Be(GaO2)2 crystallizes in the monoclinic P2_1/m space group. Be(1) is bonded to one O(1), one O(3), and two equivalent O(4) atoms to form BeO4 tetrahedra that share corners with two equivalent Be(1)O4 tetrahedra, corners with three equivalent Ga(1)O4 tetrahedra, and corners with three equivalent Ga(2)O4 tetrahedra. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(1), one O(4), and two equivalent O(2) atoms to form GaO4 tetrahedra that share corners with two equivalent Ga(1)O4 tetrahedra, corners with three equivalent Be(1)O4 tetrahedra, and corners with three equivalent Ga(2)O4 tetrahedra. In the second Ga site, Ga(2) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form GaO4 tetrahedra that share corners with two equivalent Ga(2)O4 tetrahedra, corners with three equivalent Be(1)O4 tetrahedra, and corners with three equivalent Ga(1)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Be(1), one Ga(1), and one Ga(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Ga(2) and two equivalent Ga(1) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one Be(1) and two equivalent Ga(2) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to two equivalent Be(1) and one Ga(1) atom.
Be(GaO2)2 crystallizes in the monoclinic P2_1/m space group. Be(1) is bonded to one O(1), one O(3), and two equivalent O(4) atoms to form BeO4 tetrahedra that share corners with two equivalent Be(1)O4 tetrahedra, corners with three equivalent Ga(1)O4 tetrahedra, and corners with three equivalent Ga(2)O4 tetrahedra. The Be(1)-O(1) bond length is 1.65 Å. The Be(1)-O(3) bond length is 1.67 Å. Both Be(1)-O(4) bond lengths are 1.71 Å. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(1), one O(4), and two equivalent O(2) atoms to form GaO4 tetrahedra that share corners with two equivalent Ga(1)O4 tetrahedra, corners with three equivalent Be(1)O4 tetrahedra, and corners with three equivalent Ga(2)O4 tetrahedra. The Ga(1)-O(1) bond length is 1.85 Å. The Ga(1)-O(4) bond length is 1.82 Å. Both Ga(1)-O(2) bond lengths are 1.88 Å. In the second Ga site, Ga(2) is bonded to one O(1), one O(2), and two equivalent O(3) atoms to form GaO4 tetrahedra that share corners with two equivalent Ga(2)O4 tetrahedra, corners with three equivalent Be(1)O4 tetrahedra, and corners with three equivalent Ga(1)O4 tetrahedra. The Ga(2)-O(1) bond length is 1.85 Å. The Ga(2)-O(2) bond length is 1.90 Å. Both Ga(2)-O(3) bond lengths are 1.84 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Be(1), one Ga(1), and one Ga(2) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Ga(2) and two equivalent Ga(1) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one Be(1) and two equivalent Ga(2) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to two equivalent Be(1) and one Ga(1) atom.