The crystal structure described by Gd2Nb2N2O5 crystallizes in the triclinic P1 space group. There are eight inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 7-coordinate geometry to one N(1), one N(4), one N(8), one O(10), one O(2), one O(3), and one O(6) atom. In the second Gd site, Gd(2) is bonded in a 10-coordinate geometry to one N(3), one N(7), two equivalent N(2), one O(11), one O(14), one O(2), one O(4), one O(7), and one O(8) atom. In the third Gd site, Gd(3) is bonded in a 8-coordinate geometry to one O(1), one O(13), one O(14), one O(18), one O(4), one O(5), one O(8), and one O(9) atom. In the fourth Gd site, Gd(4) is bonded in a 8-coordinate geometry to one N(1), one O(10), one O(13), one O(15), one O(19), one O(3), one O(5), and one O(9) atom. In the fifth Gd site, Gd(5) is bonded in a 8-coordinate geometry to one N(4), one N(8), one O(10), one O(12), one O(15), one O(16), one O(20), and one O(6) atom. In the sixth Gd site, Gd(6) is bonded in a 8-coordinate geometry to one N(3), one N(7), one O(11), one O(12), one O(16), one O(17), one O(20), and one O(7) atom. In the seventh Gd site, Gd(7) is bonded in a 10-coordinate geometry to one N(3), one N(6), two equivalent N(5), one O(1), one O(11), one O(14), one O(17), one O(18), and one O(4) atom. In the eighth Gd site, Gd(8) is bonded in a 7-coordinate geometry to one N(1), one N(4), one N(6), one N(8), one O(15), one O(19), and one O(3) atom. There are eight inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one N(1), one N(6), one O(1), one O(3), one O(5), and one O(9) atom to form distorted NbN2O4 octahedra that share corners with two equivalent Nb(2)N2O4 octahedra and corners with two equivalent Nb(6)NO5 octahedra. The corner-sharing octahedral tilt angles range from 35-44°. In the second Nb site, Nb(2) is bonded to one N(3), one N(5), one O(1), one O(4), one O(5), and one O(8) atom to form NbN2O4 octahedra that share corners with two equivalent Nb(1)N2O4 octahedra, corners with two equivalent Nb(7)N3O3 octahedra, and corners with two equivalent Nb(5)NO5 octahedra. The corner-sharing octahedral tilt angles range from 23-44°. In the third Nb site, Nb(3) is bonded to one O(10), one O(12), one O(16), one O(2), one O(6), and one O(7) atom to form distorted NbO6 octahedra that share corners with two equivalent Nb(8)N3O3 octahedra and corners with two equivalent Nb(4)NO5 octahedra. The corner-sharing octahedral tilt angles range from 30-49°. In the fourth Nb site, Nb(4) is bonded to one N(2), one O(11), one O(12), one O(14), one O(17), and one O(7) atom to form distorted NbNO5 octahedra that share corners with two equivalent Nb(7)N3O3 octahedra, corners with two equivalent Nb(5)NO5 octahedra, and corners with two equivalent Nb(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-49°. In the fifth Nb site, Nb(5) is bonded to one N(5), one O(11), one O(13), one O(14), one O(18), and one O(8) atom to form distorted NbNO5 octahedra that share corners with two equivalent Nb(2)N2O4 octahedra, corners with two equivalent Nb(4)NO5 octahedra, and corners with two equivalent Nb(6)NO5 octahedra. The corner-sharing octahedral tilt angles range from 26-46°. In the sixth Nb site, Nb(6) is bonded to one N(6), one O(13), one O(15), one O(18), one O(19), and one O(9) atom to form distorted NbNO5 octahedra that share corners with two equivalent Nb(1)N2O4 octahedra and corners with two equivalent Nb(5)NO5 octahedra. The corner-sharing octahedral tilt angles range from 35-46°. In the seventh Nb