BaEuPrNbO6 is Orthorhombic Perovskite-derived structured and crystallizes in the orthorhombic Pnnn space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a q6 geometry to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms. In the second Ba site, Ba(2) is bonded in a 8-coordinate geometry to four equivalent O(2) and four equivalent O(3) atoms. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a distorted square co-planar geometry to four equivalent O(1) and four equivalent O(2) atoms. In the second Eu site, Eu(2) is bonded in a distorted square co-planar geometry to four equivalent O(1) and four equivalent O(3) atoms. Pr(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form PrO6 octahedra that share corners with six equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 23-26°. Nb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NbO6 octahedra that share corners with six equivalent Pr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 23-26°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ba(1), one Eu(1), one Eu(2), one Pr(1), and one Nb(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Ba(1), one Ba(2), one Eu(1), one Pr(1), and one Nb(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Ba(1), one Ba(2), one Eu(2), one Pr(1), and one Nb(1) atom.
BaEuPrNbO6 is Orthorhombic Perovskite-derived structured and crystallizes in the orthorhombic Pnnn space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a q6 geometry to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms. All Ba(1)-O(1) bond lengths are 3.05 Å. All Ba(1)-O(2) bond lengths are 3.07 Å. All Ba(1)-O(3) bond lengths are 3.06 Å. In the second Ba site, Ba(2) is bonded in a 8-coordinate geometry to four equivalent O(2) and four equivalent O(3) atoms. All Ba(2)-O(2) bond lengths are 3.13 Å. All Ba(2)-O(3) bond lengths are 2.64 Å. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a distorted square co-planar geometry to four equivalent O(1) and four equivalent O(2) atoms. All Eu(1)-O(1) bond lengths are 3.14 Å. All Eu(1)-O(2) bond lengths are 2.55 Å. In the second Eu site, Eu(2) is bonded in a distorted square co-planar geometry to four equivalent O(1) and four equivalent O(3) atoms. All Eu(2)-O(1) bond lengths are 2.55 Å. All Eu(2)-O(3) bond lengths are 3.13 Å. Pr(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form PrO6 octahedra that share corners with six equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 23-26°. Both Pr(1)-O(1) bond lengths are 2.39 Å. Both Pr(1)-O(2) bond lengths are 2.39 Å. Both Pr(1)-O(3) bond lengths are 2.36 Å. Nb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NbO6 octahedra that share corners with six equivalent Pr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 23-26°. Both Nb(1)-O(1) bond lengths are 2.06 Å. Both Nb(1)-O(2) bond lengths are 2.06 Å. Both Nb(1)-O(3) bond lengths are 2.02 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ba(1), one Eu(1), one Eu(2), one Pr(1), and one Nb(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to one Ba(1), one Ba(2), one Eu(1), one Pr(1), and one Nb(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Ba(1), one Ba(2), one Eu(2), one Pr(1), and one Nb(1) atom.