The structure described by K2YNb5O15 crystallizes in the orthorhombic Cmmm space group. K(1) is bonded in a 13-coordinate geometry to one O(6), two equivalent O(2), two equivalent O(4), four equivalent O(3), and four equivalent O(5) atoms. Y(1) is bonded in a body-centered cubic geometry to four equivalent O(1) and four equivalent O(4) atoms. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(1), one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 0-36°. In the second Nb site, Nb(2) is bonded to two equivalent O(6) and four equivalent O(3) atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 0-28°. There are six inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Y(1) and two equivalent Nb(1) atoms to form a mixture of distorted corner and edge-sharing OY2Nb2 tetrahedra. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1) and two equivalent Nb(1) atoms. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Nb(1), and one Nb(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one K(1), one Y(1), and two equivalent Nb(1) atoms. In the fifth O site, O(5) is bonded in a linear geometry to four equivalent K(1) and two equivalent Nb(1) atoms. In the sixth O site, O(6) is bonded in a linear geometry to two equivalent K(1) and two equivalent Nb(2) atoms. is represented by the CIF file [CIF]
data_K2YNb5O15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.352
_cell_length_b   9.352
_cell_length_c   3.975
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   111.887
_symmetry_Int_Tables_number   1
_cell_volume   322.593
_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
  K  K0  1  0.298  0.702  0.000  1.0
  K  K1  1  0.702  0.298  0.000  1.0
  Y  Y2  1  0.000  0.000  0.000  1.0
  Nb  Nb3  1  0.318  0.059  0.500  1.0
  Nb  Nb4  1  0.059  0.318  0.500  1.0
  Nb  Nb5  1  0.682  0.941  0.500  1.0
  Nb  Nb6  1  0.941  0.682  0.500  1.0
  Nb  Nb7  1  0.500  0.500  0.500  1.0
  O  O8  1  0.127  0.127  0.500  1.0
  O  O9  1  0.161  0.839  0.500  1.0
  O  O10  1  0.273  0.458  0.500  1.0
  O  O11  1  0.839  0.161  0.500  1.0
  O  O12  1  0.873  0.873  0.500  1.0
  O  O13  1  0.279  0.048  0.000  1.0
  O  O14  1  0.721  0.952  0.000  1.0
  O  O15  1  0.542  0.727  0.500  1.0
  O  O16  1  0.048  0.279  0.000  1.0
  O  O17  1  0.500  0.000  0.500  1.0
  O  O18  1  0.458  0.273  0.500  1.0
  O  O19  1  0.952  0.721  0.000  1.0
  O  O20  1  0.500  0.500  0.000  1.0
  O  O21  1  0.727  0.542  0.500  1.0
  O  O22  1  0.000  0.500  0.500  1.0
[/CIF]
.
The structure described by K2YNb5O15 crystallizes in the orthorhombic Cmmm space group. K(1) is bonded in a 13-coordinate geometry to one O(6), two equivalent O(2), two equivalent O(4), four equivalent O(3), and four equivalent O(5) atoms. Y(1) is bonded in a body-centered cubic geometry to four equivalent O(1) and four equivalent O(4) atoms. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(1), one O(2), one O(3), one O(5), and two equivalent O(4) atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 0-36°. In the second Nb site, Nb(2) is bonded to two equivalent O(6) and four equivalent O(3) atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 0-28°. There are six inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Y(1) and two equivalent Nb(1) atoms to form a mixture of distorted corner and edge-sharing OY2Nb2 tetrahedra. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1) and two equivalent Nb(1) atoms. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to two equivalent K(1), one Nb(1), and one Nb(2) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one K(1), one Y(1), and two equivalent Nb(1) atoms. In the fifth O site, O(5) is bonded in a linear geometry to four equivalent K(1) and two equivalent Nb(1) atoms. In the sixth O site, O(6) is bonded in a linear geometry to two equivalent K(1) and two equivalent Nb(2) atoms. is represented by the CIF file [CIF]
data_K2YNb5O15
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   9.352
_cell_length_b   9.352
_cell_length_c   3.975
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   111.887
_symmetry_Int_Tables_number   1
_cell_volume   322.593
_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
  K  K0  1  0.298  0.702  0.000  1.0
  K  K1  1  0.702  0.298  0.000  1.0
  Y  Y2  1  0.000  0.000  0.000  1.0
  Nb  Nb3  1  0.318  0.059  0.500  1.0
  Nb  Nb4  1  0.059  0.318  0.500  1.0
  Nb  Nb5  1  0.682  0.941  0.500  1.0
  Nb  Nb6  1  0.941  0.682  0.500  1.0
  Nb  Nb7  1  0.500  0.500  0.500  1.0
  O  O8  1  0.127  0.127  0.500  1.0
  O  O9  1  0.161  0.839  0.500  1.0
  O  O10  1  0.273  0.458  0.500  1.0
  O  O11  1  0.839  0.161  0.500  1.0
  O  O12  1  0.873  0.873  0.500  1.0
  O  O13  1  0.279  0.048  0.000  1.0
  O  O14  1  0.721  0.952  0.000  1.0
  O  O15  1  0.542  0.727  0.500  1.0
  O  O16  1  0.048  0.279  0.000  1.0
  O  O17  1  0.500  0.000  0.500  1.0
  O  O18  1  0.458  0.273  0.500  1.0
  O  O19  1  0.952  0.721  0.000  1.0
  O  O20  1  0.500  0.500  0.000  1.0
  O  O21  1  0.727  0.542  0.500  1.0
  O  O22  1  0.000  0.500  0.500  1.0
[/CIF]
.