The material structure described by Ti9O10 crystallizes in the triclinic P-1 space group. There are five inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a 7-coordinate geometry to one O(1), one O(4), two equivalent O(3), and three equivalent O(2) atoms. In the second Ti site, Ti(2) is bonded in a 4-coordinate geometry to one O(1), one O(3), one O(4), and one O(5) atom. In the third Ti site, Ti(3) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. In the fourth Ti site, Ti(4) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(4), and two equivalent O(5) atoms. In the fifth Ti site, Ti(5) is bonded in a 6-coordinate geometry to one O(1), one O(2), two equivalent O(4), and two equivalent O(5) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Ti(1), one Ti(2), one Ti(3), one Ti(4), and one Ti(5) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Ti(3), one Ti(5), and three equivalent Ti(1) atoms. In the third O site, O(3) is bonded to one Ti(2), one Ti(3), and two equivalent Ti(1) atoms to form distorted OTi4 trigonal pyramids that share  a cornercorner with one O(5)Ti5 trigonal bipyramid, corners with three equivalent O(4)Ti5 trigonal bipyramids,  a cornercorner with one O(3)Ti4 trigonal pyramid, and  an edgeedge with one O(3)Ti4 trigonal pyramid. In the fourth O site, O(4) is bonded to one Ti(1), one Ti(2), one Ti(4), and two equivalent Ti(5) atoms to form distorted OTi5 trigonal bipyramids that share corners with two equivalent O(4)Ti5 trigonal bipyramids, corners with three equivalent O(5)Ti5 trigonal bipyramids, corners with three equivalent O(3)Ti4 trigonal pyramids, and edges with two equivalent O(5)Ti5 trigonal bipyramids. In the fifth O site, O(5) is bonded to one Ti(2), two equivalent Ti(4), and two equivalent Ti(5) atoms to form OTi5 trigonal bipyramids that share corners with three equivalent O(4)Ti5 trigonal bipyramids,  a cornercorner with one O(3)Ti4 trigonal pyramid, edges with two equivalent O(4)Ti5 trigonal bipyramids, and edges with two equivalent O(5)Ti5 trigonal bipyramids. is represented by the CIF file [CIF]
data_Ti9O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.504
_cell_length_b   5.526
_cell_length_c   8.951
_cell_angle_alpha   99.306
_cell_angle_beta   90.546
_cell_angle_gamma   111.380
_symmetry_Int_Tables_number   1
_cell_volume   204.158
_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  0.804  0.967  0.396  1.0
  Ti  Ti1  1  0.370  0.293  0.229  1.0
  Ti  Ti2  1  0.630  0.707  0.771  1.0
  Ti  Ti3  1  0.196  0.033  0.604  1.0
  Ti  Ti4  1  0.000  0.500  0.500  1.0
  Ti  Ti5  1  0.269  0.014  0.911  1.0
  Ti  Ti6  1  0.918  0.333  0.842  1.0
  Ti  Ti7  1  0.082  0.667  0.158  1.0
  Ti  Ti8  1  0.731  0.986  0.089  1.0
  O  O9  1  0.779  0.271  0.287  1.0
  O  O10  1  0.200  0.806  0.391  1.0
  O  O11  1  0.255  0.275  0.440  1.0
  O  O12  1  0.800  0.194  0.609  1.0
  O  O13  1  0.401  0.321  0.794  1.0
  O  O14  1  0.745  0.725  0.560  1.0
  O  O15  1  0.221  0.729  0.713  1.0
  O  O16  1  0.885  0.702  0.956  1.0
  O  O17  1  0.115  0.298  0.044  1.0
  O  O18  1  0.599  0.679  0.206  1.0
[/CIF]
.
The material structure described by Ti9O10 crystallizes in the triclinic P-1 space group. There are five inequivalent Ti sites. In the first Ti site, Ti(1) is bonded in a 7-coordinate geometry to one O(1), one O(4), two equivalent O(3), and three equivalent O(2) atoms. In the second Ti site, Ti(2) is bonded in a 4-coordinate geometry to one O(1), one O(3), one O(4), and one O(5) atom. In the third Ti site, Ti(3) is bonded in an octahedral geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. In the fourth Ti site, Ti(4) is bonded in a distorted rectangular see-saw-like geometry to one O(1), one O(4), and two equivalent O(5) atoms. In the fifth Ti site, Ti(5) is bonded in a 6-coordinate geometry to one O(1), one O(2), two equivalent O(4), and two equivalent O(5) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Ti(1), one Ti(2), one Ti(3), one Ti(4), and one Ti(5) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Ti(3), one Ti(5), and three equivalent Ti(1) atoms. In the third O site, O(3) is bonded to one Ti(2), one Ti(3), and two equivalent Ti(1) atoms to form distorted OTi4 trigonal pyramids that share  a cornercorner with one O(5)Ti5 trigonal bipyramid, corners with three equivalent O(4)Ti5 trigonal bipyramids,  a cornercorner with one O(3)Ti4 trigonal pyramid, and  an edgeedge with one O(3)Ti4 trigonal pyramid. In the fourth O site, O(4) is bonded to one Ti(1), one Ti(2), one Ti(4), and two equivalent Ti(5) atoms to form distorted OTi5 trigonal bipyramids that share corners with two equivalent O(4)Ti5 trigonal bipyramids, corners with three equivalent O(5)Ti5 trigonal bipyramids, corners with three equivalent O(3)Ti4 trigonal pyramids, and edges with two equivalent O(5)Ti5 trigonal bipyramids. In the fifth O site, O(5) is bonded to one Ti(2), two equivalent Ti(4), and two equivalent Ti(5) atoms to form OTi5 trigonal bipyramids that share corners with three equivalent O(4)Ti5 trigonal bipyramids,  a cornercorner with one O(3)Ti4 trigonal pyramid, edges with two equivalent O(4)Ti5 trigonal bipyramids, and edges with two equivalent O(5)Ti5 trigonal bipyramids. is represented by the CIF file [CIF]
data_Ti9O10
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.504
_cell_length_b   5.526
_cell_length_c   8.951
_cell_angle_alpha   99.306
_cell_angle_beta   90.546
_cell_angle_gamma   111.380
_symmetry_Int_Tables_number   1
_cell_volume   204.158
_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  0.804  0.967  0.396  1.0
  Ti  Ti1  1  0.370  0.293  0.229  1.0
  Ti  Ti2  1  0.630  0.707  0.771  1.0
  Ti  Ti3  1  0.196  0.033  0.604  1.0
  Ti  Ti4  1  0.000  0.500  0.500  1.0
  Ti  Ti5  1  0.269  0.014  0.911  1.0
  Ti  Ti6  1  0.918  0.333  0.842  1.0
  Ti  Ti7  1  0.082  0.667  0.158  1.0
  Ti  Ti8  1  0.731  0.986  0.089  1.0
  O  O9  1  0.779  0.271  0.287  1.0
  O  O10  1  0.200  0.806  0.391  1.0
  O  O11  1  0.255  0.275  0.440  1.0
  O  O12  1  0.800  0.194  0.609  1.0
  O  O13  1  0.401  0.321  0.794  1.0
  O  O14  1  0.745  0.725  0.560  1.0
  O  O15  1  0.221  0.729  0.713  1.0
  O  O16  1  0.885  0.702  0.956  1.0
  O  O17  1  0.115  0.298  0.044  1.0
  O  O18  1  0.599  0.679  0.206  1.0
[/CIF]
.