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.
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. Both Y(1)-O(2) bond lengths are 2.43 Å. Both Y(1)-O(3) bond lengths are 2.34 Å. There are two shorter (2.39 Å) and two longer (2.49 Å) Y(1)-O(1) bond lengths. 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°. Both Nb(1)-O(4) bond lengths are 2.07 Å. Both Nb(1)-O(5) bond lengths are 1.99 Å. There is one shorter (1.83 Å) and one longer (2.24 Å) Nb(1)-O(6) bond length. 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. The Te(1)-O(2) bond length is 1.92 Å. Both Te(1)-O(1) bond lengths are 1.91 Å. 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. The Te(2)-O(3) bond length is 1.88 Å. Both Te(2)-O(4) bond lengths are 1.93 Å. 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.