site, Nb(7) is bonded to one N(2), one N(3), one N(7), one O(17), one O(20), and one O(4) atom to form distorted NbN3O3 octahedra that share corners with two equivalent Nb(2)N2O4 octahedra, corners with two equivalent Nb(8)N3O3 octahedra, and corners with two equivalent Nb(4)NO5 octahedra. The corner-sharing octahedral tilt angles range from 23-49°. In the eighth Nb site, Nb(8) is bonded to one N(4), one N(7), one N(8), one O(16), one O(2), and one O(20) atom to form distorted NbN3O3 octahedra that share corners with two equivalent Nb(7)N3O3 octahedra and corners with two equivalent Nb(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 30-49°. There are eight inequivalent N sites. In the first N site, N(1) is bonded to one Gd(1), one Gd(4), one Gd(8), and one Nb(1) atom to form NGd3Nb tetrahedra that share  a cornercorner with one O(1)Gd2Nb2 tetrahedra, corners with two equivalent N(8)Gd3Nb tetrahedra, corners with two equivalent O(15)Gd3Nb trigonal pyramids,  an edgeedge with one N(4)Gd3Nb tetrahedra, and edges with two equivalent O(3)Gd3Nb tetrahedra. In the second N site, N(2) is bonded in a 3-coordinate geometry to two equivalent Gd(2), one Nb(4), and one Nb(7) atom. In the third N site, N(3) is bonded in a 5-coordinate geometry to one Gd(2), one Gd(6), one Gd(7), one Nb(2), and one Nb(7) atom. In the fourth N site, N(4) is bonded to one Gd(1), one Gd(5), one Gd(8), and one Nb(8) atom to form distorted NGd3Nb tetrahedra that share  a cornercorner with one N(7)Gd2Nb2 tetrahedra, corners with two equivalent O(3)Gd3Nb tetrahedra, corners with two equivalent O(15)Gd3Nb trigonal pyramids,  an edgeedge with one N(1)Gd3Nb tetrahedra, and edges with two equivalent N(8)Gd3Nb tetrahedra. In the fifth N site, N(5) is bonded in a 3-coordinate geometry to two equivalent Gd(7), one Nb(2), and one Nb(5) atom. In the sixth N site, N(6) is bonded in a 3-coordinate geometry to one Gd(7), one Gd(8), one Nb(1), and one Nb(6) atom. In the seventh N site, N(7) is bonded to one Gd(2), one Gd(6), one Nb(7), and one Nb(8) atom to form NGd2Nb2 tetrahedra that share  a cornercorner with one N(4)Gd3Nb tetrahedra,  a cornercorner with one N(8)Gd3Nb tetrahedra,  a cornercorner with one O(8)Gd2Nb2 tetrahedra, corners with two equivalent O(7)Gd2Nb2 tetrahedra, and  an edgeedge with one O(17)Gd2Nb2 tetrahedra. In the eighth N site, N(8) is bonded to one Gd(1), one Gd(5), one Gd(8), and one Nb(8) atom to form NGd3Nb tetrahedra that share  a cornercorner with one N(7)Gd2Nb2 tetrahedra, corners with two equivalent N(1)Gd3Nb tetrahedra,  an edgeedge with one O(3)Gd3Nb tetrahedra, edges with two equivalent N(4)Gd3Nb tetrahedra, and  an edgeedge with one O(15)Gd3Nb trigonal pyramid. There are twenty inequivalent O sites. In the first O site, O(1) is bonded to one Gd(3), one Gd(7), one Nb(1), and one Nb(2) atom to form distorted OGd2Nb2 tetrahedra that share  a cornercorner with one N(1)Gd3Nb tetrahedra,  a cornercorner with one O(17)Gd2Nb2 tetrahedra,  a cornercorner with one O(3)Gd3Nb tetrahedra, corners with two equivalent O(18)Gd2Nb2 tetrahedra, and  an edgeedge with one O(8)Gd2Nb2 tetrahedra. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Gd(1), one Gd(2), one Nb(3), and one Nb(8) atom. In the third O site, O(3) is bonded to one Gd(1), one Gd(4), one Gd(8), and one Nb(1) atom to form distorted OGd3Nb tetrahedra that share  a cornercorner with one O(1)Gd2Nb2 tetrahedra, corners with two equivalent N(4)Gd3Nb tetrahedra, corners with two equivalent O(15)Gd3Nb trigonal pyramids,  an edgeedge with one N(8)Gd3Nb tetrahedra, and edges with two equivalent N(1)Gd3Nb tetrahedra. