LiSr2V2(Si2O7)2 crystallizes in the monoclinic C2 space group. Li(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(6), and two equivalent O(8) atoms. Sr(1) is bonded in a 11-coordinate geometry to one O(6), two equivalent O(1), two equivalent O(4), two equivalent O(5), two equivalent O(7), and two equivalent O(8) atoms. V(1) is bonded to one O(4), one O(5), one O(6), one O(7), and one O(8) atom to form distorted VO5 trigonal bipyramids that share corners with two equivalent Si(1)O4 tetrahedra and corners with two equivalent Si(2)O4 tetrahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(4), and one O(8) atom 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), one O(5), and one O(7) atom 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. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to two equivalent Sr(1), one Si(1), and one Si(2) atom. In the second O site, O(2) is bonded in a T-shaped geometry to one Li(1) and two equivalent Si(1) atoms. In the third O site, O(3) is bonded in a linear geometry to two equivalent Si(2) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one V(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one V(1), and one Si(2) atom. In the sixth O site, O(6) is bonded in a distorted L-shaped geometry to one Li(1), one Sr(1), and one V(1) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one V(1), and one Si(2) atom. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Li(1), two equivalent Sr(1), one V(1), and one Si(1) atom.
LiSr2V2(Si2O7)2 crystallizes in the monoclinic C2 space group. Li(1) is bonded in a 5-coordinate geometry to one O(2), two equivalent O(6), and two equivalent O(8) atoms. The Li(1)-O(2) bond length is 2.11 Å. Both Li(1)-O(6) bond lengths are 1.88 Å. Both Li(1)-O(8) bond lengths are 2.25 Å. Sr(1) is bonded in a 11-coordinate geometry to one O(6), two equivalent O(1), two equivalent O(4), two equivalent O(5), two equivalent O(7), and two equivalent O(8) atoms. The Sr(1)-O(6) bond length is 2.84 Å. There is one shorter (2.86 Å) and one longer (2.90 Å) Sr(1)-O(1) bond length. There is one shorter (2.74 Å) and one longer (2.93 Å) Sr(1)-O(4) bond length. There is one shorter (2.65 Å) and one longer (2.87 Å) Sr(1)-O(5) bond length. There is one shorter (2.67 Å) and one longer (2.82 Å) Sr(1)-O(7) bond length. There is one shorter (2.69 Å) and one longer (3.15 Å) Sr(1)-O(8) bond length. V(1) is bonded to one O(4), one O(5), one O(6), one O(7), and one O(8) atom to form distorted VO5 trigonal bipyramids that share corners with two equivalent Si(1)O4 tetrahedra and corners with two equivalent Si(2)O4 tetrahedra. The V(1)-O(4) bond length is 2.06 Å. The V(1)-O(5) bond length is 2.02 Å. The V(1)-O(6) bond length is 1.74 Å. The V(1)-O(7) bond length is 2.02 Å. The V(1)-O(8) bond length is 2.07 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded to one O(1), one O(2), one O(4), and one O(8) atom 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(1) bond length is 1.67 Å. The Si(1)-O(2) bond length is 1.63 Å. The Si(1)-O(4) bond length is 1.62 Å. The Si(1)-O(8) bond length is 1.63 Å. In the second Si site, Si(2) is bonded to one O(1), one O(3), one O(5), and one O(7) atom 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(2)-O(1) bond length is 1.67 Å. The Si(2)-O(3) bond length is 1.61 Å. The Si(2)-O(5) bond length is 1.63 Å. The Si(2)-O(7) bond length is 1.62 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to two equivalent Sr(1), one Si(1), and one Si(2) atom. In the second O site, O(2) is bonded in a T-shaped geometry to one Li(1) and two equivalent Si(1) atoms. In the third O site, O(3) is bonded in a linear geometry to two equivalent Si(2) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one V(1), and one Si(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one V(1), and one Si(2) atom. In the sixth O site, O(6) is bonded in a distorted L-shaped geometry to one Li(1), one Sr(1), and one V(1) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one V(1), and one Si(2) atom. In the eighth O site, O(8) is bonded in a 5-coordinate geometry to one Li(1), two equivalent Sr(1), one V(1), and one Si(1) atom.