BeEu2NdO5 crystallizes in the orthorhombic Pnma space group. Be(1) is bonded in a tetrahedral geometry to one O(3), one O(4), and two equivalent O(1) atoms. Eu(1) is bonded in a 9-coordinate geometry to two equivalent O(2), two equivalent O(3), two equivalent O(4), and three equivalent O(1) atoms. Nd(1) is bonded in a 8-coordinate geometry to one O(3), one O(4), two equivalent O(2), and four equivalent O(1) atoms. There are four inequivalent O sites. In the first O site, O(4) is bonded in a distorted single-bond geometry to one Be(1), four equivalent Eu(1), and one Nd(1) atom. In the second O site, O(1) is bonded in a 1-coordinate geometry to one Be(1), three equivalent Eu(1), and two equivalent Nd(1) atoms. In the third O site, O(2) is bonded to four equivalent Eu(1) and two equivalent Nd(1) atoms to form distorted corner-sharing ONd2Eu4 octahedra. The corner-sharing octahedral tilt angles range from 34-44°. In the fourth O site, O(3) is bonded in a distorted single-bond geometry to one Be(1), four equivalent Eu(1), and one Nd(1) atom.
BeEu2NdO5 crystallizes in the orthorhombic Pnma space group. Be(1) is bonded in a tetrahedral geometry to one O(3), one O(4), and two equivalent O(1) atoms. The Be(1)-O(3) bond length is 1.64 Å. The Be(1)-O(4) bond length is 1.69 Å. Both Be(1)-O(1) bond lengths are 1.62 Å. Eu(1) is bonded in a 9-coordinate geometry to two equivalent O(2), two equivalent O(3), two equivalent O(4), and three equivalent O(1) atoms. There is one shorter (2.51 Å) and one longer (2.65 Å) Eu(1)-O(2) bond length. There is one shorter (2.49 Å) and one longer (2.56 Å) Eu(1)-O(3) bond length. There is one shorter (2.55 Å) and one longer (2.61 Å) Eu(1)-O(4) bond length. There are a spread of Eu(1)-O(1) bond distances ranging from 2.60-2.81 Å. Nd(1) is bonded in a 8-coordinate geometry to one O(3), one O(4), two equivalent O(2), and four equivalent O(1) atoms. The Nd(1)-O(3) bond length is 2.54 Å. The Nd(1)-O(4) bond length is 2.47 Å. There is one shorter (2.41 Å) and one longer (2.88 Å) Nd(1)-O(2) bond length. There are two shorter (2.37 Å) and two longer (2.50 Å) Nd(1)-O(1) bond lengths. There are four inequivalent O sites. In the first O site, O(4) is bonded in a distorted single-bond geometry to one Be(1), four equivalent Eu(1), and one Nd(1) atom. In the second O site, O(1) is bonded in a 1-coordinate geometry to one Be(1), three equivalent Eu(1), and two equivalent Nd(1) atoms. In the third O site, O(2) is bonded to four equivalent Eu(1) and two equivalent Nd(1) atoms to form distorted corner-sharing ONd2Eu4 octahedra. The corner-sharing octahedral tilt angles range from 34-44°. In the fourth O site, O(3) is bonded in a distorted single-bond geometry to one Be(1), four equivalent Eu(1), and one Nd(1) atom.