Eu2NbBiO6 crystallizes in the cubic Pn-3 space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a q6 geometry to twelve equivalent O(1) atoms. In the second Eu site, Eu(2) is bonded in a distorted square co-planar geometry to four equivalent O(1) atoms. Nb(1) is bonded to six equivalent O(1) atoms to form NbO6 octahedra that share corners with six equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles are 28°. Bi(1) is bonded to six equivalent O(1) atoms to form BiO6 octahedra that share corners with six equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles are 28°. O(1) is bonded in a 3-coordinate geometry to one Eu(1), one Eu(2), one Nb(1), and one Bi(1) atom.
Eu2NbBiO6 crystallizes in the cubic Pn-3 space group. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a q6 geometry to twelve equivalent O(1) atoms. All Eu(1)-O(1) bond lengths are 3.02 Å. In the second Eu site, Eu(2) is bonded in a distorted square co-planar geometry to four equivalent O(1) atoms. All Eu(2)-O(1) bond lengths are 2.49 Å. Nb(1) is bonded to six equivalent O(1) atoms to form NbO6 octahedra that share corners with six equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles are 28°. All Nb(1)-O(1) bond lengths are 2.04 Å. Bi(1) is bonded to six equivalent O(1) atoms to form BiO6 octahedra that share corners with six equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles are 28°. All Bi(1)-O(1) bond lengths are 2.36 Å. O(1) is bonded in a 3-coordinate geometry to one Eu(1), one Eu(2), one Nb(1), and one Bi(1) atom.