SrBeSm2O5 crystallizes in the orthorhombic Pna2_1 space group. Sr(1) is bonded in a 9-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. Be(1) is bonded in a tetrahedral geometry to one O(1), one O(3), one O(4), and one O(5) atom. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms. In the second Sm site, Sm(2) is bonded in a 9-coordinate geometry to one O(5), two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Sr(1), one Be(1), one Sm(1), and two equivalent Sm(2) atoms. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sm(1), and two equivalent Sm(2) atoms. In the third O site, O(3) is bonded in a 6-coordinate geometry to two equivalent Sr(1), one Be(1), one Sm(1), and two equivalent Sm(2) atoms. In the fourth O site, O(4) is bonded in a 1-coordinate geometry to one Sr(1), one Be(1), two equivalent Sm(1), and two equivalent Sm(2) atoms. In the fifth O site, O(5) is bonded in a 1-coordinate geometry to two equivalent Sr(1), one Be(1), one Sm(2), and two equivalent Sm(1) atoms.
SrBeSm2O5 crystallizes in the orthorhombic Pna2_1 space group. Sr(1) is bonded in a 9-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(5) atoms. The Sr(1)-O(4) bond length is 2.86 Å. There is one shorter (2.52 Å) and one longer (2.53 Å) Sr(1)-O(1) bond length. There is one shorter (2.54 Å) and one longer (2.58 Å) Sr(1)-O(2) bond length. There is one shorter (2.54 Å) and one longer (2.59 Å) Sr(1)-O(3) bond length. There is one shorter (2.58 Å) and one longer (2.75 Å) Sr(1)-O(5) bond length. Be(1) is bonded in a tetrahedral geometry to one O(1), one O(3), one O(4), and one O(5) atom. The Be(1)-O(1) bond length is 1.65 Å. The Be(1)-O(3) bond length is 1.71 Å. The Be(1)-O(4) bond length is 1.63 Å. The Be(1)-O(5) bond length is 1.61 Å. There are two inequivalent Sm sites. In the first Sm site, Sm(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), two equivalent O(2), two equivalent O(4), and two equivalent O(5) atoms. The Sm(1)-O(1) bond length is 2.54 Å. The Sm(1)-O(3) bond length is 2.45 Å. There is one shorter (2.36 Å) and one longer (2.93 Å) Sm(1)-O(2) bond length. There is one shorter (2.36 Å) and one longer (2.45 Å) Sm(1)-O(4) bond length. There is one shorter (2.32 Å) and one longer (2.52 Å) Sm(1)-O(5) bond length. In the second Sm site, Sm(2) is bonded in a 9-coordinate geometry to one O(5), two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. The Sm(2)-O(5) bond length is 2.74 Å. There is one shorter (2.46 Å) and one longer (2.55 Å) Sm(2)-O(1) bond length. There is one shorter (2.43 Å) and one longer (2.70 Å) Sm(2)-O(2) bond length. There is one shorter (2.56 Å) and one longer (2.60 Å) Sm(2)-O(3) bond length. There is one shorter (2.56 Å) and one longer (2.84 Å) Sm(2)-O(4) bond length. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to two equivalent Sr(1), one Be(1), one Sm(1), and two equivalent Sm(2) atoms. In the second O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Sm(1), and two equivalent Sm(2) atoms. In the third O site, O(3) is bonded in a 6-coordinate geometry to two equivalent Sr(1), one Be(1), one Sm(1), and two equivalent Sm(2) atoms. In the fourth O site, O(4) is bonded in a 1-coordinate geometry to one Sr(1), one Be(1), two equivalent Sm(1), and two equivalent Sm(2) atoms. In the fifth O site, O(5) is bonded in a 1-coordinate geometry to two equivalent Sr(1), one Be(1), one Sm(2), and two equivalent Sm(1) atoms.