SrEuNbBiO6 crystallizes in the orthorhombic P222 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted square co-planar geometry to four equivalent O(5) atoms. In the second Sr site, Sr(2) is bonded in a distorted square co-planar geometry to four equivalent O(4) atoms. In the third Sr site, Sr(3) is bonded in a distorted square co-planar geometry to four equivalent O(2) atoms. In the fourth Sr site, Sr(4) is bonded in a distorted square co-planar geometry to four equivalent O(3) atoms. There are four inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a distorted square co-planar geometry to four equivalent O(6) atoms. In the second Eu site, Eu(2) is bonded in a distorted square co-planar geometry to four equivalent O(1) atoms. In the third Eu site, Eu(3) is bonded in a q6 geometry to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms. In the fourth Eu site, Eu(4) is bonded in a q6 geometry to four equivalent O(4), four equivalent O(5), and four equivalent O(6) atoms. Nb(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form NbO6 octahedra that share corners with six equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-30°. Bi(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form BiO6 octahedra that share corners with six equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-30°. There are six inequivalent O sites. In the first O site, O(5) is bonded in a 3-coordinate geometry to one Sr(1), one Eu(4), one Nb(1), and one Bi(1) atom. In the second O site, O(6) is bonded in a 3-coordinate geometry to one Eu(1), one Eu(4), one Nb(1), and one Bi(1) atom. In the third O site, O(1) is bonded in a 3-coordinate geometry to one Eu(2), one Eu(3), one Nb(1), and one Bi(1) atom. In the fourth O site, O(2) is bonded in a 3-coordinate geometry to one Sr(3), one Eu(3), one Nb(1), and one Bi(1) atom. In the fifth O site, O(3) is bonded in a 3-coordinate geometry to one Sr(4), one Eu(3), one Nb(1), and one Bi(1) atom. In the sixth O site, O(4) is bonded in a 3-coordinate geometry to one Sr(2), one Eu(4), one Nb(1), and one Bi(1) atom.
SrEuNbBiO6 crystallizes in the orthorhombic P222 space group. There are four inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted square co-planar geometry to four equivalent O(5) atoms. All Sr(1)-O(5) bond lengths are 2.58 Å. In the second Sr site, Sr(2) is bonded in a distorted square co-planar geometry to four equivalent O(4) atoms. All Sr(2)-O(4) bond lengths are 2.58 Å. In the third Sr site, Sr(3) is bonded in a distorted square co-planar geometry to four equivalent O(2) atoms. All Sr(3)-O(2) bond lengths are 2.58 Å. In the fourth Sr site, Sr(4) is bonded in a distorted square co-planar geometry to four equivalent O(3) atoms. All Sr(4)-O(3) bond lengths are 2.58 Å. There are four inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a distorted square co-planar geometry to four equivalent O(6) atoms. All Eu(1)-O(6) bond lengths are 2.53 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 2.55 Å. In the third Eu site, Eu(3) is bonded in a q6 geometry to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms. All Eu(3)-O(1) bond lengths are 3.10 Å. All Eu(3)-O(2) bond lengths are 3.11 Å. All Eu(3)-O(3) bond lengths are 3.09 Å. In the fourth Eu site, Eu(4) is bonded in a q6 geometry to four equivalent O(4), four equivalent O(5), and four equivalent O(6) atoms. All Eu(4)-O(4) bond lengths are 3.10 Å. All Eu(4)-O(5) bond lengths are 3.10 Å. All Eu(4)-O(6) bond lengths are 3.10 Å. Nb(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form NbO6 octahedra that share corners with six equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-30°. The Nb(1)-O(1) bond length is 2.11 Å. The Nb(1)-O(2) bond length is 2.08 Å. The Nb(1)-O(3) bond length is 2.05 Å. The Nb(1)-O(4) bond length is 2.07 Å. The Nb(1)-O(5) bond length is 2.06 Å. The Nb(1)-O(6) bond length is 2.13 Å. Bi(1) is bonded to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom to form BiO6 octahedra that share corners with six equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-30°. The Bi(1)-O(1) bond length is 2.45 Å. The Bi(1)-O(2) bond length is 2.43 Å. The Bi(1)-O(3) bond length is 2.46 Å. The Bi(1)-O(4) bond length is 2.44 Å. The Bi(1)-O(5) bond length is 2.45 Å. The Bi(1)-O(6) bond length is 2.44 Å. There are six inequivalent O sites. In the first O site, O(5) is bonded in a 3-coordinate geometry to one Sr(1), one Eu(4), one Nb(1), and one Bi(1) atom. In the second O site, O(6) is bonded in a 3-coordinate geometry to one Eu(1), one Eu(4), one Nb(1), and one Bi(1) atom. In the third O site, O(1) is bonded in a 3-coordinate geometry to one Eu(2), one Eu(3), one Nb(1), and one Bi(1) atom. In the fourth O site, O(2) is bonded in a 3-coordinate geometry to one Sr(3), one Eu(3), one Nb(1), and one Bi(1) atom. In the fifth O site, O(3) is bonded in a 3-coordinate geometry to one Sr(4), one Eu(3), one Nb(1), and one Bi(1) atom. In the sixth O site, O(4) is bonded in a 3-coordinate geometry to one Sr(2), one Eu(4), one Nb(1), and one Bi(1) atom.