The material structure described by Ti9SnO20 is Hydrophilite-derived structured and crystallizes in the monoclinic C2/m space group. There are five inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form TiO6 octahedra that share  a cornercorner with one Sn(1)O6 octahedra, corners with three equivalent Ti(4)O6 octahedra, corners with four equivalent Ti(2)O6 octahedra,  an edgeedge with one Ti(3)O6 octahedra, and  an edgeedge with one Ti(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-52°. In the second Ti site, Ti(2) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(7) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra, corners with three equivalent Ti(5)O6 octahedra, corners with four equivalent Ti(1)O6 octahedra,  an edgeedge with one Ti(4)O6 octahedra, and  an edgeedge with one Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-53°. In the third Ti site, Ti(3) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form TiO6 octahedra that share corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Sn(1)O6 octahedra, corners with four equivalent Ti(4)O6 octahedra, and edges with two equivalent Ti(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-51°. In the fourth Ti site, Ti(4) is bonded to one O(5), one O(8), two equivalent O(1), and two equivalent O(6) atoms to form a mixture of edge and corner-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. In the fifth Ti site, Ti(5) is bonded to one O(3), one O(5), two equivalent O(7), and two equivalent O(8) atoms to form TiO6 octahedra that share corners with two equivalent Sn(1)O6 octahedra, corners with three equivalent Ti(2)O6 octahedra, corners with three equivalent Ti(4)O6 octahedra,  an edgeedge with one Ti(1)O6 octahedra, and  an edgeedge with one Ti(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-53°. Sn(1) is bonded to two equivalent O(4) and four equivalent O(7) atoms to form SnO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(3)O6 octahedra, corners with four equivalent Ti(5)O6 octahedra, and edges with two equivalent Ti(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-53°. There are eight inequivalent O sites. In the first O site, O(8) is bonded in a distorted trigonal planar geometry to one Ti(4) and two equivalent Ti(5) atoms. In the second O site, O(1) is bonded in a distorted trigonal planar geometry to one Ti(1), one Ti(2), and one Ti(4) atom. In the third O site, O(2) is bonded in a trigonal planar geometry to one Ti(1), one Ti(2), and one Ti(3) atom. In the fourth O site, O(3) is bonded in a distorted trigonal planar geometry to one Ti(1), one Ti(2), and one Ti(5) atom. In the fifth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ti(1), one Ti(3), and one Sn(1) atom. In the sixth O site, O(5) is bonded in a distorted trigonal planar geometry to one Ti(1), one Ti(4), and one Ti(5) atom. In the seventh O site, O(6) is bonded in a distorted trigonal planar geometry to one Ti(3) and two equivalent Ti(4) atoms. In the eighth O site, O(7) is bonded in a distorted trigonal planar geometry to one Ti(2), one Ti(5), and one Sn(1) atom. is represented by the CIF file [CIF]
data_Ti9SnO20
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.599
_cell_length_b   7.599
_cell_length_c   7.259
_cell_angle_alpha   85.967
_cell_angle_beta   85.967
_cell_angle_gamma   51.565
_symmetry_Int_Tables_number   1
_cell_volume   327.293
_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
  Ti  Ti0  1  0.298  0.298  0.698  1.0
  Ti  Ti1  1  0.296  0.296  0.204  1.0
  Ti  Ti2  1  0.702  0.702  0.302  1.0
  Ti  Ti3  1  0.500  0.500  0.500  1.0
  Ti  Ti4  1  0.704  0.704  0.796  1.0
  Ti  Ti5  1  0.099  0.099  0.402  1.0
  Ti  Ti6  1  0.901  0.901  0.598  1.0
  Ti  Ti7  1  0.100  0.100  0.902  1.0
  Ti  Ti8  1  0.900  0.900  0.098  1.0
  Sn  Sn9  1  0.500  0.500  0.000  1.0
  O  O10  1  0.607  0.996  0.699  1.0
  O  O11  1  0.996  0.607  0.699  1.0
  O  O12  1  0.393  0.004  0.301  1.0
  O  O13  1  0.639  0.639  0.556  1.0
  O  O14  1  0.760  0.760  0.047  1.0
  O  O15  1  0.563  0.563  0.250  1.0
  O  O16  1  0.162  0.162  0.641  1.0
  O  O17  1  0.361  0.361  0.444  1.0
  O  O18  1  0.004  0.393  0.301  1.0
  O  O19  1  0.806  0.194  0.500  1.0
  O  O20  1  0.405  0.807  0.894  1.0
  O  O21  1  0.807  0.405  0.894  1.0
  O  O22  1  0.194  0.806  0.500  1.0
  O  O23  1  0.595  0.193  0.106  1.0
  O  O24  1  0.240  0.240  0.953  1.0
  O  O25  1  0.838  0.838  0.359  1.0
  O  O26  1  0.437  0.437  0.750  1.0
  O  O27  1  0.039  0.039  0.155  1.0
  O  O28  1  0.961  0.961  0.845  1.0
  O  O29  1  0.193  0.595  0.106  1.0
[/CIF]
.
