KEuV4O12 crystallizes in the orthorhombic Amm2 space group. K(1) is bonded to two equivalent O(2), two equivalent O(3), four equivalent O(1), and four equivalent O(4) atoms to form distorted corner-sharing KO12 cuboctahedra. Eu(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(5), and four equivalent O(1) atoms. V(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(5) atom. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one K(1), one Eu(1), and one V(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(1), one Eu(1), and two equivalent V(1) atoms. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one K(1) and two equivalent V(1) atoms. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent K(1) and two equivalent V(1) atoms. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Eu(1) and two equivalent V(1) atoms.
KEuV4O12 crystallizes in the orthorhombic Amm2 space group. K(1) is bonded to two equivalent O(2), two equivalent O(3), four equivalent O(1), and four equivalent O(4) atoms to form distorted corner-sharing KO12 cuboctahedra. Both K(1)-O(2) bond lengths are 3.07 Å. Both K(1)-O(3) bond lengths are 2.78 Å. All K(1)-O(1) bond lengths are 2.74 Å. There are two shorter (2.73 Å) and two longer (2.97 Å) K(1)-O(4) bond lengths. Eu(1) is bonded in a 8-coordinate geometry to two equivalent O(2), two equivalent O(5), and four equivalent O(1) atoms. Both Eu(1)-O(2) bond lengths are 2.48 Å. Both Eu(1)-O(5) bond lengths are 2.38 Å. All Eu(1)-O(1) bond lengths are 2.59 Å. V(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(5) atom. The V(1)-O(1) bond length is 1.66 Å. The V(1)-O(2) bond length is 1.93 Å. The V(1)-O(3) bond length is 1.85 Å. The V(1)-O(4) bond length is 1.86 Å. The V(1)-O(5) bond length is 1.91 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one K(1), one Eu(1), and one V(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one K(1), one Eu(1), and two equivalent V(1) atoms. In the third O site, O(3) is bonded in a distorted bent 150 degrees geometry to one K(1) and two equivalent V(1) atoms. In the fourth O site, O(4) is bonded in a 2-coordinate geometry to two equivalent K(1) and two equivalent V(1) atoms. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Eu(1) and two equivalent V(1) atoms.