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Gd(2), one Gd(3), one Gd(7), one Nb(2), and one Nb(7) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Gd(3), one Gd(4), one Nb(1), and one Nb(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Gd(1), one Gd(5), and one Nb(3) atom. In the seventh O site, O(7) is bonded to one Gd(2), one Gd(6), one Nb(3), and one Nb(4) atom to form distorted OGd2Nb2 tetrahedra that share  a cornercorner with one O(8)Gd2Nb2 tetrahedra, corners with two equivalent N(7)Gd2Nb2 tetrahedra, and  an edgeedge with one O(17)Gd2Nb2 tetrahedra. In the eighth O site, O(8) is bonded to one Gd(2), one Gd(3), one Nb(2), and one Nb(5) atom to form distorted OGd2Nb2 tetrahedra that share  a cornercorner with one N(7)Gd2Nb2 tetrahedra,  a cornercorner with one O(7)Gd2Nb2 tetrahedra,  an edgeedge with one O(1)Gd2Nb2 tetrahedra, and  an edgeedge with one O(18)Gd2Nb2 tetrahedra. In the ninth O site, O(9) is bonded in a distorted see-saw-like geometry to one Gd(3), one Gd(4), one Nb(1), and one Nb(6) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Gd(1), one Gd(4), one Gd(5), and one Nb(3) atom. In the eleventh O site, O(11) is bonded in a 5-coordinate geometry to one Gd(2), one Gd(6), one Gd(7), one Nb(4), and one Nb(5) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Gd(5), one Gd(6), one Nb(3), and one Nb(4) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Gd(3), one Gd(4), one Nb(5), and one Nb(6) atom. In the fourteenth O site, O(14) is bonded in a 5-coordinate geometry to one Gd(2), one Gd(3), one Gd(7), one Nb(4), and one Nb(5) atom. In the fifteenth O site, O(15) is bonded to one Gd(4), one Gd(5), one Gd(8), and one Nb(6) atom to form distorted OGd3Nb trigonal pyramids that share  a cornercorner with one O(18)Gd2Nb2 tetrahedra, corners with two equivalent N(1)Gd3Nb tetrahedra, corners with two equivalent N(4)Gd3Nb tetrahedra, corners with two equivalent O(3)Gd3Nb tetrahedra, and  an edgeedge with one N(8)Gd3Nb tetrahedra. In the sixteenth O site, O(16) is bonded in a distorted see-saw-like geometry to one Gd(5), one Gd(6), one Nb(3), and one Nb(8) atom. In the seventeenth O site, O(17) is bonded to one Gd(6), one Gd(7), one Nb(4), and one Nb(7) atom to form distorted OGd2Nb2 tetrahedra that share  a cornercorner with one O(1)Gd2Nb2 tetrahedra,  a cornercorner with one O(18)Gd2Nb2 tetrahedra,  an edgeedge with one N(7)Gd2Nb2 tetrahedra, and  an edgeedge with one O(7)Gd2Nb2 tetrahedra. In the eighteenth O site, O(18) is bonded to one Gd(3), one Gd(7), one Nb(5), and one Nb(6) atom to form distorted OGd2Nb2 tetrahedra that share  a cornercorner with one O(17)Gd2Nb2 tetrahedra, corners with two equivalent O(1)Gd2Nb2 tetrahedra,  a cornercorner with one O(15)Gd3Nb trigonal pyramid, and  an edgeedge with one O(8)Gd2Nb2 tetrahedra. In the nineteenth O site, O(19) is bonded in a distorted trigonal planar geometry to one Gd(4), one Gd(8), and one Nb(6) atom. In the twentieth O site, O(20) is bonded in a 4-coordinate geometry to one Gd(5), one Gd(6), one Nb(7), and one Nb(8) atom. is represented by the CIF card [CIF]
data_Gd2Nb2N2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.893
_cell_length_b   13.589
_cell_length_c   5.545
_cell_angle_alpha   90.606
_cell_angle_beta   90.297
_cell_angle_gamma   98.487
_symmetry_Int_Tables_number   1
_cell_volume   588.225
_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
