SrBi2B4O10 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(6), one O(8), one O(9), and two equivalent O(5) atoms. There are four inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(3), one O(4), and one O(5) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(1), one O(7), and one O(8) atom. In the third B site, B(3) is bonded in a trigonal planar geometry to one O(10), one O(3), and one O(6) atom. In the fourth B site, B(4) is bonded in a tetrahedral geometry to one O(4), one O(6), one O(8), and one O(9) atom. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(5), one O(7), and one O(9) atom. In the second Bi site, Bi(2) is bonded in a 7-coordinate geometry to one O(10), one O(4), one O(9), two equivalent O(1), and two equivalent O(2) atoms. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Sr(1), one B(2), and two equivalent Bi(2) atoms. In the second O site, O(2) is bonded to one Sr(1), one Bi(1), and two equivalent Bi(2) atoms to form distorted edge-sharing OSrBi3 tetrahedra. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Sr(1), one B(1), and one B(3) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one B(1), one B(4), and one Bi(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Sr(1), one B(1), and one Bi(1) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Sr(1), one B(3), and one B(4) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one B(2) and one Bi(1) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(2), and one B(4) atom. In the ninth O site, O(9) is bonded in a 1-coordinate geometry to one Sr(1), one B(4), one Bi(1), and one Bi(2) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Sr(1), one B(3), and one Bi(2) atom.
SrBi2B4O10 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 9-coordinate geometry to one O(1), one O(10), one O(2), one O(3), one O(6), one O(8), one O(9), and two equivalent O(5) atoms. The Sr(1)-O(1) bond length is 2.63 Å. The Sr(1)-O(10) bond length is 2.68 Å. The Sr(1)-O(2) bond length is 2.85 Å. The Sr(1)-O(3) bond length is 2.72 Å. The Sr(1)-O(6) bond length is 2.77 Å. The Sr(1)-O(8) bond length is 2.70 Å. The Sr(1)-O(9) bond length is 2.69 Å. There is one shorter (2.56 Å) and one longer (2.59 Å) Sr(1)-O(5) bond length. There are four inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(3), one O(4), and one O(5) atom. The B(1)-O(3) bond length is 1.41 Å. The B(1)-O(4) bond length is 1.37 Å. The B(1)-O(5) bond length is 1.35 Å. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(1), one O(7), and one O(8) atom. The B(2)-O(1) bond length is 1.40 Å. The B(2)-O(7) bond length is 1.37 Å. The B(2)-O(8) bond length is 1.41 Å. In the third B site, B(3) is bonded in a trigonal planar geometry to one O(10), one O(3), and one O(6) atom. The B(3)-O(10) bond length is 1.36 Å. The B(3)-O(3) bond length is 1.41 Å. The B(3)-O(6) bond length is 1.38 Å. In the fourth B site, B(4) is bonded in a tetrahedral geometry to one O(4), one O(6), one O(8), and one O(9) atom. The B(4)-O(4) bond length is 1.48 Å. The B(4)-O(6) bond length is 1.51 Å. The B(4)-O(8) bond length is 1.50 Å. The B(4)-O(9) bond length is 1.46 Å. There are two inequivalent Bi sites. In the first Bi site, Bi(1) is bonded in a distorted rectangular see-saw-like geometry to one O(2), one O(5), one O(7), and one O(9) atom. The Bi(1)-O(2) bond length is 2.15 Å. The Bi(1)-O(5) bond length is 2.48 Å. The Bi(1)-O(7) bond length is 2.28 Å. The Bi(1)-O(9) bond length is 2.18 Å. In the second Bi site, Bi(2) is bonded in a 7-coordinate geometry to one O(10), one O(4), one O(9), two equivalent O(1), and two equivalent O(2) atoms. The Bi(2)-O(10) bond length is 2.31 Å. The Bi(2)-O(4) bond length is 2.69 Å. The Bi(2)-O(9) bond length is 2.73 Å. There is one shorter (2.33 Å) and one longer (2.67 Å) Bi(2)-O(1) bond length. There is one shorter (2.23 Å) and one longer (2.54 Å) Bi(2)-O(2) bond length. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Sr(1), one B(2), and two equivalent Bi(2) atoms. In the second O site, O(2) is bonded to one Sr(1), one Bi(1), and two equivalent Bi(2) atoms to form distorted edge-sharing OSrBi3 tetrahedra. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Sr(1), one B(1), and one B(3) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one B(1), one B(4), and one Bi(2) atom. In the fifth O site, O(5) is bonded in a distorted single-bond geometry to two equivalent Sr(1), one B(1), and one Bi(1) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Sr(1), one B(3), and one B(4) atom. In the seventh O site, O(7) is bonded in a distorted bent 120 degrees geometry to one B(2) and one Bi(1) atom. In the eighth O site, O(8) is bonded in a distorted bent 120 degrees geometry to one Sr(1), one B(2), and one B(4) atom. In the ninth O site, O(9) is bonded in a 1-coordinate geometry to one Sr(1), one B(4), one Bi(1), and one Bi(2) atom. In the tenth O site, O(10) is bonded in a distorted single-bond geometry to one Sr(1), one B(3), and one Bi(2) atom.