The compound described by La5Ti4GaO17 crystallizes in the orthorhombic Pnnm space group. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 7-coordinate geometry to one O(4), three equivalent O(1), and three equivalent O(7) atoms. In the second La site, La(2) is bonded to two equivalent O(3), two equivalent O(9), four equivalent O(2), and four equivalent O(6) atoms to form distorted LaO12 cuboctahedra that share corners with two equivalent La(2)O12 cuboctahedra, corners with eight equivalent La(3)O12 cuboctahedra, faces with two equivalent La(2)O12 cuboctahedra, faces with four equivalent La(3)O12 cuboctahedra, faces with four equivalent Ti(2)O6 octahedra, and faces with four equivalent Ga(1)O6 octahedra. In the third La site, La(3) is bonded to one O(4), one O(9), two equivalent O(2), two equivalent O(3), two equivalent O(5), two equivalent O(6), and two equivalent O(8) atoms to form distorted LaO12 cuboctahedra that share corners with three equivalent La(3)O12 cuboctahedra, corners with four equivalent La(2)O12 cuboctahedra, faces with two equivalent La(2)O12 cuboctahedra, faces with two equivalent La(3)O12 cuboctahedra, faces with two equivalent Ti(1)O6 octahedra, faces with two equivalent Ga(1)O6 octahedra, and faces with four equivalent Ti(2)O6 octahedra. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(1), one O(5), one O(7), one O(8), and two equivalent O(4) atoms to form TiO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, and faces with two equivalent La(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 14-35°. In the second Ti site, Ti(2) is bonded to one O(2), one O(5), one O(6), one O(8), and two equivalent O(3) atoms to form TiO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Ga(1)O6 octahedra, faces with two equivalent La(2)O12 cuboctahedra, and faces with four equivalent La(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 14-35°. Ga(1) is bonded to two equivalent O(2), two equivalent O(6), and two equivalent O(9) atoms to form GaO6 octahedra that share corners with two equivalent Ga(1)O6 octahedra, corners with four equivalent Ti(2)O6 octahedra, faces with four equivalent La(2)O12 cuboctahedra, and faces with four equivalent La(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-20°. There are nine inequivalent O sites. In the first O site, O(4) is bonded in a 4-coordinate geometry to one La(1), one La(3), and two equivalent Ti(1) atoms. In the second O site, O(5) is bonded to two equivalent La(3), one Ti(1), and one Ti(2) atom to form distorted OLa2Ti2 tetrahedra that share corners with two equivalent O(9)La4Ga2 octahedra, corners with two equivalent O(3)La3Ti2 square pyramids,  a cornercorner with one O(7)La3Ti tetrahedra, corners with two equivalent O(5)La2Ti2 tetrahedra, and edges with two equivalent O(3)La3Ti2 square pyramids. The corner-sharing octahedral tilt angles are 66°. In the third O site, O(6) is bonded in a 4-coordinate geometry to two equivalent La(2), two equivalent La(3), one Ti(2), and one Ga(1) atom. In the fourth O site, O(7) is bonded to three equivalent La(1) and one Ti(1) atom to form OLa3Ti tetrahedra that share  a cornercorner with one O(5)La2Ti2 tetrahedra and corners with six equivalent O(7)La3Ti tetrahedra. In the fifth O site, O(8) is bonded in a 2-coordinate geometry to two equivalent La(3), one Ti(1), and one Ti(2) atom. In