  Gd  Gd0  1  0.129  0.564  0.347  1.0
  Gd  Gd1  1  0.221  0.917  0.768  1.0
  Gd  Gd2  1  0.279  0.130  0.251  1.0
  Gd  Gd3  1  0.343  0.385  0.758  1.0
  Gd  Gd4  1  0.666  0.608  0.273  1.0
  Gd  Gd5  1  0.726  0.874  0.749  1.0
  Gd  Gd6  1  0.775  0.084  0.277  1.0
  Gd  Gd7  1  0.864  0.436  0.829  1.0
  Nb  Nb8  1  0.072  0.325  0.282  1.0
  Nb  Nb9  1  0.015  0.109  0.760  1.0
  Nb  Nb10  1  0.412  0.673  0.790  1.0
  Nb  Nb11  1  0.462  0.880  0.271  1.0
  Nb  Nb12  1  0.533  0.120  0.769  1.0
  Nb  Nb13  1  0.600  0.327  0.275  1.0
  Nb  Nb14  1  0.971  0.878  0.258  1.0
  Nb  Nb15  1  0.925  0.674  0.792  1.0
  N  N16  1  0.084  0.411  0.551  1.0
  N  N17  1  0.226  0.885  0.338  1.0
  N  N18  1  0.948  0.984  0.546  1.0
  N  N19  1  0.862  0.570  0.557  1.0
  N  N20  1  0.775  0.115  0.844  1.0
  N  N21  1  0.825  0.308  0.178  1.0
  N  N22  1  0.980  0.825  0.929  1.0
  N  N23  1  0.921  0.587  0.055  1.0
  O  O24  1  0.021  0.180  0.433  1.0
  O  O25  1  0.180  0.691  0.670  1.0
  O  O26  1  0.144  0.431  0.054  1.0
  O  O27  1  0.061  0.025  0.045  1.0
  O  O28  1  0.138  0.227  0.948  1.0
  O  O29  1  0.367  0.618  0.088  1.0
  O  O30  1  0.429  0.825  0.928  1.0
  O  O31  1  0.278  0.083  0.650  1.0
  O  O32  1  0.325  0.299  0.377  1.0
  O  O33  1  0.416  0.557  0.587  1.0
  O  O34  1  0.555  0.979  0.535  1.0
  O  O35  1  0.510  0.770  0.459  1.0
  O  O36  1  0.488  0.232  0.961  1.0
  O  O37  1  0.450  0.024  0.037  1.0
  O  O38  1  0.581  0.444  0.083  1.0
  O  O39  1  0.668  0.697  0.870  1.0
  O  O40  1  0.728  0.921  0.147  1.0
  O  O41  1  0.568  0.174  0.432  1.0
  O  O42  1  0.622  0.382  0.591  1.0
  O  O43  1  0.858  0.771  0.442  1.0
[/CIF]
.
The crystal structure described by Gd2Nb2N2O5 crystallizes in the triclinic P1 space group. There are eight inequivalent Gd sites. In the first Gd site, Gd(1) is bonded in a 7-coordinate geometry to one N(1), one N(4), one N(8), one O(10), one O(2), one O(3), and one O(6) atom. In the second Gd site, Gd(2) is bonded in a 10-coordinate geometry to one N(3), one N(7), two equivalent N(2), one O(11), one O(14), one O(2), one O(4), one O(7), and one O(8) atom. In the third Gd site, Gd(3) is bonded in a 8-coordinate geometry to one O(1), one O(13), one O(14), one O(18), one O(4), one O(5), one O(8), and one O(9) atom. In the fourth Gd site, Gd(4) is bonded in a 8-coordinate geometry to one N(1), one O(10), one O(13), one O(15), one O(19), one O(3), one O(5), and one O(9) atom. In the fifth Gd site, Gd(5) is bonded in a 8-coordinate geometry to one N(4), one N(8), one O(10), one O(12), one O(15), one O(16), one O(20), and one O(6) atom. In the sixth Gd site, Gd(6) is bonded in a 8-coordinate geometry to one N(3), one N(7), one O(11), one O(12), one O(16), one O(17), one O(20), and one O(7) atom. In the seventh Gd site, Gd(7) is bonded in a 10-coordinate geometry to one N(3), one N(6), two equivalent N(5), one O(1), one O(11), one O(14), one O(17), one O(18), and one O(4) atom. In the eighth Gd site, Gd(8) is bonded in a 7-coordinate geometry to one N(1), one N(4), one N(6), one N(8), one O(15), one O(19), and one O(3) atom. There are eight inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one N(1), one N(6), one O(1), one O(3), one O(5), and one O(9) atom to form distorted NbN2O4 octahedra that share corners with two equivalent Nb(2)N2O4 octahedra and corners with two equivalent Nb(6)NO5 octahedra. The corner-sharing octahedral tilt angles range from 35-44°. In the second Nb site, Nb(2) is bonded