivalent O(7), and two equivalent O(8) atoms. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a 6-coordinate geometry to one O(2), one O(7), two equivalent O(5), and two equivalent O(8) atoms. In the second Bi site, Bi(2) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(3) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Ti(2) and two equivalent Bi(2) atoms. In the second O site, O(7) is bonded in a distorted T-shaped geometry to two equivalent Ti(2) and one Bi(1) atom. In the third O site, O(2) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Ti(1), and one Bi(1) atom. In the fourth O site, O(3) is bonded to four equivalent Bi(2) atoms to form a mixture of edge and corner-sharing OBi4 tetrahedra. In the fifth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Sr(1) and two equivalent Ti(1) atoms. In the sixth O site, O(5) is bonded in a distorted see-saw-like geometry to one Ti(1), one Ti(2), and two equivalent Bi(1) atoms. In the seventh O site, O(6) is bonded in a 4-coordinate geometry to two equivalent Sr(1) and two equivalent Ti(1) atoms. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to two equivalent Ti(2) and two equivalent Bi(1) atoms. is represented by the CIF card [CIF]
data_SrTi4Bi4O15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   20.788
_cell_length_b   20.788
_cell_length_c   5.556
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   164.799
_symmetry_Int_Tables_number   1
_cell_volume   629.530
_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
  Sr  Sr0  1  0.758  0.758  0.761  1.0
  Sr  Sr1  1  0.242  0.242  0.261  1.0
  Ti  Ti2  1  0.204  0.300  0.769  1.0
  Ti  Ti3  1  0.300  0.204  0.769  1.0
  Ti  Ti4  1  0.796  0.700  0.269  1.0
  Ti  Ti5  1  0.700  0.796  0.269  1.0
  Ti  Ti6  1  0.099  0.403  0.770  1.0
  Ti  Ti7  1  0.403  0.099  0.770  1.0
  Ti  Ti8  1  0.901  0.597  0.270  1.0
  Ti  Ti9  1  0.597  0.901  0.270  1.0
  Bi  Bi10  1  0.859  0.654  0.718  1.0
  Bi  Bi11  1  0.654  0.859  0.718  1.0
  Bi  Bi12  1  0.141  0.346  0.218  1.0
  Bi  Bi13  1  0.346  0.141  0.218  1.0
  Bi  Bi14  1  0.940  0.501  0.733  1.0
  Bi  Bi15  1  0.501  0.940  0.733  1.0
  Bi  Bi16  1  0.060  0.499  0.233  1.0
  Bi  Bi17  1  0.499  0.060  0.233  1.0
  O  O18  1  0.117  0.506  0.785  1.0
  O  O19  1  0.506  0.117  0.785  1.0
  O  O20  1  0.883  0.494  0.285  1.0
  O  O21  1  0.494  0.883  0.285  1.0
  O  O22  1  0.515  0.408  0.091  1.0
  O  O23  1  0.408  0.515  0.091  1.0
  O  O24  1  0.485  0.592  0.591  1.0
  O  O25  1  0.592  0.485  0.591  1.0
  O  O26  1  0.757  0.254  1.000  1.0
  O  O27  1  0.254  0.757  1.000  1.0
  O  O28  1  0.243  0.746  0.500  1.0
  O  O29  1  0.746  0.243  0.500  1.0
  O  O30  1  0.074  0.989  0.525  1.0
  O  O31  1  0.989  0.074  0.525  1.0
  O  O32  1  0.926  0.011  0.025  1.0
  O  O33  1  0.011  0.926  0.025  1.0
  O  O34  1  0.093  0.284  0.817  1.0
  O  O35  1  0.284  0.093  0.817  1.0
  O  O36  1  0.907  0.716  0.317  1.0
  O  O37  1  0.716  0.907  0.317  1.0
  O  O38  1  0.300  0.300  0.804  1.0
  O  O39  1  0.700  0.700  0.304  1.0
  O  O40  1  0.119  0.822  0.569  1.0
  O  O41  1  0.822  0.119  0.569  1.0
  O  O42  1  0.881  0.178  0.069  1.0
  O  O43  1  0.178  0.881  0.069  1.0
  O  O44  1  0.651  0.375  0.027  1.0
  O  O45  1  0.375  0.651  0.027  1.0
  O  O46  1  0.349  0.625  0.527  1.0
  O  O47  1  0.625  0.349  0.527  1.0
[/CIF]
.