the sixth O site, O(1) is bonded in a 4-coordinate geometry to three equivalent La(1) and one Ti(1) atom. In the seventh O site, O(9) is bonded to two equivalent La(2), two equivalent La(3), and two equivalent Ga(1) atoms to form distorted OLa4Ga2 octahedra that share corners with four equivalent O(9)La4Ga2 octahedra, corners with four equivalent O(5)La2Ti2 tetrahedra, and edges with four equivalent O(3)La3Ti2 square pyramids. The corner-sharing octahedra are not tilted. In the eighth O site, O(2) is bonded in a 4-coordinate geometry to two equivalent La(2), two equivalent La(3), one Ti(2), and one Ga(1) atom. In the ninth O site, O(3) is bonded to one La(2), two equivalent La(3), and two equivalent Ti(2) atoms to form distorted OLa3Ti2 square pyramids that share corners with five equivalent O(3)La3Ti2 square pyramids, corners with two equivalent O(5)La2Ti2 tetrahedra, edges with two equivalent O(9)La4Ga2 octahedra, and edges with two equivalent O(5)La2Ti2 tetrahedra. is represented by the CIF file [CIF]
data_La5Ti4GaO17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.954
_cell_length_b   5.555
_cell_length_c   31.432
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   690.377
_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
  La  La0  1  0.000  0.570  0.287  1.0
  La  La1  1  0.000  0.430  0.713  1.0
  La  La2  1  0.500  0.070  0.213  1.0
  La  La3  1  0.500  0.930  0.787  1.0
  La  La4  1  0.000  0.500  0.500  1.0
  La  La5  1  0.500  0.000  0.000  1.0
  La  La6  1  0.000  0.995  0.411  1.0
  La  La7  1  0.000  0.005  0.589  1.0
  La  La8  1  0.500  0.495  0.089  1.0
  La  La9  1  0.500  0.505  0.911  1.0
  Ti  Ti10  1  0.500  0.034  0.323  1.0
  Ti  Ti11  1  0.500  0.966  0.677  1.0
  Ti  Ti12  1  0.000  0.534  0.177  1.0
  Ti  Ti13  1  0.000  0.466  0.823  1.0
  Ti  Ti14  1  0.500  0.505  0.408  1.0
  Ti  Ti15  1  0.500  0.495  0.592  1.0
  Ti  Ti16  1  0.000  0.005  0.092  1.0
  Ti  Ti17  1  0.000  0.995  0.908  1.0
  Ga  Ga18  1  0.500  0.000  0.500  1.0
  Ga  Ga19  1  0.000  0.500  0.000  1.0
  O  O20  1  0.500  0.297  0.287  1.0
  O  O21  1  0.500  0.703  0.713  1.0
  O  O22  1  0.000  0.797  0.213  1.0
  O  O23  1  0.000  0.203  0.787  1.0
  O  O24  1  0.500  0.710  0.536  1.0
  O  O25  1  0.500  0.290  0.464  1.0
  O  O26  1  0.000  0.210  0.964  1.0
  O  O27  1  0.000  0.790  0.036  1.0
  O  O28  1  0.000  0.495  0.416  1.0
  O  O29  1  0.000  0.505  0.584  1.0
  O  O30  1  0.500  0.995  0.084  1.0
  O  O31  1  0.500  0.005  0.916  1.0
  O  O32  1  0.000  0.004  0.329  1.0
  O  O33  1  0.000  0.996  0.671  1.0
  O  O34  1  0.500  0.504  0.171  1.0
  O  O35  1  0.500  0.496  0.829  1.0
  O  O36  1  0.500  0.196  0.379  1.0
  O  O37  1  0.500  0.804  0.621  1.0
  O  O38  1  0.000  0.696  0.121  1.0
  O  O39  1  0.000  0.304  0.879  1.0
  O  O40  1  0.500  0.782  0.449  1.0
  O  O41  1  0.500  0.218  0.551  1.0
  O  O42  1  0.000  0.282  0.051  1.0
  O  O43  1  0.000  0.718  0.949  1.0
  O  O44  1  0.500  0.813  0.276  1.0
  O  O45  1  0.500  0.187  0.724  1.0
  O  O46  1  0.000  0.313  0.224  1.0
  O  O47  1  0.000  0.687  0.776  1.0
  O  O48  1  0.500  0.716  0.363  1.0
  O  O49  1  0.500  0.284  0.637  1.0
  O  O50  1  0.000  0.215  0.137  1.0
  O  O51  1  0.000  0.784  0.863  1.0
  O  O52  1  0.000  0.000  0.500  1.0
  O  O53  1  0.500  0.500  0.000  1.0
[/CIF]
.