to one N(3), one N(5), one O(1), one O(4), one O(5), and one O(8) atom to form NbN2O4 octahedra that share corners with two equivalent Nb(1)N2O4 octahedra, corners with two equivalent Nb(7)N3O3 octahedra, and corners with two equivalent Nb(5)NO5 octahedra. The corner-sharing octahedral tilt angles range from 23-44°. In the third Nb site, Nb(3) is bonded to one O(10), one O(12), one O(16), one O(2), one O(6), and one O(7) atom to form distorted NbO6 octahedra that share corners with two equivalent Nb(8)N3O3 octahedra and corners with two equivalent Nb(4)NO5 octahedra. The corner-sharing octahedral tilt angles range from 30-49°. In the fourth Nb site, Nb(4) is bonded to one N(2), one O(11), one O(12), one O(14), one O(17), and one O(7) atom to form distorted NbNO5 octahedra that share corners with two equivalent Nb(7)N3O3 octahedra, corners with two equivalent Nb(5)NO5 octahedra, and corners with two equivalent Nb(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-49°. In the fifth Nb site, Nb(5) is bonded to one N(5), one O(11), one O(13), one O(14), one O(18), and one O(8) atom to form distorted NbNO5 octahedra that share corners with two equivalent Nb(2)N2O4 octahedra, corners with two equivalent Nb(4)NO5 octahedra, and corners with two equivalent Nb(6)NO5 octahedra. The corner-sharing octahedral tilt angles range from 26-46°. In the sixth Nb site, Nb(6) is bonded to one N(6), one O(13), one O(15), one O(18), one O(19), and one O(9) atom to form distorted NbNO5 octahedra that share corners with two equivalent Nb(1)N2O4 octahedra and corners with two equivalent Nb(5)NO5 octahedra. The corner-sharing octahedral tilt angles range from 35-46°. In the seventh Nb site, Nb(7) is bonded to one N(2), one N(3), one N(7), one O(17), one O(20), and one O(4) atom to form distorted NbN3O3 octahedra that share corners with two equivalent Nb(2)N2O4 octahedra, corners with two equivalent Nb(8)N3O3 octahedra, and corners with two equivalent Nb(4)NO5 octahedra. The corner-sharing octahedral tilt angles range from 23-49°. In the eighth Nb site, Nb(8) is bonded to one N(4), one N(7), one N(8), one O(16), one O(2), and one O(20) atom to form distorted NbN3O3 octahedra that share corners with two equivalent Nb(7)N3O3 octahedra and corners with two equivalent Nb(3)O6 octahedra. The corner-sharing octahedral tilt angles range from 30-49°. There are eight inequivalent N sites. In the first N site, N(1) is bonded to one Gd(1), one Gd(4), one Gd(8), and one Nb(1) atom to form NGd3Nb tetrahedra that share  a cornercorner with one O(1)Gd2Nb2 tetrahedra, corners with two equivalent N(8)Gd3Nb tetrahedra, corners with two equivalent O(15)Gd3Nb trigonal pyramids,  an edgeedge with one N(4)Gd3Nb tetrahedra, and edges with two equivalent O(3)Gd3Nb tetrahedra. In the second N site, N(2) is bonded in a 3-coordinate geometry to two equivalent Gd(2), one Nb(4), and one Nb(7) atom. In the third N site, N(3) is bonded in a 5-coordinate geometry to one Gd(2), one Gd(6), one Gd(7), one Nb(2), and one Nb(7) atom. In the fourth N site, N(4) is bonded to one Gd(1), one Gd(5), one Gd(8), and one Nb(8) atom to form distorted NGd3Nb tetrahedra that share  a cornercorner with one N(7)Gd2Nb2 tetrahedra, corners with two equivalent O(3)Gd3Nb tetrahedra, corners with two equivalent O(15)Gd3Nb trigonal pyramids,  an edgeedge with one N(1)Gd3Nb tetrahedra, and edges with two equivalent N(8)Gd3Nb tetrahedra. In the fifth N site, N(5) is bonded in a 3-coordinate geometry to two equivalent Gd(7), one