The compound described by Nb2WZn2O8 crystallizes in the triclinic P-1 space group. 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), one O(6), and one O(8) atom to form distorted NbO6 octahedra that share corners with four equivalent W(1)O6 octahedra and edges with two equivalent Nb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-57°. In the second Nb site, Nb(2) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(7) atom to form NbO6 octahedra that share corners with four equivalent W(1)O6 octahedra and edges with two equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-56°. W(1) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form WO6 octahedra that share corners with four equivalent Nb(1)O6 octahedra, corners with four equivalent Nb(2)O6 octahedra, and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-57°. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a distorted see-saw-like geometry to one O(5), one O(7), and two equivalent O(8) atoms. In the second Zn site, Zn(2) is bonded in a 5-coordinate geometry to one O(5), one O(6), one O(8), and two equivalent O(7) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Nb(1), one Nb(2), and one W(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Nb(1), one Nb(2), and one W(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Nb(1) and two equivalent W(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Nb(2) and two equivalent W(1) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Nb(1), one Nb(2), one Zn(1), and one Zn(2) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Nb(1), one Nb(2), and one Zn(2) atom. In the seventh O site, O(7) is bonded to one Nb(2), one Zn(1), and two equivalent Zn(2) atoms to form a mixture of distorted corner and edge-sharing ONbZn3 trigonal pyramids. In the eighth O site, O(8) is bonded to one Nb(1), one Zn(2), and two equivalent Zn(1) atoms to form a mixture of corner and edge-sharing ONbZn3 trigonal pyramids. is represented by the CIF card [CIF]
data_Nb2Zn2WO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.390
_cell_length_b   5.914
_cell_length_c   10.203
_cell_angle_alpha   104.094
_cell_angle_beta   90.719
_cell_angle_gamma   91.721
_symmetry_Int_Tables_number   1
_cell_volume   315.212
_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
  Nb  Nb0  1  0.708  0.241  0.243  1.0
  Nb  Nb1  1  0.729  0.018  0.768  1.0
  Nb  Nb2  1  0.292  0.759  0.757  1.0
  Nb  Nb3  1  0.271  0.982  0.232  1.0
  Zn  Zn4  1  0.782  0.434  0.565  1.0
  Zn  Zn5  1  0.726  0.857  0.441  1.0
  Zn  Zn6  1  0.218  0.566  0.435  1.0
  Zn  Zn7  1  0.274  0.143  0.559  1.0
  W  W8  1  0.755  0.639  0.994  1.0
  W  W9  1  0.245  0.361  0.006  1.0
  O  O10  1  0.087  0.191  0.137  1.0
  O  O11  1  0.407  0.090  0.877  1.0
  O  O12  1  0.913  0.809  0.863  1.0
  O  O13  1  0.593  0.910  0.123  1.0
  O  O14  1  0.594  0.430  0.115  1.0
  O  O15  1  0.898  0.327  0.895  1.0
  O  O16  1  0.406  0.570  0.885  1.0
  O  O17  1  0.102  0.673  0.105  1.0
  O  O18  1  0.416  0.291  0.369  1.0
  O  O19  1  0.079  0.938  0.653  1.0
  O  O20  1  0.358  0.847  0.388  1.0
  O  O21  1  0.140  0.459  0.612  1.0
  O  O22  1  0.642  0.153  0.612  1.0
  O  O23  1  0.860  0.541  0.388  1.0
  O  O24  1  0.921  0.062  0.347  1.0
  O  O25  1  0.584  0.709  0.631  1.0
[/CIF]
.
The compound described by Nb2WZn2O8 crystallizes in the triclinic P-1 space group. 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), one O(6), and one O(8) atom to form distorted NbO6 octahedra that share corners with four equivalent W(1)O6 octahedra and edges with two equivalent Nb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-57°. In the second Nb site, Nb(2) is bonded to one O(1), one O(2), one O(4), one O(5), one O(6), and one O(7) atom to form NbO6 octahedra that share corners with four equivalent W(1)O6 octahedra and edges with two equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-56°. W(1) is bonded to one O(1), one O(2), two equivalent O(3), and two equivalent O(4) atoms to form WO6 octahedra that share corners with four equivalent Nb(1)O6 octahedra, corners with four equivalent Nb(2)O6 octahedra, and edges with two equivalent W(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 40-57°. There are two inequivalent Zn sites. In the first Zn site, Zn(1) is bonded in a distorted see-saw-like geometry to one O(5), one O(7), and two equivalent O(8) atoms. In the second Zn site, Zn(2) is bonded in a 5-coordinate geometry to one O(5), one O(6), one O(8), and two equivalent O(7) atoms. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Nb(1), one Nb(2), and one W(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Nb(1), one Nb(2), and one W(1) atom. In the third O site, O(3) is bonded in a distorted trigonal planar geometry to one Nb(1) and two equivalent W(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to one Nb(2) and two equivalent W(1) atoms. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Nb(1), one Nb(2), one Zn(1), and one Zn(2) atom. In the sixth O site, O(6) is bonded in a trigonal non-coplanar geometry to one Nb(1), one Nb(2), and one Zn(2) atom. In the seventh O site, O(7) is bonded to one Nb(2), one Zn(1), and two equivalent Zn(2) atoms to form a mixture of distorted corner and edge-sharing ONbZn3 trigonal pyramids. In the eighth O site, O(8) is bonded to one Nb(1), one Zn(2), and two equivalent Zn(1) atoms to form a mixture of corner and edge-sharing ONbZn3 trigonal pyramids. is represented by the CIF card [CIF]
data_Nb2Zn2WO8
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.390
_cell_length_b   5.914
_cell_length_c   10.203
_cell_angle_alpha   104.094
_cell_angle_beta   90.719
_cell_angle_gamma   91.721
_symmetry_Int_Tables_number   1
_cell_volume   315.212
_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
  Nb  Nb0  1  0.708  0.241  0.243  1.0
  Nb  Nb1  1  0.729  0.018  0.768  1.0
  Nb  Nb2  1  0.292  0.759  0.757  1.0
  Nb  Nb3  1  0.271  0.982  0.232  1.0
  Zn  Zn4  1  0.782  0.434  0.565  1.0
  Zn  Zn5  1  0.726  0.857  0.441  1.0
  Zn  Zn6  1  0.218  0.566  0.435  1.0
  Zn  Zn7  1  0.274  0.143  0.559  1.0
  W  W8  1  0.755  0.639  0.994  1.0
  W  W9  1  0.245  0.361  0.006  1.0
  O  O10  1  0.087  0.191  0.137  1.0
  O  O11  1  0.407  0.090  0.877  1.0
  O  O12  1  0.913  0.809  0.863  1.0
  O  O13  1  0.593  0.910  0.123  1.0
  O  O14  1  0.594  0.430  0.115  1.0
  O  O15  1  0.898  0.327  0.895  1.0
  O  O16  1  0.406  0.570  0.885  1.0
  O  O17  1  0.102  0.673  0.105  1.0
  O  O18  1  0.416  0.291  0.369  1.0
  O  O19  1  0.079  0.938  0.653  1.0
  O  O20  1  0.358  0.847  0.388  1.0
  O  O21  1  0.140  0.459  0.612  1.0
  O  O22  1  0.642  0.153  0.612  1.0
  O  O23  1  0.860  0.541  0.388  1.0
  O  O24  1  0.921  0.062  0.347  1.0
  O  O25  1  0.584  0.709  0.631  1.0
[/CIF]
.