The compound described by La5Ti4GaO17 crystallizes in the orthorhombic Pnnm space group. There are three inequivalent La sites. In the first La site, La(1) is bonded in a 7-coordinate geometry to one O(4), three equivalent O(1), and three equivalent O(7) atoms. In the second La site, La(2) is bonded to two equivalent O(3), two equivalent O(9), four equivalent O(2), and four equivalent O(6) atoms to form distorted LaO12 cuboctahedra that share corners with two equivalent La(2)O12 cuboctahedra, corners with eight equivalent La(3)O12 cuboctahedra, faces with two equivalent La(2)O12 cuboctahedra, faces with four equivalent La(3)O12 cuboctahedra, faces with four equivalent Ti(2)O6 octahedra, and faces with four equivalent Ga(1)O6 octahedra. In the third La site, La(3) is bonded to one O(4), one O(9), two equivalent O(2), two equivalent O(3), two equivalent O(5), two equivalent O(6), and two equivalent O(8) atoms to form distorted LaO12 cuboctahedra that share corners with three equivalent La(3)O12 cuboctahedra, corners with four equivalent La(2)O12 cuboctahedra, faces with two equivalent La(2)O12 cuboctahedra, faces with two equivalent La(3)O12 cuboctahedra, faces with two equivalent Ti(1)O6 octahedra, faces with two equivalent Ga(1)O6 octahedra, and faces with four equivalent Ti(2)O6 octahedra. There are two inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(1), one O(5), one O(7), one O(8), and two equivalent O(4) atoms to form TiO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, and faces with two equivalent La(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 14-35°. In the second Ti site, Ti(2) is bonded to one O(2), one O(5), one O(6), one O(8), and two equivalent O(3) atoms to form TiO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Ga(1)O6 octahedra, faces with two equivalent La(2)O12 cuboctahedra, and faces with four equivalent La(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 14-35°. Ga(1) is bonded to two equivalent O(2), two equivalent O(6), and two equivalent O(9) atoms to form GaO6 octahedra that share corners with two equivalent Ga(1)O6 octahedra, corners with four equivalent Ti(2)O6 octahedra, faces with four equivalent La(2)O12 cuboctahedra, and faces with four equivalent La(3)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-20°. There are nine inequivalent O sites. In the first O site, O(4) is bonded in a 4-coordinate geometry to one La(1), one La(3), and two equivalent Ti(1) atoms. In the second O site, O(5) is bonded to two equivalent La(3), one Ti(1), and one Ti(2) atom to form distorted OLa2Ti2 tetrahedra that share corners with two equivalent O(9)La4Ga2 octahedra, corners with two equivalent O(3)La3Ti2 square pyramids,  a cornercorner with one O(7)La3Ti tetrahedra, corners with two equivalent O(5)La2Ti2 tetrahedra, and edges with two equivalent O(3)La3Ti2 square pyramids. The corner-sharing octahedral tilt angles are 66°. In the third O site, O(6) is bonded in a 4-coordinate geometry to two equivalent La(2), two equivalent La(3), one Ti(2), and one Ga(1) atom. In the fourth O site, O(7) is bonded to three equivalent La(1) and one Ti(1) atom to form OLa3Ti tetrahedra that share  a cornercorner with one O(5)La2Ti2 tetrahedra and corners with six equivalent O(7)La3Ti tetrahedra. In the fifth O site, O(8) is bonded in a 2-coordinate geometry to two equivalent La(3), one