Ca2BeYO5 crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(4), and three equivalent O(3) atoms. Be(1) is bonded in a tetrahedral geometry to one O(1), one O(4), and two equivalent O(3) atoms. Y(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(2), and four equivalent O(3) atoms. There are four inequivalent O sites. In the first O site, O(4) is bonded in a distorted single-bond geometry to four equivalent Ca(1), one Be(1), and one Y(1) atom. In the second O site, O(1) is bonded in a 6-coordinate geometry to four equivalent Ca(1), one Be(1), and one Y(1) atom. In the third O site, O(2) is bonded to four equivalent Ca(1) and two equivalent Y(1) atoms to form distorted corner-sharing OCa4Y2 octahedra. The corner-sharing octahedral tilt angles range from 34-45°. In the fourth O site, O(3) is bonded in a 1-coordinate geometry to three equivalent Ca(1), one Be(1), and two equivalent Y(1) atoms.
Ca2BeYO5 crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded in a 9-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(4), and three equivalent O(3) atoms. There is one shorter (2.45 Å) and one longer (2.58 Å) Ca(1)-O(1) bond length. Both Ca(1)-O(2) bond lengths are 2.51 Å. There is one shorter (2.46 Å) and one longer (2.49 Å) Ca(1)-O(4) bond length. There are a spread of Ca(1)-O(3) bond distances ranging from 2.49-2.81 Å. Be(1) is bonded in a tetrahedral geometry to one O(1), one O(4), and two equivalent O(3) atoms. The Be(1)-O(1) bond length is 1.64 Å. The Be(1)-O(4) bond length is 1.65 Å. Both Be(1)-O(3) bond lengths are 1.61 Å. Y(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), two equivalent O(2), and four equivalent O(3) atoms. The Y(1)-O(1) bond length is 2.30 Å. The Y(1)-O(4) bond length is 2.40 Å. There is one shorter (2.37 Å) and one longer (2.72 Å) Y(1)-O(2) bond length. There are two shorter (2.29 Å) and two longer (2.42 Å) Y(1)-O(3) bond lengths. There are four inequivalent O sites. In the first O site, O(4) is bonded in a distorted single-bond geometry to four equivalent Ca(1), one Be(1), and one Y(1) atom. In the second O site, O(1) is bonded in a 6-coordinate geometry to four equivalent Ca(1), one Be(1), and one Y(1) atom. In the third O site, O(2) is bonded to four equivalent Ca(1) and two equivalent Y(1) atoms to form distorted corner-sharing OCa4Y2 octahedra. The corner-sharing octahedral tilt angles range from 34-45°. In the fourth O site, O(3) is bonded in a 1-coordinate geometry to three equivalent Ca(1), one Be(1), and two equivalent Y(1) atoms.