Sr5V3O13 crystallizes in the hexagonal P6_3 space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to three equivalent O(1), three equivalent O(2), and three equivalent O(4) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to three equivalent O(1), three equivalent O(3), and three equivalent O(4) atoms. In the third Sr site, Sr(3) is bonded to one O(1), one O(4), one O(5), two equivalent O(2), and two equivalent O(3) atoms to form distorted SrO7 pentagonal bipyramids that share corners with six equivalent Sr(3)O7 pentagonal bipyramids, corners with four equivalent V(1)O4 tetrahedra, and  an edgeedge with one V(1)O4 tetrahedra. V(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form VO4 tetrahedra that share corners with four equivalent Sr(3)O7 pentagonal bipyramids and  an edgeedge with one Sr(3)O7 pentagonal bipyramid. There are five inequivalent O sites. In the first O site, O(4) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), and one V(1) atom. In the second O site, O(5) is bonded in a trigonal planar geometry to three equivalent Sr(3) atoms. In the third O site, O(1) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), and one V(1) atom. In the fourth O site, O(2) is bonded in a 1-coordinate geometry to one Sr(1), two equivalent Sr(3), and one V(1) atom. In the fifth O site, O(3) is bonded in a 1-coordinate geometry to one Sr(2), two equivalent Sr(3), and one V(1) atom.
Sr5V3O13 crystallizes in the hexagonal P6_3 space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to three equivalent O(1), three equivalent O(2), and three equivalent O(4) atoms. All Sr(1)-O(1) bond lengths are 2.58 Å. All Sr(1)-O(2) bond lengths are 2.95 Å. All Sr(1)-O(4) bond lengths are 2.61 Å. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to three equivalent O(1), three equivalent O(3), and three equivalent O(4) atoms. All Sr(2)-O(1) bond lengths are 2.56 Å. All Sr(2)-O(3) bond lengths are 3.00 Å. All Sr(2)-O(4) bond lengths are 2.59 Å. In the third Sr site, Sr(3) is bonded to one O(1), one O(4), one O(5), two equivalent O(2), and two equivalent O(3) atoms to form distorted SrO7 pentagonal bipyramids that share corners with six equivalent Sr(3)O7 pentagonal bipyramids, corners with four equivalent V(1)O4 tetrahedra, and  an edgeedge with one V(1)O4 tetrahedra. The Sr(3)-O(1) bond length is 2.81 Å. The Sr(3)-O(4) bond length is 2.50 Å. The Sr(3)-O(5) bond length is 2.53 Å. There is one shorter (2.51 Å) and one longer (2.67 Å) Sr(3)-O(2) bond length. There is one shorter (2.51 Å) and one longer (2.65 Å) Sr(3)-O(3) bond length. V(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form VO4 tetrahedra that share corners with four equivalent Sr(3)O7 pentagonal bipyramids and  an edgeedge with one Sr(3)O7 pentagonal bipyramid. The V(1)-O(1) bond length is 1.73 Å. The V(1)-O(2) bond length is 1.71 Å. The V(1)-O(3) bond length is 1.71 Å. The V(1)-O(4) bond length is 1.73 Å. There are five inequivalent O sites. In the first O site, O(4) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), and one V(1) atom. In the second O site, O(5) is bonded in a trigonal planar geometry to three equivalent Sr(3) atoms. In the third O site, O(1) is bonded in a 4-coordinate geometry to one Sr(1), one Sr(2), one Sr(3), and one V(1) atom. In the fourth O site, O(2) is bonded in a 1-coordinate geometry to one Sr(1), two equivalent Sr(3), and one V(1) atom. In the fifth O site, O(3) is bonded in a 1-coordinate geometry to one Sr(2), two equivalent Sr(3), and one V(1) atom.