Ti(1), and one Ti(2) atom. In the sixth O site, O(1) is bonded in a 4-coordinate geometry to three equivalent La(1) and one Ti(1) atom. In the seventh O site, O(9) is bonded to two equivalent La(2), two equivalent La(3), and two equivalent Ga(1) atoms to form distorted OLa4Ga2 octahedra that share corners with four equivalent O(9)La4Ga2 octahedra, corners with four equivalent O(5)La2Ti2 tetrahedra, and edges with four equivalent O(3)La3Ti2 square pyramids. The corner-sharing octahedra are not tilted. In the eighth O site, O(2) is bonded in a 4-coordinate geometry to two equivalent La(2), two equivalent La(3), one Ti(2), and one Ga(1) atom. In the ninth O site, O(3) is bonded to one La(2), two equivalent La(3), and two equivalent Ti(2) atoms to form distorted OLa3Ti2 square pyramids that share corners with five equivalent O(3)La3Ti2 square pyramids, corners with two equivalent O(5)La2Ti2 tetrahedra, edges with two equivalent O(9)La4Ga2 octahedra, and edges with two equivalent O(5)La2Ti2 tetrahedra. is represented by the CIF file [CIF]
data_La5Ti4GaO17
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.954
_cell_length_b   5.555
_cell_length_c   31.432
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   690.377
_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
  La  La0  1  0.000  0.570  0.287  1.0
  La  La1  1  0.000  0.430  0.713  1.0
  La  La2  1  0.500  0.070  0.213  1.0
  La  La3  1  0.500  0.930  0.787  1.0
  La  La4  1  0.000  0.500  0.500  1.0
  La  La5  1  0.500  0.000  0.000  1.0
  La  La6  1  0.000  0.995  0.411  1.0
  La  La7  1  0.000  0.005  0.589  1.0
  La  La8  1  0.500  0.495  0.089  1.0
  La  La9  1  0.500  0.505  0.911  1.0
  Ti  Ti10  1  0.500  0.034  0.323  1.0
  Ti  Ti11  1  0.500  0.966  0.677  1.0
  Ti  Ti12  1  0.000  0.534  0.177  1.0
  Ti  Ti13  1  0.000  0.466  0.823  1.0
  Ti  Ti14  1  0.500  0.505  0.408  1.0
  Ti  Ti15  1  0.500  0.495  0.592  1.0
  Ti  Ti16  1  0.000  0.005  0.092  1.0
  Ti  Ti17  1  0.000  0.995  0.908  1.0
  Ga  Ga18  1  0.500  0.000  0.500  1.0
  Ga  Ga19  1  0.000  0.500  0.000  1.0
  O  O20  1  0.500  0.297  0.287  1.0
  O  O21  1  0.500  0.703  0.713  1.0
  O  O22  1  0.000  0.797  0.213  1.0
  O  O23  1  0.000  0.203  0.787  1.0
  O  O24  1  0.500  0.710  0.536  1.0
  O  O25  1  0.500  0.290  0.464  1.0
  O  O26  1  0.000  0.210  0.964  1.0
  O  O27  1  0.000  0.790  0.036  1.0
  O  O28  1  0.000  0.495  0.416  1.0
  O  O29  1  0.000  0.505  0.584  1.0
  O  O30  1  0.500  0.995  0.084  1.0
  O  O31  1  0.500  0.005  0.916  1.0
  O  O32  1  0.000  0.004  0.329  1.0
  O  O33  1  0.000  0.996  0.671  1.0
  O  O34  1  0.500  0.504  0.171  1.0
  O  O35  1  0.500  0.496  0.829  1.0
  O  O36  1  0.500  0.196  0.379  1.0
  O  O37  1  0.500  0.804  0.621  1.0
  O  O38  1  0.000  0.696  0.121  1.0
  O  O39  1  0.000  0.304  0.879  1.0
  O  O40  1  0.500  0.782  0.449  1.0
  O  O41  1  0.500  0.218  0.551  1.0
  O  O42  1  0.000  0.282  0.051  1.0
  O  O43  1  0.000  0.718  0.949  1.0
  O  O44  1  0.500  0.813  0.276  1.0
  O  O45  1  0.500  0.187  0.724  1.0
  O  O46  1  0.000  0.313  0.224  1.0
  O  O47  1  0.000  0.687  0.776  1.0
  O  O48  1  0.500  0.716  0.363  1.0
  O  O49  1  0.500  0.284  0.637  1.0
  O  O50  1  0.000  0.215  0.137  1.0
  O  O51  1  0.000  0.784  0.863  1.0
  O  O52  1  0.000  0.000  0.500  1.0
  O  O53  1  0.500  0.500  0.000  1.0
[/CIF]
.