SrBe2(BO3)2 crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(4), two equivalent O(1), two equivalent O(5), and two equivalent O(6) atoms. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to one O(1), one O(5), and two equivalent O(2) atoms to form corner-sharing BeO4 tetrahedra. In the second Be site, Be(2) is bonded to one O(4), one O(6), and two equivalent O(3) atoms to form edge-sharing BeO4 tetrahedra. 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(3), and one O(4) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(2), one O(5), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to two equivalent Sr(1), one Be(1), and one B(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Sr(1), two equivalent Be(1), and one B(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sr(1), two equivalent Be(2), and one B(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one Be(2), and one B(1) atom. In the fifth O site, O(5) is bonded in a distorted water-like geometry to two equivalent Sr(1), one Be(1), and one B(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to two equivalent Sr(1), one Be(2), and one B(2) atom.
SrBe2(BO3)2 crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded in a 9-coordinate geometry to one O(2), one O(3), one O(4), two equivalent O(1), two equivalent O(5), and two equivalent O(6) atoms. The Sr(1)-O(2) bond length is 3.03 Å. The Sr(1)-O(3) bond length is 3.02 Å. The Sr(1)-O(4) bond length is 2.50 Å. There is one shorter (2.60 Å) and one longer (2.87 Å) Sr(1)-O(1) bond length. There is one shorter (2.59 Å) and one longer (2.71 Å) Sr(1)-O(5) bond length. There is one shorter (2.69 Å) and one longer (2.81 Å) Sr(1)-O(6) bond length. There are two inequivalent Be sites. In the first Be site, Be(1) is bonded to one O(1), one O(5), and two equivalent O(2) atoms to form corner-sharing BeO4 tetrahedra. The Be(1)-O(1) bond length is 1.61 Å. The Be(1)-O(5) bond length is 1.63 Å. There is one shorter (1.66 Å) and one longer (1.69 Å) Be(1)-O(2) bond length. In the second Be site, Be(2) is bonded to one O(4), one O(6), and two equivalent O(3) atoms to form edge-sharing BeO4 tetrahedra. The Be(2)-O(4) bond length is 1.61 Å. The Be(2)-O(6) bond length is 1.61 Å. There is one shorter (1.66 Å) and one longer (1.70 Å) Be(2)-O(3) 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(3), and one O(4) atom. The B(1)-O(1) bond length is 1.38 Å. The B(1)-O(3) bond length is 1.40 Å. The B(1)-O(4) bond length is 1.37 Å. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(2), one O(5), and one O(6) atom. The B(2)-O(2) bond length is 1.40 Å. The B(2)-O(5) bond length is 1.39 Å. The B(2)-O(6) bond length is 1.37 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to two equivalent Sr(1), one Be(1), and one B(1) atom. In the second O site, O(2) is bonded in a trigonal planar geometry to one Sr(1), two equivalent Be(1), and one B(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Sr(1), two equivalent Be(2), and one B(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one Be(2), and one B(1) atom. In the fifth O site, O(5) is bonded in a distorted water-like geometry to two equivalent Sr(1), one Be(1), and one B(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to two equivalent Sr(1), one Be(2), and one B(2) atom.