BeEu3O5 crystallizes in the orthorhombic Pnma space group. Be(1) is bonded in a tetrahedral geometry to one O(1), one O(4), and two equivalent O(2) atoms. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(3), and four equivalent O(2) atoms. In the second Eu site, Eu(2) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(4), and three equivalent O(2) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Be(1), one Eu(1), and four equivalent Eu(2) atoms. In the second O site, O(2) is bonded in a 1-coordinate geometry to one Be(1), two equivalent Eu(1), and three equivalent Eu(2) atoms. In the third O site, O(3) is bonded in a 6-coordinate geometry to two equivalent Eu(1) and four equivalent Eu(2) atoms. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Be(1), one Eu(1), and four equivalent Eu(2) atoms.
BeEu3O5 crystallizes in the orthorhombic Pnma space group. Be(1) is bonded in a tetrahedral geometry to one O(1), one O(4), and two equivalent O(2) atoms. The Be(1)-O(1) bond length is 1.67 Å. The Be(1)-O(4) bond length is 1.64 Å. Both Be(1)-O(2) bond lengths are 1.60 Å. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(3), and four equivalent O(2) atoms. The Eu(1)-O(1) bond length is 2.42 Å. The Eu(1)-O(4) bond length is 2.53 Å. There is one shorter (2.35 Å) and one longer (2.90 Å) Eu(1)-O(3) bond length. There are two shorter (2.34 Å) and two longer (2.48 Å) Eu(1)-O(2) bond lengths. In the second Eu site, Eu(2) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(3), two equivalent O(4), and three equivalent O(2) atoms. There is one shorter (2.51 Å) and one longer (2.60 Å) Eu(2)-O(1) bond length. There is one shorter (2.49 Å) and one longer (2.61 Å) Eu(2)-O(3) bond length. There is one shorter (2.47 Å) and one longer (2.50 Å) Eu(2)-O(4) bond length. There are a spread of Eu(2)-O(2) bond distances ranging from 2.57-2.75 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to one Be(1), one Eu(1), and four equivalent Eu(2) atoms. In the second O site, O(2) is bonded in a 1-coordinate geometry to one Be(1), two equivalent Eu(1), and three equivalent Eu(2) atoms. In the third O site, O(3) is bonded in a 6-coordinate geometry to two equivalent Eu(1) and four equivalent Eu(2) atoms. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to one Be(1), one Eu(1), and four equivalent Eu(2) atoms.