EuNbMnSnO6 crystallizes in the triclinic P-1 space group. Eu(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), one O(5), one O(6), two equivalent O(2), and two equivalent O(3) atoms. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form NbO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra and corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-28°. In the second Nb site, Nb(2) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form NbO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with four equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-29°. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra and corners with four equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-29°. In the second Mn site, Mn(2) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms to form MnO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra and corners with four equivalent Nb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-29°. Sn(1) is bonded in a 3-coordinate geometry to one O(1), one O(4), and one O(5) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Eu(1), one Nb(1), one Mn(1), and one Sn(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Eu(1), one Nb(2), and one Mn(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Eu(1), one Nb(1), and one Mn(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Eu(1), one Nb(2), one Mn(2), and one Sn(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Eu(1), one Nb(1), one Mn(2), and one Sn(1) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Eu(1), one Nb(2), and one Mn(1) atom.
EuNbMnSnO6 crystallizes in the triclinic P-1 space group. Eu(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), one O(5), one O(6), two equivalent O(2), and two equivalent O(3) atoms. The Eu(1)-O(1) bond length is 2.79 Å. The Eu(1)-O(4) bond length is 2.80 Å. The Eu(1)-O(5) bond length is 2.67 Å. The Eu(1)-O(6) bond length is 2.43 Å. There is one shorter (2.44 Å) and one longer (2.75 Å) Eu(1)-O(2) bond length. There is one shorter (2.42 Å) and one longer (2.77 Å) Eu(1)-O(3) bond length. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(5) atoms to form NbO6 octahedra that share corners with two equivalent Mn(2)O6 octahedra and corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-28°. Both Nb(1)-O(1) bond lengths are 2.05 Å. Both Nb(1)-O(3) bond lengths are 2.02 Å. Both Nb(1)-O(5) bond lengths are 2.06 Å. In the second Nb site, Nb(2) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(6) atoms to form NbO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with four equivalent Mn(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-29°. Both Nb(2)-O(2) bond lengths are 2.03 Å. Both Nb(2)-O(4) bond lengths are 2.08 Å. Both Nb(2)-O(6) bond lengths are 2.03 Å. There are two inequivalent Mn sites. In the first Mn site, Mn(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(6) atoms to form MnO6 octahedra that share corners with two equivalent Nb(2)O6 octahedra and corners with four equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-29°. Both Mn(1)-O(1) bond lengths are 2.09 Å. Both Mn(1)-O(3) bond lengths are 2.33 Å. Both Mn(1)-O(6) bond lengths are 2.05 Å. In the second Mn site, Mn(2) is bonded to two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms to form MnO6 octahedra that share corners with two equivalent Nb(1)O6 octahedra and corners with four equivalent Nb(2)O6 octahedra. The corner-sharing octahedral tilt angles range from 26-29°. Both Mn(2)-O(2) bond lengths are 2.32 Å. Both Mn(2)-O(4) bond lengths are 2.06 Å. Both Mn(2)-O(5) bond lengths are 2.01 Å. Sn(1) is bonded in a 3-coordinate geometry to one O(1), one O(4), and one O(5) atom. The Sn(1)-O(1) bond length is 2.33 Å. The Sn(1)-O(4) bond length is 2.33 Å. The Sn(1)-O(5) bond length is 2.57 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Eu(1), one Nb(1), one Mn(1), and one Sn(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Eu(1), one Nb(2), and one Mn(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Eu(1), one Nb(1), and one Mn(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Eu(1), one Nb(2), one Mn(2), and one Sn(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Eu(1), one Nb(1), one Mn(2), and one Sn(1) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Eu(1), one Nb(2), and one Mn(1) atom.