The structure described by YNbTe2O8 crystallizes in the orthorhombic Cmce space group. Y(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. Nb(1) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 0-29°. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted T-shaped geometry to one O(2) and two equivalent O(1) atoms. In the second Te site, Te(2) is bonded in a distorted T-shaped geometry to one O(3) and two equivalent O(4) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Y(1) and one Te(1) atom. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to two equivalent Y(1) and one Te(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Y(1) and one Te(2) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Nb(1) and one Te(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to two equivalent Nb(1) atoms. In the sixth O site, O(6) is bonded in a linear geometry to two equivalent Nb(1) atoms. is represented by the CIF file [CIF]
data_YNb(TeO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.608
_cell_length_b   5.608
_cell_length_c   22.260
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   93.071
_symmetry_Int_Tables_number   1
_cell_volume   699.198
_cell_formula_units_Z   4
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  0.253  0.253  0.000  1.0
  Y  Y1  1  0.747  0.747  0.000  1.0
  Y  Y2  1  0.247  0.247  0.500  1.0
  Y  Y3  1  0.753  0.753  0.500  1.0
  Nb  Nb4  1  0.247  0.253  0.750  1.0
  Nb  Nb5  1  0.747  0.753  0.750  1.0
  Nb  Nb6  1  0.753  0.747  0.250  1.0
  Nb  Nb7  1  0.253  0.247  0.250  1.0
  Te  Te8  1  0.809  0.191  0.894  1.0
  Te  Te9  1  0.191  0.809  0.106  1.0
  Te  Te10  1  0.323  0.677  0.870  1.0
  Te  Te11  1  0.677  0.323  0.130  1.0
  Te  Te12  1  0.823  0.177  0.630  1.0
  Te  Te13  1  0.177  0.823  0.370  1.0
  Te  Te14  1  0.309  0.691  0.606  1.0
  Te  Te15  1  0.691  0.309  0.394  1.0
  O  O16  1  0.552  0.067  0.943  1.0
  O  O17  1  0.933  0.448  0.943  1.0
  O  O18  1  0.448  0.933  0.057  1.0
  O  O19  1  0.067  0.552  0.057  1.0
  O  O20  1  0.015  0.985  0.936  1.0
  O  O21  1  0.985  0.015  0.064  1.0
  O  O22  1  0.430  0.570  0.945  1.0
  O  O23  1  0.570  0.430  0.055  1.0
  O  O24  1  0.274  0.355  0.839  1.0
  O  O25  1  0.645  0.726  0.839  1.0
  O  O26  1  0.726  0.645  0.161  1.0
  O  O27  1  0.355  0.274  0.161  1.0
  O  O28  1  0.930  0.070  0.555  1.0
  O  O29  1  0.070  0.930  0.445  1.0
  O  O30  1  0.145  0.226  0.661  1.0
  O  O31  1  0.774  0.855  0.661  1.0
  O  O32  1  0.855  0.774  0.339  1.0
  O  O33  1  0.226  0.145  0.339  1.0
  O  O34  1  0.052  0.567  0.557  1.0
  O  O35  1  0.433  0.948  0.557  1.0
  O  O36  1  0.948  0.433  0.443  1.0
  O  O37  1  0.567  0.052  0.443  1.0
  O  O38  1  0.515  0.485  0.564  1.0
  O  O39  1  0.485  0.515  0.436  1.0
  O  O40  1  0.974  0.026  0.771  1.0
  O  O41  1  0.026  0.974  0.229  1.0
  O  O42  1  0.971  0.529  0.750  1.0
  O  O43  1  0.471  0.029  0.750  1.0
  O  O44  1  0.029  0.471  0.250  1.0
  O  O45  1  0.529  0.971  0.250  1.0
  O  O46  1  0.474  0.526  0.729  1.0
  O  O47  1  0.526  0.474  0.271  1.0
[/CIF]
.
