Ba2Mn(BO2)6 crystallizes in the trigonal R-3 space group. Ba(1) is bonded in a 9-coordinate geometry to three equivalent O(1) and six equivalent O(2) atoms. Mn(1) is bonded in an octahedral geometry to six equivalent O(2) atoms. B(1) is bonded in a trigonal planar geometry to one O(2) and two equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(2) is bonded in a 1-coordinate geometry to two equivalent Ba(1), one Mn(1), and one B(1) atom. In the second O site, O(1) is bonded in a bent 120 degrees geometry to one Ba(1) and two equivalent B(1) atoms.
Ba2Mn(BO2)6 crystallizes in the trigonal R-3 space group. Ba(1) is bonded in a 9-coordinate geometry to three equivalent O(1) and six equivalent O(2) atoms. All Ba(1)-O(1) bond lengths are 2.97 Å. There are three shorter (2.79 Å) and three longer (2.91 Å) Ba(1)-O(2) bond lengths. Mn(1) is bonded in an octahedral geometry to six equivalent O(2) atoms. All Mn(1)-O(2) bond lengths are 2.25 Å. B(1) is bonded in a trigonal planar geometry to one O(2) and two equivalent O(1) atoms. The B(1)-O(2) bond length is 1.33 Å. There is one shorter (1.41 Å) and one longer (1.42 Å) B(1)-O(1) bond length. There are two inequivalent O sites. In the first O site, O(2) is bonded in a 1-coordinate geometry to two equivalent Ba(1), one Mn(1), and one B(1) atom. In the second O site, O(1) is bonded in a bent 120 degrees geometry to one Ba(1) and two equivalent B(1) atoms.