Nb(2), and one Nb(5) atom. In the sixth N site, N(6) is bonded in a 3-coordinate geometry to one Gd(7), one Gd(8), one Nb(1), and one Nb(6) atom. In the seventh N site, N(7) is bonded to one Gd(2), one Gd(6), one Nb(7), and one Nb(8) atom to form NGd2Nb2 tetrahedra that share  a cornercorner with one N(4)Gd3Nb tetrahedra,  a cornercorner with one N(8)Gd3Nb tetrahedra,  a cornercorner with one O(8)Gd2Nb2 tetrahedra, corners with two equivalent O(7)Gd2Nb2 tetrahedra, and  an edgeedge with one O(17)Gd2Nb2 tetrahedra. In the eighth N site, N(8) is bonded to one Gd(1), one Gd(5), one Gd(8), and one Nb(8) atom to form NGd3Nb tetrahedra that share  a cornercorner with one N(7)Gd2Nb2 tetrahedra, corners with two equivalent N(1)Gd3Nb tetrahedra,  an edgeedge with one O(3)Gd3Nb tetrahedra, edges with two equivalent N(4)Gd3Nb tetrahedra, and  an edgeedge with one O(15)Gd3Nb trigonal pyramid. There are twenty inequivalent O sites. In the first O site, O(1) is bonded to one Gd(3), one Gd(7), one Nb(1), and one Nb(2) atom to form distorted OGd2Nb2 tetrahedra that share  a cornercorner with one N(1)Gd3Nb tetrahedra,  a cornercorner with one O(17)Gd2Nb2 tetrahedra,  a cornercorner with one O(3)Gd3Nb tetrahedra, corners with two equivalent O(18)Gd2Nb2 tetrahedra, and  an edgeedge with one O(8)Gd2Nb2 tetrahedra. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Gd(1), one Gd(2), one Nb(3), and one Nb(8) atom. In the third O site, O(3) is bonded to one Gd(1), one Gd(4), one Gd(8), and one Nb(1) atom to form distorted OGd3Nb tetrahedra that share  a cornercorner with one O(1)Gd2Nb2 tetrahedra, corners with two equivalent N(4)Gd3Nb tetrahedra, corners with two equivalent O(15)Gd3Nb trigonal pyramids,  an edgeedge with one N(8)Gd3Nb tetrahedra, and edges with two equivalent N(1)Gd3Nb tetrahedra. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Gd(2), one Gd(3), one Gd(7), one Nb(2), and one Nb(7) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Gd(3), one Gd(4), one Nb(1), and one Nb(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Gd(1), one Gd(5), and one Nb(3) atom. In the seventh O site, O(7) is bonded to one Gd(2), one Gd(6), one Nb(3), and one Nb(4) atom to form distorted OGd2Nb2 tetrahedra that share  a cornercorner with one O(8)Gd2Nb2 tetrahedra, corners with two equivalent N(7)Gd2Nb2 tetrahedra, and  an edgeedge with one O(17)Gd2Nb2 tetrahedra. In the eighth O site, O(8) is bonded to one Gd(2), one Gd(3), one Nb(2), and one Nb(5) atom to form distorted OGd2Nb2 tetrahedra that share  a cornercorner with one N(7)Gd2Nb2 tetrahedra,  a cornercorner with one O(7)Gd2Nb2 tetrahedra,  an edgeedge with one O(1)Gd2Nb2 tetrahedra, and  an edgeedge with one O(18)Gd2Nb2 tetrahedra. In the ninth O site, O(9) is bonded in a distorted see-saw-like geometry to one Gd(3), one Gd(4), one Nb(1), and one Nb(6) atom. In the tenth O site, O(10) is bonded in a 4-coordinate geometry to one Gd(1), one Gd(4), one Gd(5), and one Nb(3) atom. In the eleventh O site, O(11) is bonded in a 5-coordinate geometry to one Gd(2), one Gd(6), one Gd(7), one Nb(4), and one Nb(5) atom. In the twelfth O site, O(12) is bonded in a 4-coordinate geometry to one Gd(5), one Gd(6), one Nb(3), and one Nb(4) atom. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Gd(3), one Gd(4), one Nb(5), and one Nb(6) atom. In the fourteenth O site, O(14) is bonded in a 5-coordinate geometry to one Gd(2), one Gd(3), one Gd(7), one Nb(4), and one Nb(5) atom. In the fifteenth O site, O(15) is bonded to one Gd(4), one Gd(5), one Gd(8), and one Nb(6) atom to form distorted OGd3Nb trigonal pyramids that share  a cornercorner with one O(18)Gd2Nb2 tetrahedra, corners with two equivalent N(1)Gd3Nb tetrahedra, corners with two equivalent N(4)Gd3Nb tetrahedra, corners with two equivalent O(3)Gd3Nb tetrahedra, and  an edgeedge with one N(8)Gd3Nb tetrahedra. In the sixteenth O site, O(16) is bonded in a distorted see-saw-like geometry to one Gd(5), one Gd(6), one Nb(3), and one Nb(8) atom. In the seventeenth O site, O(17) is bonded to one Gd(6), one Gd(7), one Nb(4), and one Nb(7) atom to form distorted OGd2Nb2 tetrahedra that share  a cornercorner with one O(1)Gd2Nb2 tetrahedra,  a cornercorner with one O(18)Gd2Nb2 tetrahedra,  an edgeedge with one N(7)Gd2Nb2 tetrahedra, and  an edgeedge with one O(7)Gd2Nb2 tetrahedra. In the eighteenth O site, O(18) is bonded to one Gd(3), one Gd(7), one Nb(5), and one Nb(6) atom to form distorted OGd2Nb2 tetrahedra that share  a cornercorner with one O(17)Gd2Nb2 tetrahedra, corners with two equivalent O(1)Gd2Nb2 tetrahedra,  a cornercorner with one O(15)Gd3Nb trigonal pyramid, and  an edgeedge with one O(8)Gd2Nb2 tetrahedra. In the nineteenth O site, O(19) is bonded in a distorted trigonal planar geometry to one Gd(4), one Gd(8), and one Nb(6) atom. In the twentieth O site, O(20) is bonded in a 4-coordinate geometry to one Gd(5), one Gd(6), one Nb(7), and one Nb(8) atom. is represented by the CIF card [CIF]
data_Gd2Nb2N2O5
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.893
_cell_length_b   13.589
_cell_length_c   5.545
_cell_angle_alpha   90.606
_cell_angle_beta   90.297
_cell_angle_gamma   98.487
_symmetry_Int_Tables_number   1
_cell_volume   588.225
_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
  Gd  Gd0  1  0.129  0.564  0.347  1.0
  Gd  Gd1  1  0.221  0.917  0.768  1.0
  Gd  Gd2  1  0.279  0.130  0.251  1.0
  Gd  Gd3  1  0.343  0.385  0.758  1.0
  Gd  Gd4  1  0.666  0.608  0.273  1.0
  Gd  Gd5  1  0.726  0.874  0.749  1.0
  Gd  Gd6  1  0.775  0.084  0.277  1.0
  Gd  Gd7  1  0.864  0.436  0.829  1.0
  Nb  Nb8  1  0.072  0.325  0.282  1.0
  Nb  Nb9  1  0.015  0.109  0.760  1.0
  Nb  Nb10  1  0.412  0.673  0.790  1.0
  Nb  Nb11  1  0.462  0.880  0.271  1.0
  Nb  Nb12  1  0.533  0.120  0.769  1.0
  Nb  Nb13  1  0.600  0.327  0.275  1.0
  Nb  Nb14  1  0.971  0.878  0.258  1.0
  Nb  Nb15  1  0.925  0.674  0.792  1.0
  N  N16  1  0.084  0.411  0.551  1.0
  N  N17  1  0.226  0.885  0.338  1.0
  N  N18  1  0.948  0.984  0.546  1.0
  N  N19  1  0.862  0.570  0.557  1.0
  N  N20  1  0.775  0.115  0.844  1.0
  N  N21  1  0.825  0.308  0.178  1.0
  N  N22  1  0.980  0.825  0.929  1.0
  N  N23  1  0.921  0.587  0.055  1.0
  O  O24  1  0.021  0.180  0.433  1.0
  O  O25  1  0.180  0.691  0.670  1.0
  O  O26  1  0.144  0.431  0.054  1.0
  O  O27  1  0.061  0.025  0.045  1.0
  O  O28  1  0.138  0.227  0.948  1.0
  O  O29  1  0.367  0.618  0.088  1.0
  O  O30  1  0.429  0.825  0.928  1.0
  O  O31  1  0.278  0.083  0.650  1.0
  O  O32  1  0.325  0.299  0.377  1.0
  O  O33  1  0.416  0.557  0.587  1.0
  O  O34  1  0.555  0.979  0.535  1.0
  O  O35  1  0.510  0.770  0.459  1.0
  O  O36  1  0.488  0.232  0.961  1.0
  O  O37  1  0.450  0.024  0.037  1.0
  O  O38  1  0.581  0.444  0.083  1.0
  O  O39  1  0.668  0.697  0.870  1.0
  O  O40  1  0.728  0.921  0.147  1.0
  O  O41  1  0.568  0.174  0.432  1.0
  O  O42  1  0.622  0.382  0.591  1.0
  O  O43  1  0.858  0.771  0.442  1.0
[/CIF]
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