The structure described by YNbTe2O8 crystallizes in the orthorhombic Cmce space group. Y(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(3), and four equivalent O(1) atoms. Nb(1) is bonded to two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 0-29°. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded in a distorted T-shaped geometry to one O(2) and two equivalent O(1) atoms. In the second Te site, Te(2) is bonded in a distorted T-shaped geometry to one O(3) and two equivalent O(4) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Y(1) and one Te(1) atom. In the second O site, O(2) is bonded in a trigonal non-coplanar geometry to two equivalent Y(1) and one Te(1) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to two equivalent Y(1) and one Te(2) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Nb(1) and one Te(2) atom. In the fifth O site, O(5) is bonded in a bent 150 degrees geometry to two equivalent Nb(1) atoms. In the sixth O site, O(6) is bonded in a linear geometry to two equivalent Nb(1) atoms. is represented by the CIF file [CIF]
data_YNb(TeO4)2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.608
_cell_length_b   5.608
_cell_length_c   22.260
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   93.071
_symmetry_Int_Tables_number   1
_cell_volume   699.198
_cell_formula_units_Z   4
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  0.253  0.253  0.000  1.0
  Y  Y1  1  0.747  0.747  0.000  1.0
  Y  Y2  1  0.247  0.247  0.500  1.0
  Y  Y3  1  0.753  0.753  0.500  1.0
  Nb  Nb4  1  0.247  0.253  0.750  1.0
  Nb  Nb5  1  0.747  0.753  0.750  1.0
  Nb  Nb6  1  0.753  0.747  0.250  1.0
  Nb  Nb7  1  0.253  0.247  0.250  1.0
  Te  Te8  1  0.809  0.191  0.894  1.0
  Te  Te9  1  0.191  0.809  0.106  1.0
  Te  Te10  1  0.323  0.677  0.870  1.0
  Te  Te11  1  0.677  0.323  0.130  1.0
  Te  Te12  1  0.823  0.177  0.630  1.0
  Te  Te13  1  0.177  0.823  0.370  1.0
  Te  Te14  1  0.309  0.691  0.606  1.0
  Te  Te15  1  0.691  0.309  0.394  1.0
  O  O16  1  0.552  0.067  0.943  1.0
  O  O17  1  0.933  0.448  0.943  1.0
  O  O18  1  0.448  0.933  0.057  1.0
  O  O19  1  0.067  0.552  0.057  1.0
  O  O20  1  0.015  0.985  0.936  1.0
  O  O21  1  0.985  0.015  0.064  1.0
  O  O22  1  0.430  0.570  0.945  1.0
  O  O23  1  0.570  0.430  0.055  1.0
  O  O24  1  0.274  0.355  0.839  1.0
  O  O25  1  0.645  0.726  0.839  1.0
  O  O26  1  0.726  0.645  0.161  1.0
  O  O27  1  0.355  0.274  0.161  1.0
  O  O28  1  0.930  0.070  0.555  1.0
  O  O29  1  0.070  0.930  0.445  1.0
  O  O30  1  0.145  0.226  0.661  1.0
  O  O31  1  0.774  0.855  0.661  1.0
  O  O32  1  0.855  0.774  0.339  1.0
  O  O33  1  0.226  0.145  0.339  1.0
  O  O34  1  0.052  0.567  0.557  1.0
  O  O35  1  0.433  0.948  0.557  1.0
  O  O36  1  0.948  0.433  0.443  1.0
  O  O37  1  0.567  0.052  0.443  1.0
  O  O38  1  0.515  0.485  0.564  1.0
  O  O39  1  0.485  0.515  0.436  1.0
  O  O40  1  0.974  0.026  0.771  1.0
  O  O41  1  0.026  0.974  0.229  1.0
  O  O42  1  0.971  0.529  0.750  1.0
  O  O43  1  0.471  0.029  0.750  1.0
  O  O44  1  0.029  0.471  0.250  1.0
  O  O45  1  0.529  0.971  0.250  1.0
  O  O46  1  0.474  0.526  0.729  1.0
  O  O47  1  0.526  0.474  0.271  1.0
[/CIF]
.