Rb2Be2O3 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 4-coordinate geometry to four equivalent O(2) atoms. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to three equivalent O(1) and four equivalent O(2) atoms. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(2) atoms. In the second Be site, Be(2) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to three equivalent Rb(2), one Be(1), and one Be(2) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to two equivalent Rb(1), two equivalent Rb(2), one Be(1), and one Be(2) atom.
Rb2Be2O3 crystallizes in the orthorhombic Pnma space group. There are two inequivalent Rb sites. In the first Rb site, Rb(1) is bonded in a 4-coordinate geometry to four equivalent O(2) atoms. There are two shorter (2.84 Å) and two longer (2.93 Å) Rb(1)-O(2) bond lengths. In the second Rb site, Rb(2) is bonded in a 7-coordinate geometry to three equivalent O(1) and four equivalent O(2) atoms. There are two shorter (2.79 Å) and one longer (3.09 Å) Rb(2)-O(1) bond length. There are two shorter (2.93 Å) and two longer (3.12 Å) Rb(2)-O(2) bond lengths. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(2) atoms. The Be(1)-O(1) bond length is 1.55 Å. Both Be(1)-O(2) bond lengths are 1.55 Å. In the second Be site, Be(2) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(2) atoms. The Be(2)-O(1) bond length is 1.55 Å. Both Be(2)-O(2) bond lengths are 1.55 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to three equivalent Rb(2), one Be(1), and one Be(2) atom. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to two equivalent Rb(1), two equivalent Rb(2), one Be(1), and one Be(2) atom.