LiSr2V2(Si2O7)2 crystallizes in the monoclinic Pm space group. Li(1) is bonded in a 3-coordinate geometry to one O(9), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 11-coordinate geometry to one O(9), two equivalent O(1), two equivalent O(4), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms. In the second Sr site, Sr(2) is bonded in a 11-coordinate geometry to one O(8), two equivalent O(2), two equivalent O(4), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms. There are two inequivalent V sites. In the first V site, V(1) is bonded in a 5-coordinate geometry to one O(9), two equivalent O(4), and two equivalent O(7) atoms. In the second V site, V(2) is bonded in a 5-coordinate geometry to one O(8), two equivalent O(5), and two equivalent O(6) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(3), one O(4), and one O(7) atom to form corner-sharing SiO4 tetrahedra. In the second Si site, Si(2) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form corner-sharing SiO4 tetrahedra. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to two equivalent Sr(1) and two equivalent Si(2) atoms. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to two equivalent Sr(2) and two equivalent Si(1) atoms. In the third O site, O(3) is bonded in a T-shaped geometry to one Li(1), one Si(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Li(1), one Sr(1), one Sr(2), one V(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Sr(1), one Sr(2), one V(2), and one Si(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one V(2), and one Si(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one V(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Sr(2) and one V(2) atom. In the ninth O site, O(9) is bonded in a distorted T-shaped geometry to one Li(1), one Sr(1), and one V(1) atom.
LiSr2V2(Si2O7)2 crystallizes in the monoclinic Pm space group. Li(1) is bonded in a 3-coordinate geometry to one O(9), two equivalent O(3), and two equivalent O(4) atoms. The Li(1)-O(9) bond length is 1.80 Å. Both Li(1)-O(3) bond lengths are 1.97 Å. Both Li(1)-O(4) bond lengths are 2.53 Å. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 11-coordinate geometry to one O(9), two equivalent O(1), two equivalent O(4), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms. The Sr(1)-O(9) bond length is 2.62 Å. There is one shorter (2.81 Å) and one longer (2.91 Å) Sr(1)-O(1) bond length. Both Sr(1)-O(4) bond lengths are 3.02 Å. Both Sr(1)-O(5) bond lengths are 2.72 Å. Both Sr(1)-O(6) bond lengths are 2.70 Å. Both Sr(1)-O(7) bond lengths are 2.99 Å. In the second Sr site, Sr(2) is bonded in a 11-coordinate geometry to one O(8), two equivalent O(2), two equivalent O(4), two equivalent O(5), two equivalent O(6), and two equivalent O(7) atoms. The Sr(2)-O(8) bond length is 2.83 Å. There is one shorter (2.86 Å) and one longer (2.93 Å) Sr(2)-O(2) bond length. Both Sr(2)-O(4) bond lengths are 2.70 Å. Both Sr(2)-O(5) bond lengths are 2.99 Å. Both Sr(2)-O(6) bond lengths are 2.90 Å. Both Sr(2)-O(7) bond lengths are 2.66 Å. There are two inequivalent V sites. In the first V site, V(1) is bonded in a 5-coordinate geometry to one O(9), two equivalent O(4), and two equivalent O(7) atoms. The V(1)-O(9) bond length is 1.84 Å. Both V(1)-O(4) bond lengths are 2.09 Å. Both V(1)-O(7) bond lengths are 2.04 Å. In the second V site, V(2) is bonded in a 5-coordinate geometry to one O(8), two equivalent O(5), and two equivalent O(6) atoms. The V(2)-O(8) bond length is 1.64 Å. Both V(2)-O(5) bond lengths are 2.02 Å. Both V(2)-O(6) bond lengths are 2.04 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(3), one O(4), and one O(7) atom to form corner-sharing SiO4 tetrahedra. The Si(1)-O(2) bond length is 1.65 Å. The Si(1)-O(3) bond length is 1.64 Å. The Si(1)-O(4) bond length is 1.61 Å. The Si(1)-O(7) bond length is 1.61 Å. In the second Si site, Si(2) is bonded to one O(1), one O(3), one O(5), and one O(6) atom to form corner-sharing SiO4 tetrahedra. The Si(2)-O(1) bond length is 1.70 Å. The Si(2)-O(3) bond length is 1.63 Å. The Si(2)-O(5) bond length is 1.62 Å. The Si(2)-O(6) bond length is 1.62 Å. There are nine inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to two equivalent Sr(1) and two equivalent Si(2) atoms. In the second O site, O(2) is bonded in a distorted bent 150 degrees geometry to two equivalent Sr(2) and two equivalent Si(1) atoms. In the third O site, O(3) is bonded in a T-shaped geometry to one Li(1), one Si(1), and one Si(2) atom. In the fourth O site, O(4) is bonded in a 5-coordinate geometry to one Li(1), one Sr(1), one Sr(2), one V(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 2-coordinate geometry to one Sr(1), one Sr(2), one V(2), and one Si(2) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one V(2), and one Si(2) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one V(1), and one Si(1) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Sr(2) and one V(2) atom. In the ninth O site, O(9) is bonded in a distorted T-shaped geometry to one Li(1), one Sr(1), and one V(1) atom.