YNb2NO5 crystallizes in the monoclinic Pc space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 8-coordinate geometry to one N(2), one O(1), one O(2), one O(3), one O(4), one O(6), one O(7), and one O(8) atom. In the second Y site, Y(2) is bonded in a 8-coordinate geometry to one N(2), one O(1), one O(2), one O(3), one O(4), one O(6), one O(7), and one O(8) atom. There are four inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to two equivalent N(1), one O(2), one O(3), one O(4), and one O(5) atom to form distorted corner-sharing NbN2O4 octahedra. The corner-sharing octahedral tilt angles are 55°. In the second Nb site, Nb(2) is bonded in a 6-coordinate geometry to one N(1), one O(1), one O(3), one O(4), and two equivalent O(5) atoms. In the third Nb site, Nb(3) is bonded in a 6-coordinate geometry to one N(2), one O(7), one O(8), one O(9), and two equivalent O(10) atoms. In the fourth Nb site, Nb(4) is bonded in a 6-coordinate geometry to one O(10), one O(6), one O(7), one O(8), and two equivalent O(9) atoms. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Nb(2) and two equivalent Nb(1) atoms. In the second N site, N(2) is bonded in a distorted trigonal non-coplanar geometry to one Y(1), one Y(2), and one Nb(3) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Y(1), one Y(2), and one Nb(2) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Y(1), one Y(2), and one Nb(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Y(1), one Y(2), one Nb(1), and one Nb(2) atom. In the fourth O site, O(4) is bonded in a distorted tetrahedral geometry to one Y(1), one Y(2), one Nb(1), and one Nb(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Nb(1) and two equivalent Nb(2) atoms. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Y(1), one Y(2), and one Nb(4) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Y(1), one Y(2), one Nb(3), and one Nb(4) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Y(1), one Y(2), one Nb(3), and one Nb(4) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Nb(3) and two equivalent Nb(4) atoms. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Nb(4) and two equivalent Nb(3) atoms.
YNb2NO5 crystallizes in the monoclinic Pc space group. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 8-coordinate geometry to one N(2), one O(1), one O(2), one O(3), one O(4), one O(6), one O(7), and one O(8) atom. The Y(1)-N(2) bond length is 2.37 Å. The Y(1)-O(1) bond length is 2.41 Å. The Y(1)-O(2) bond length is 2.27 Å. The Y(1)-O(3) bond length is 2.30 Å. The Y(1)-O(4) bond length is 2.50 Å. The Y(1)-O(6) bond length is 2.35 Å. The Y(1)-O(7) bond length is 2.66 Å. The Y(1)-O(8) bond length is 2.31 Å. In the second Y site, Y(2) is bonded in a 8-coordinate geometry to one N(2), one O(1), one O(2), one O(3), one O(4), one O(6), one O(7), and one O(8) atom. The Y(2)-N(2) bond length is 2.33 Å. The Y(2)-O(1) bond length is 2.32 Å. The Y(2)-O(2) bond length is 2.37 Å. The Y(2)-O(3) bond length is 2.64 Å. The Y(2)-O(4) bond length is 2.31 Å. The Y(2)-O(6) bond length is 2.42 Å. The Y(2)-O(7) bond length is 2.33 Å. The Y(2)-O(8) bond length is 2.56 Å. There are four inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to two equivalent N(1), one O(2), one O(3), one O(4), and one O(5) atom to form distorted corner-sharing NbN2O4 octahedra. The corner-sharing octahedral tilt angles are 55°. There is one shorter (1.90 Å) and one longer (2.23 Å) Nb(1)-N(1) bond length. The Nb(1)-O(2) bond length is 1.90 Å. The Nb(1)-O(3) bond length is 2.01 Å. The Nb(1)-O(4) bond length is 2.28 Å. The Nb(1)-O(5) bond length is 2.07 Å. In the second Nb site, Nb(2) is bonded in a 6-coordinate geometry to one N(1), one O(1), one O(3), one O(4), and two equivalent O(5) atoms. The Nb(2)-N(1) bond length is 2.03 Å. The Nb(2)-O(1) bond length is 1.85 Å. The Nb(2)-O(3) bond length is 2.16 Å. The Nb(2)-O(4) bond length is 2.00 Å. There is one shorter (1.96 Å) and one longer (2.39 Å) Nb(2)-O(5) bond length. In the third Nb site, Nb(3) is bonded in a 6-coordinate geometry to one N(2), one O(7), one O(8), one O(9), and two equivalent O(10) atoms. The Nb(3)-N(2) bond length is 1.79 Å. The Nb(3)-O(7) bond length is 2.02 Å. The Nb(3)-O(8) bond length is 2.14 Å. The Nb(3)-O(9) bond length is 2.12 Å. There is one shorter (2.00 Å) and one longer (2.46 Å) Nb(3)-O(10) bond length. In the fourth Nb site, Nb(4) is bonded in a 6-coordinate geometry to one O(10), one O(6), one O(7), one O(8), and two equivalent O(9) atoms. The Nb(4)-O(10) bond length is 2.00 Å. The Nb(4)-O(6) bond length is 1.84 Å. The Nb(4)-O(7) bond length is 2.14 Å. The Nb(4)-O(8) bond length is 2.00 Å. There is one shorter (1.94 Å) and one longer (2.35 Å) Nb(4)-O(9) bond length. There are two inequivalent N sites. In the first N site, N(1) is bonded in a distorted trigonal planar geometry to one Nb(2) and two equivalent Nb(1) atoms. In the second N site, N(2) is bonded in a distorted trigonal non-coplanar geometry to one Y(1), one Y(2), and one Nb(3) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to one Y(1), one Y(2), and one Nb(2) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Y(1), one Y(2), and one Nb(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Y(1), one Y(2), one Nb(1), and one Nb(2) atom. In the fourth O site, O(4) is bonded in a distorted tetrahedral geometry to one Y(1), one Y(2), one Nb(1), and one Nb(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Nb(1) and two equivalent Nb(2) atoms. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Y(1), one Y(2), and one Nb(4) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Y(1), one Y(2), one Nb(3), and one Nb(4) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Y(1), one Y(2), one Nb(3), and one Nb(4) atom. In the ninth O site, O(9) is bonded in a distorted trigonal planar geometry to one Nb(3) and two equivalent Nb(4) atoms. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to one Nb(4) and two equivalent Nb(3) atoms.