BaBe2(BO2)2 crystallizes in the orthorhombic Fddd space group. Ba(1) is bonded in a 4-coordinate geometry to four equivalent O(1) atoms. Be(1) is bonded in a 4-coordinate geometry to one B(1), one O(1), and two equivalent O(2) atoms. B(1) is bonded in a distorted bent 120 degrees geometry to one Be(1), one O(1), and one O(2) atom. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Ba(1), one Be(1), and one B(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to two equivalent Be(1) and one B(1) atom.
BaBe2(BO2)2 crystallizes in the orthorhombic Fddd space group. Ba(1) is bonded in a 4-coordinate geometry to four equivalent O(1) atoms. There are two shorter (2.70 Å) and two longer (2.78 Å) Ba(1)-O(1) bond lengths. Be(1) is bonded in a 4-coordinate geometry to one B(1), one O(1), and two equivalent O(2) atoms. The Be(1)-B(1) bond length is 2.13 Å. The Be(1)-O(1) bond length is 1.67 Å. There is one shorter (1.65 Å) and one longer (1.69 Å) Be(1)-O(2) bond length. B(1) is bonded in a distorted bent 120 degrees geometry to one Be(1), one O(1), and one O(2) atom. The B(1)-O(1) bond length is 1.39 Å. The B(1)-O(2) bond length is 1.39 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent Ba(1), one Be(1), and one B(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to two equivalent Be(1) and one B(1) atom.