Na3SrB5O10 crystallizes in the triclinic P-1 space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one O(10), one O(2), one O(5), and two equivalent O(4) atoms. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(3), one O(6), and two equivalent O(9) atoms. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(3), one O(6), and two equivalent O(8) atoms. Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(2), one O(5), one O(7), one O(8), and two equivalent O(3) atoms. There are five inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(10), one O(4), and one O(7) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(1), one O(3), and one O(9) atom. In the third B site, B(3) is bonded in a trigonal planar geometry to one O(2), one O(6), and one O(7) atom. In the fourth B site, B(4) is bonded in a trigonal planar geometry to one O(5), one O(8), and one O(9) atom. In the fifth B site, B(5) is bonded in a tetrahedral geometry to one O(1), one O(4), one O(5), and one O(6) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Na(3), one Sr(1), one B(2), and one B(5) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Sr(1), and one B(3) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Na(2), one Na(3), two equivalent Sr(1), and one B(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Na(1), one B(1), and one B(5) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Na(1), one Sr(1), one B(4), and one B(5) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one Na(2), one Na(3), one B(3), and one B(5) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(1), and one B(3) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to two equivalent Na(3), one Sr(1), and one B(4) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to two equivalent Na(2), one B(2), and one B(4) atom. In the tenth O site, O(10) is bonded in a 1-coordinate geometry to one Na(1), one Na(2), one Na(3), one Sr(1), and one B(1) atom.
Na3SrB5O10 crystallizes in the triclinic P-1 space group. There are three inequivalent Na sites. In the first Na site, Na(1) is bonded in a 5-coordinate geometry to one O(10), one O(2), one O(5), and two equivalent O(4) atoms. The Na(1)-O(10) bond length is 2.70 Å. The Na(1)-O(2) bond length is 2.28 Å. The Na(1)-O(5) bond length is 2.43 Å. There is one shorter (2.35 Å) and one longer (2.70 Å) Na(1)-O(4) bond length. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(10), one O(2), one O(3), one O(6), and two equivalent O(9) atoms. The Na(2)-O(10) bond length is 2.42 Å. The Na(2)-O(2) bond length is 2.74 Å. The Na(2)-O(3) bond length is 2.59 Å. The Na(2)-O(6) bond length is 2.37 Å. There is one shorter (2.46 Å) and one longer (2.60 Å) Na(2)-O(9) bond length. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to one O(1), one O(10), one O(3), one O(6), and two equivalent O(8) atoms. The Na(3)-O(1) bond length is 2.47 Å. The Na(3)-O(10) bond length is 2.50 Å. The Na(3)-O(3) bond length is 2.50 Å. The Na(3)-O(6) bond length is 2.76 Å. There is one shorter (2.28 Å) and one longer (2.33 Å) Na(3)-O(8) bond length. Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(10), one O(2), one O(5), one O(7), one O(8), and two equivalent O(3) atoms. The Sr(1)-O(1) bond length is 2.62 Å. The Sr(1)-O(10) bond length is 2.72 Å. The Sr(1)-O(2) bond length is 2.50 Å. The Sr(1)-O(5) bond length is 2.85 Å. The Sr(1)-O(7) bond length is 2.66 Å. The Sr(1)-O(8) bond length is 2.48 Å. There is one shorter (2.67 Å) and one longer (2.71 Å) Sr(1)-O(3) bond length. There are five inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(10), one O(4), and one O(7) atom. The B(1)-O(10) bond length is 1.34 Å. The B(1)-O(4) bond length is 1.40 Å. The B(1)-O(7) bond length is 1.43 Å. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(1), one O(3), and one O(9) atom. The B(2)-O(1) bond length is 1.40 Å. The B(2)-O(3) bond length is 1.34 Å. The B(2)-O(9) bond length is 1.42 Å. In the third B site, B(3) is bonded in a trigonal planar geometry to one O(2), one O(6), and one O(7) atom. The B(3)-O(2) bond length is 1.34 Å. The B(3)-O(6) bond length is 1.40 Å. The B(3)-O(7) bond length is 1.43 Å. In the fourth B site, B(4) is bonded in a trigonal planar geometry to one O(5), one O(8), and one O(9) atom. The B(4)-O(5) bond length is 1.41 Å. The B(4)-O(8) bond length is 1.33 Å. The B(4)-O(9) bond length is 1.42 Å. In the fifth B site, B(5) is bonded in a tetrahedral geometry to one O(1), one O(4), one O(5), and one O(6) atom. The B(5)-O(1) bond length is 1.50 Å. The B(5)-O(4) bond length is 1.48 Å. The B(5)-O(5) bond length is 1.49 Å. The B(5)-O(6) bond length is 1.47 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Na(3), one Sr(1), one B(2), and one B(5) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Na(1), one Na(2), one Sr(1), and one B(3) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Na(2), one Na(3), two equivalent Sr(1), and one B(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Na(1), one B(1), and one B(5) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Na(1), one Sr(1), one B(4), and one B(5) atom. In the sixth O site, O(6) is bonded in a 2-coordinate geometry to one Na(2), one Na(3), one B(3), and one B(5) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(1), and one B(3) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to two equivalent Na(3), one Sr(1), and one B(4) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to two equivalent Na(2), one B(2), and one B(4) atom. In the tenth O site, O(10) is bonded in a 1-coordinate geometry to one Na(1), one Na(2), one Na(3), one Sr(1), and one B(1) atom.