EuNbO4 crystallizes in the monoclinic C2/c space group. Eu(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. Nb(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Eu(1) and one Nb(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Eu(1) and two equivalent Nb(1) atoms.
EuNbO4 crystallizes in the monoclinic C2/c space group. Eu(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(2) atoms. There are two shorter (2.38 Å) and two longer (2.42 Å) Eu(1)-O(1) bond lengths. There are two shorter (2.40 Å) and two longer (2.45 Å) Eu(1)-O(2) bond lengths. Nb(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. Both Nb(1)-O(1) bond lengths are 1.88 Å. There are two shorter (1.95 Å) and two longer (2.45 Å) Nb(1)-O(2) bond lengths. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal non-coplanar geometry to two equivalent Eu(1) and one Nb(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Eu(1) and two equivalent Nb(1) atoms.