The structure described by Y2TiSnO7 crystallizes in the orthorhombic Imma space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(4), and four equivalent O(2) atoms. In the second Y site, Y(2) is bonded to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms to form distorted YO8 hexagonal bipyramids that share edges with two equivalent Y(2)O8 hexagonal bipyramids, edges with two equivalent Sn(1)O6 octahedra, and edges with four equivalent Ti(1)O6 octahedra. Ti(1) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form TiO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with four equivalent Sn(1)O6 octahedra, and edges with four equivalent Y(2)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 43-51°. Sn(1) is bonded to two equivalent O(4) and four equivalent O(2) atoms to form SnO6 octahedra that share corners with two equivalent Sn(1)O6 octahedra, corners with four equivalent Ti(1)O6 octahedra, and edges with two equivalent Y(2)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 51-57°. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Y(1) and two equivalent Y(2) atoms to form OY4 tetrahedra that share corners with two equivalent O(4)Y2Sn2 tetrahedra, corners with four equivalent O(1)Y4 tetrahedra, corners with eight equivalent O(2)Y2TiSn tetrahedra,  an edgeedge with one O(4)Y2Sn2 tetrahedra, and edges with four equivalent O(2)Y2TiSn tetrahedra. In the second O site, O(2) is bonded to one Y(1), one Y(2), one Ti(1), and one Sn(1) atom to form distorted OY2TiSn tetrahedra that share corners with two equivalent O(4)Y2Sn2 tetrahedra, corners with two equivalent O(1)Y4 tetrahedra, corners with eight equivalent O(2)Y2TiSn tetrahedra,  an edgeedge with one O(4)Y2Sn2 tetrahedra,  an edgeedge with one O(1)Y4 tetrahedra, and edges with two equivalent O(2)Y2TiSn tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Y(2) and two equivalent Ti(1) atoms. In the fourth O site, O(4) is bonded to two equivalent Y(1) and two equivalent Sn(1) atoms to form OY2Sn2 tetrahedra that share corners with two equivalent O(1)Y4 tetrahedra, corners with four equivalent O(4)Y2Sn2 tetrahedra, corners with eight equivalent O(2)Y2TiSn tetrahedra,  an edgeedge with one O(1)Y4 tetrahedra, and edges with four equivalent O(2)Y2TiSn tetrahedra. is represented by the CIF card [CIF]
data_Y2TiSnO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.322
_cell_length_b   7.322
_cell_length_c   7.322
_cell_angle_alpha   120.143
_cell_angle_beta   119.940
_cell_angle_gamma   89.929
_symmetry_Int_Tables_number   1
_cell_volume   277.402
_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
  Y  Y0  1  0.000  0.500  0.500  1.0
  Y  Y1  1  0.500  0.500  0.000  1.0
  Y  Y2  1  0.500  0.000  0.000  1.0
  Y  Y3  1  0.500  0.500  0.500  1.0
  Ti  Ti4  1  0.500  0.000  0.500  1.0
  Ti  Ti5  1  0.000  0.000  0.000  1.0
  Sn  Sn6  1  0.000  0.500  0.000  1.0
  Sn  Sn7  1  0.000  0.000  0.500  1.0
  O  O8  1  0.623  0.373  0.250  1.0
  O  O9  1  0.377  0.627  0.750  1.0
  O  O10  1  0.341  0.079  0.669  1.0
  O  O11  1  0.341  0.672  0.261  1.0
  O  O12  1  0.319  0.069  0.250  1.0
  O  O13  1  0.910  0.672  0.831  1.0
  O  O14  1  0.910  0.079  0.239  1.0
  O  O15  1  0.905  0.655  0.250  1.0
  O  O16  1  0.659  0.921  0.331  1.0
  O  O17  1  0.659  0.328  0.739  1.0
  O  O18  1  0.681  0.931  0.750  1.0
  O  O19  1  0.090  0.328  0.169  1.0
  O  O20  1  0.090  0.921  0.761  1.0
  O  O21  1  0.095  0.345  0.750  1.0
[/CIF]
