MgSrB2O5 crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded in a 9-coordinate geometry to one O(1), one O(4), two equivalent O(3), two equivalent O(5), and three equivalent O(2) atoms. Mg(1) is bonded to one O(2), one O(3), one O(5), and two equivalent O(1) atoms to form edge-sharing MgO5 square pyramids. There are two inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(4) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(3), one O(4), and one O(5) atom. There are five inequivalent O sites. In the first O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Mg(1), and one B(2) atom. In the second O site, O(1) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Mg(1), and one B(1) atom. In the third O site, O(2) is bonded in a 2-coordinate geometry to three equivalent Sr(1), one Mg(1), and one B(1) atom. In the fourth O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Mg(1), and one B(2) atom. In the fifth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(1), and one B(2) atom.
MgSrB2O5 crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded in a 9-coordinate geometry to one O(1), one O(4), two equivalent O(3), two equivalent O(5), and three equivalent O(2) atoms. The Sr(1)-O(1) bond length is 2.67 Å. The Sr(1)-O(4) bond length is 2.57 Å. There is one shorter (2.55 Å) and one longer (2.62 Å) Sr(1)-O(3) bond length. There is one shorter (2.59 Å) and one longer (2.71 Å) Sr(1)-O(5) bond length. There are a spread of Sr(1)-O(2) bond distances ranging from 2.85-3.00 Å. Mg(1) is bonded to one O(2), one O(3), one O(5), and two equivalent O(1) atoms to form edge-sharing MgO5 square pyramids. The Mg(1)-O(2) bond length is 2.05 Å. The Mg(1)-O(3) bond length is 2.01 Å. The Mg(1)-O(5) bond length is 2.01 Å. There is one shorter (2.07 Å) and one longer (2.08 Å) Mg(1)-O(1) bond length. There are two inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(4) atom. The B(1)-O(1) bond length is 1.38 Å. The B(1)-O(2) bond length is 1.36 Å. The B(1)-O(4) bond length is 1.44 Å. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(3), one O(4), and one O(5) atom. The B(2)-O(3) bond length is 1.37 Å. The B(2)-O(4) bond length is 1.43 Å. The B(2)-O(5) bond length is 1.37 Å. There are five inequivalent O sites. In the first O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Mg(1), and one B(2) atom. In the second O site, O(1) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Mg(1), and one B(1) atom. In the third O site, O(2) is bonded in a 2-coordinate geometry to three equivalent Sr(1), one Mg(1), and one B(1) atom. In the fourth O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Mg(1), and one B(2) atom. In the fifth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(1), and one B(2) atom.