Li2BSiSbO7 crystallizes in the monoclinic P2_1/m space group. Li(1) is bonded in a 3-coordinate geometry to one O(1), one O(2), one O(3), and one O(4) atom. B(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. Si(1) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with four equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-49°. Sb(1) is bonded to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms to form SbO6 octahedra that share corners with four equivalent Si(1)O4 tetrahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Li(1) and one B(1) atom. In the second O site, O(2) is bonded in a distorted trigonal pyramidal geometry to two equivalent Li(1), one B(1), and one Sb(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Li(1), one B(1), and one Sb(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one Si(1), and one Sb(1) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Si(1) and one Sb(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Si(1) and one Sb(1) atom.
Li2BSiSbO7 crystallizes in the monoclinic P2_1/m space group. Li(1) is bonded in a 3-coordinate geometry to one O(1), one O(2), one O(3), and one O(4) atom. The Li(1)-O(1) bond length is 1.93 Å. The Li(1)-O(2) bond length is 2.09 Å. The Li(1)-O(3) bond length is 2.12 Å. The Li(1)-O(4) bond length is 2.56 Å. B(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. The B(1)-O(1) bond length is 1.32 Å. The B(1)-O(2) bond length is 1.44 Å. The B(1)-O(3) bond length is 1.46 Å. Si(1) is bonded to one O(5), one O(6), and two equivalent O(4) atoms to form SiO4 tetrahedra that share corners with four equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 42-49°. The Si(1)-O(5) bond length is 1.64 Å. The Si(1)-O(6) bond length is 1.66 Å. Both Si(1)-O(4) bond lengths are 1.63 Å. Sb(1) is bonded to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms to form SbO6 octahedra that share corners with four equivalent Si(1)O4 tetrahedra. The Sb(1)-O(2) bond length is 2.05 Å. The Sb(1)-O(3) bond length is 2.05 Å. The Sb(1)-O(5) bond length is 1.99 Å. The Sb(1)-O(6) bond length is 1.98 Å. Both Sb(1)-O(4) bond lengths are 1.97 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Li(1) and one B(1) atom. In the second O site, O(2) is bonded in a distorted trigonal pyramidal geometry to two equivalent Li(1), one B(1), and one Sb(1) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Li(1), one B(1), and one Sb(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one Si(1), and one Sb(1) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Si(1) and one Sb(1) atom. In the sixth O site, O(6) is bonded in a distorted bent 120 degrees geometry to one Si(1) and one Sb(1) atom.