The material structure described by Ti9SnO20 is Hydrophilite-derived structured and crystallizes in the monoclinic C2/m space group. There are five inequivalent Ti sites. In the first Ti site, Ti(1) is bonded to one O(2), one O(3), one O(4), one O(5), and two equivalent O(1) atoms to form TiO6 octahedra that share  a cornercorner with one Sn(1)O6 octahedra, corners with three equivalent Ti(4)O6 octahedra, corners with four equivalent Ti(2)O6 octahedra,  an edgeedge with one Ti(3)O6 octahedra, and  an edgeedge with one Ti(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-52°. In the second Ti site, Ti(2) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(7) atoms to form TiO6 octahedra that share  a cornercorner with one Ti(3)O6 octahedra, corners with three equivalent Ti(5)O6 octahedra, corners with four equivalent Ti(1)O6 octahedra,  an edgeedge with one Ti(4)O6 octahedra, and  an edgeedge with one Sn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-53°. In the third Ti site, Ti(3) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form TiO6 octahedra that share corners with two equivalent Ti(2)O6 octahedra, corners with two equivalent Sn(1)O6 octahedra, corners with four equivalent Ti(4)O6 octahedra, and edges with two equivalent Ti(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-51°. In the fourth Ti site, Ti(4) is bonded to one O(5), one O(8), two equivalent O(1), and two equivalent O(6) atoms to form a mixture of edge and corner-sharing TiO6 octahedra. The corner-sharing octahedral tilt angles range from 48-50°. In the fifth Ti site, Ti(5) is bonded to one O(3), one O(5), two equivalent O(7), and two equivalent O(8) atoms to form TiO6 octahedra that share corners with two equivalent Sn(1)O6 octahedra, corners with three equivalent Ti(2)O6 octahedra, corners with three equivalent Ti(4)O6 octahedra,  an edgeedge with one Ti(1)O6 octahedra, and  an edgeedge with one Ti(5)O6 octahedra. The corner-sharing octahedral tilt angles range from 45-53°. Sn(1) is bonded to two equivalent O(4) and four equivalent O(7) atoms to form SnO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with two equivalent Ti(3)O6 octahedra, corners with four equivalent Ti(5)O6 octahedra, and edges with two equivalent Ti(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-53°. There are eight inequivalent O sites. In the first O site, O(8) is bonded in a distorted trigonal planar geometry to one Ti(4) and two equivalent Ti(5) atoms. In the second O site, O(1) is bonded in a distorted trigonal planar geometry to one Ti(1), one Ti(2), and one Ti(4) atom. In the third O site, O(2) is bonded in a trigonal planar geometry to one Ti(1), one Ti(2), and one Ti(3) atom. In the fourth O site, O(3) is bonded in a distorted trigonal planar geometry to one Ti(1), one Ti(2), and one Ti(5) atom. In the fifth O site, O(4) is bonded in a distorted trigonal planar geometry to one Ti(1), one Ti(3), and one Sn(1) atom. In the sixth O site, O(5) is bonded in a distorted trigonal planar geometry to one Ti(1), one Ti(4), and one Ti(5) atom. In the seventh O site, O(6) is bonded in a distorted trigonal planar geometry to one Ti(3) and two equivalent Ti(4) atoms. In the eighth O site, O(7) is bonded in a distorted trigonal planar geometry to one Ti(2), one Ti(5), and one Sn(1) atom. is represented by the CIF file [CIF]
data_Ti9SnO20
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.599
_cell_length_b   7.599
_cell_length_c   7.259
_cell_angle_alpha   85.967
_cell_angle_beta   85.967
_cell_angle_gamma   51.565
_symmetry_Int_Tables_number   1
_cell_volume   327.293
_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
  Ti  Ti0  1  0.298  0.298  0.698  1.0
  Ti  Ti1  1  0.296  0.296  0.204  1.0
  Ti  Ti2  1  0.702  0.702  0.302  1.0
  Ti  Ti3  1  0.500  0.500  0.500  1.0
  Ti  Ti4  1  0.704  0.704  0.796  1.0
  Ti  Ti5  1  0.099  0.099  0.402  1.0
  Ti  Ti6  1  0.901  0.901  0.598  1.0
  Ti  Ti7  1  0.100  0.100  0.902  1.0
  Ti  Ti8  1  0.900  0.900  0.098  1.0
  Sn  Sn9  1  0.500  0.500  0.000  1.0
  O  O10  1  0.607  0.996  0.699  1.0
  O  O11  1  0.996  0.607  0.699  1.0
  O  O12  1  0.393  0.004  0.301  1.0
  O  O13  1  0.639  0.639  0.556  1.0
  O  O14  1  0.760  0.760  0.047  1.0
  O  O15  1  0.563  0.563  0.250  1.0
  O  O16  1  0.162  0.162  0.641  1.0
  O  O17  1  0.361  0.361  0.444  1.0
  O  O18  1  0.004  0.393  0.301  1.0
  O  O19  1  0.806  0.194  0.500  1.0
  O  O20  1  0.405  0.807  0.894  1.0
  O  O21  1  0.807  0.405  0.894  1.0
  O  O22  1  0.194  0.806  0.500  1.0
  O  O23  1  0.595  0.193  0.106  1.0
  O  O24  1  0.240  0.240  0.953  1.0
  O  O25  1  0.838  0.838  0.359  1.0
  O  O26  1  0.437  0.437  0.750  1.0
  O  O27  1  0.039  0.039  0.155  1.0
  O  O28  1  0.961  0.961  0.845  1.0
  O  O29  1  0.193  0.595  0.106  1.0
[/CIF]
.