LiSr2V2(Si2O7)2 crystallizes in the orthorhombic Amm2 space group. Li(1) is bonded in a distorted rectangular see-saw-like geometry to four equivalent O(4) atoms. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 1-coordinate geometry to one O(7) and four equivalent O(5) atoms. In the second Sr site, Sr(2) is bonded in a 10-coordinate geometry to two equivalent O(2), four equivalent O(4), and four equivalent O(5) atoms. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(7) and four equivalent O(4) atoms to form distorted VO5 trigonal bipyramids that share corners with four equivalent Si(1)O4 tetrahedra. In the second V site, V(2) is bonded in a 5-coordinate geometry to one O(6) and four equivalent O(5) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(3), and two equivalent O(4) atoms to form SiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and corners with two equivalent V(1)O5 trigonal bipyramids. In the second Si site, Si(2) is bonded to one O(1), one O(3), and two equivalent O(5) atoms to form corner-sharing SiO4 tetrahedra. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to 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 linear geometry to one Si(1) and one Si(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Li(1), one Sr(2), one V(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 4-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 single-bond geometry to one V(2) atom. In the seventh O site, O(7) is bonded in a linear geometry to one Sr(1) and one V(1) atom.
LiSr2V2(Si2O7)2 crystallizes in the orthorhombic Amm2 space group. Li(1) is bonded in a distorted rectangular see-saw-like geometry to four equivalent O(4) atoms. All Li(1)-O(4) bond lengths are 1.97 Å. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 1-coordinate geometry to one O(7) and four equivalent O(5) atoms. The Sr(1)-O(7) bond length is 2.19 Å. All Sr(1)-O(5) bond lengths are 2.63 Å. In the second Sr site, Sr(2) is bonded in a 10-coordinate geometry to two equivalent O(2), four equivalent O(4), and four equivalent O(5) atoms. Both Sr(2)-O(2) bond lengths are 2.94 Å. All Sr(2)-O(4) bond lengths are 2.80 Å. All Sr(2)-O(5) bond lengths are 2.95 Å. There are two inequivalent V sites. In the first V site, V(1) is bonded to one O(7) and four equivalent O(4) atoms to form distorted VO5 trigonal bipyramids that share corners with four equivalent Si(1)O4 tetrahedra. The V(1)-O(7) bond length is 1.78 Å. All V(1)-O(4) bond lengths are 2.08 Å. In the second V site, V(2) is bonded in a 5-coordinate geometry to one O(6) and four equivalent O(5) atoms. The V(2)-O(6) bond length is 1.63 Å. All V(2)-O(5) bond lengths are 2.05 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(2), one O(3), and two equivalent O(4) atoms to form SiO4 tetrahedra that share  a cornercorner with one Si(1)O4 tetrahedra,  a cornercorner with one Si(2)O4 tetrahedra, and corners with two equivalent V(1)O5 trigonal bipyramids. The Si(1)-O(2) bond length is 1.65 Å. The Si(1)-O(3) bond length is 1.61 Å. Both Si(1)-O(4) bond lengths are 1.63 Å. In the second Si site, Si(2) is bonded to one O(1), one O(3), and two equivalent O(5) atoms to form corner-sharing SiO4 tetrahedra. The Si(2)-O(1) bond length is 1.69 Å. The Si(2)-O(3) bond length is 1.62 Å. Both Si(2)-O(5) bond lengths are 1.64 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to 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 linear geometry to one Si(1) and one Si(2) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Li(1), one Sr(2), one V(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 4-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 single-bond geometry to one V(2) atom. In the seventh O site, O(7) is bonded in a linear geometry to one Sr(1) and one V(1) atom.