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The structure described by Y2TiSnO7 crystallizes in the orthorhombic Imma space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(4), and four equivalent O(2) atoms. In the second Y site, Y(2) is bonded to two equivalent O(1), two equivalent O(3), and four equivalent O(2) atoms to form distorted YO8 hexagonal bipyramids that share edges with two equivalent Y(2)O8 hexagonal bipyramids, edges with two equivalent Sn(1)O6 octahedra, and edges with four equivalent Ti(1)O6 octahedra. Ti(1) is bonded to two equivalent O(3) and four equivalent O(2) atoms to form TiO6 octahedra that share corners with two equivalent Ti(1)O6 octahedra, corners with four equivalent Sn(1)O6 octahedra, and edges with four equivalent Y(2)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 43-51°. Sn(1) is bonded to two equivalent O(4) and four equivalent O(2) atoms to form SnO6 octahedra that share corners with two equivalent Sn(1)O6 octahedra, corners with four equivalent Ti(1)O6 octahedra, and edges with two equivalent Y(2)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles range from 51-57°. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Y(1) and two equivalent Y(2) atoms to form OY4 tetrahedra that share corners with two equivalent O(4)Y2Sn2 tetrahedra, corners with four equivalent O(1)Y4 tetrahedra, corners with eight equivalent O(2)Y2TiSn tetrahedra,  an edgeedge with one O(4)Y2Sn2 tetrahedra, and edges with four equivalent O(2)Y2TiSn tetrahedra. In the second O site, O(2) is bonded to one Y(1), one Y(2), one Ti(1), and one Sn(1) atom to form distorted OY2TiSn tetrahedra that share corners with two equivalent O(4)Y2Sn2 tetrahedra, corners with two equivalent O(1)Y4 tetrahedra, corners with eight equivalent O(2)Y2TiSn tetrahedra,  an edgeedge with one O(4)Y2Sn2 tetrahedra,  an edgeedge with one O(1)Y4 tetrahedra, and edges with two equivalent O(2)Y2TiSn tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Y(2) and two equivalent Ti(1) atoms. In the fourth O site, O(4) is bonded to two equivalent Y(1) and two equivalent Sn(1) atoms to form OY2Sn2 tetrahedra that share corners with two equivalent O(1)Y4 tetrahedra, corners with four equivalent O(4)Y2Sn2 tetrahedra, corners with eight equivalent O(2)Y2TiSn tetrahedra,  an edgeedge with one O(1)Y4 tetrahedra, and edges with four equivalent O(2)Y2TiSn tetrahedra. is represented by the CIF card [CIF]
data_Y2TiSnO7
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.322
_cell_length_b   7.322
_cell_length_c   7.322
_cell_angle_alpha   120.143
_cell_angle_beta   119.940
_cell_angle_gamma   89.929
_symmetry_Int_Tables_number   1
_cell_volume   277.402
_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
  Y  Y0  1  0.000  0.500  0.500  1.0
  Y  Y1  1  0.500  0.500  0.000  1.0
  Y  Y2  1  0.500  0.000  0.000  1.0
  Y  Y3  1  0.500  0.500  0.500  1.0
  Ti  Ti4  1  0.500  0.000  0.500  1.0
  Ti  Ti5  1  0.000  0.000  0.000  1.0
  Sn  Sn6  1  0.000  0.500  0.000  1.0
  Sn  Sn7  1  0.000  0.000  0.500  1.0
  O  O8  1  0.623  0.373  0.250  1.0
  O  O9  1  0.377  0.627  0.750  1.0
  O  O10  1  0.341  0.079  0.669  1.0
  O  O11  1  0.341  0.672  0.261  1.0
  O  O12  1  0.319  0.069  0.250  1.0
  O  O13  1  0.910  0.672  0.831  1.0
  O  O14  1  0.910  0.079  0.239  1.0
  O  O15  1  0.905  0.655  0.250  1.0
  O  O16  1  0.659  0.921  0.331  1.0
  O  O17  1  0.659  0.328  0.739  1.0
  O  O18  1  0.681  0.931  0.750  1.0
  O  O19  1  0.090  0.328  0.169  1.0
  O  O20  1  0.090  0.921  0.761  1.0
  O  O21  1  0.095  0.345  0.750  1.0
[/CIF]
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