Sr2InF7 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one F(1), one F(2), one F(4), one F(6), one F(7), two equivalent F(3), and two equivalent F(5) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one F(1), one F(2), one F(3), one F(5), one F(7), two equivalent F(4), and two equivalent F(6) atoms. In(1) is bonded in a distorted pentagonal bipyramidal geometry to one F(1), one F(2), one F(3), one F(4), one F(5), one F(6), and one F(7) atom. There are seven inequivalent F sites. In the first F site, F(6) is bonded to one Sr(1), two equivalent Sr(2), and one In(1) atom to form a mixture of corner and edge-sharing FSr3In tetrahedra. In the second F site, F(7) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one In(1) atom. In the third F site, F(1) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one In(1) atom. In the fourth F site, F(2) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Sr(2), and one In(1) atom. In the fifth F site, F(3) is bonded to one Sr(2), two equivalent Sr(1), and one In(1) atom to form a mixture of corner and edge-sharing FSr3In tetrahedra. In the sixth F site, F(4) is bonded to one Sr(1), two equivalent Sr(2), and one In(1) atom to form a mixture of corner and edge-sharing FSr3In tetrahedra. In the seventh F site, F(5) is bonded to one Sr(2), two equivalent Sr(1), and one In(1) atom to form a mixture of corner and edge-sharing FSr3In tetrahedra.
Sr2InF7 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 9-coordinate geometry to one F(1), one F(2), one F(4), one F(6), one F(7), two equivalent F(3), and two equivalent F(5) atoms. The Sr(1)-F(1) bond length is 2.62 Å. The Sr(1)-F(2) bond length is 2.46 Å. The Sr(1)-F(4) bond length is 2.61 Å. The Sr(1)-F(6) bond length is 2.56 Å. The Sr(1)-F(7) bond length is 2.57 Å. There is one shorter (2.52 Å) and one longer (2.64 Å) Sr(1)-F(3) bond length. There is one shorter (2.50 Å) and one longer (2.51 Å) Sr(1)-F(5) bond length. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one F(1), one F(2), one F(3), one F(5), one F(7), two equivalent F(4), and two equivalent F(6) atoms. The Sr(2)-F(1) bond length is 2.60 Å. The Sr(2)-F(2) bond length is 2.46 Å. The Sr(2)-F(3) bond length is 2.50 Å. The Sr(2)-F(5) bond length is 2.56 Å. The Sr(2)-F(7) bond length is 2.56 Å. There is one shorter (2.54 Å) and one longer (2.65 Å) Sr(2)-F(4) bond length. There is one shorter (2.56 Å) and one longer (2.58 Å) Sr(2)-F(6) bond length. In(1) is bonded in a distorted pentagonal bipyramidal geometry to one F(1), one F(2), one F(3), one F(4), one F(5), one F(6), and one F(7) atom. The In(1)-F(1) bond length is 2.11 Å. The In(1)-F(2) bond length is 2.15 Å. The In(1)-F(3) bond length is 2.15 Å. The In(1)-F(4) bond length is 2.15 Å. The In(1)-F(5) bond length is 2.18 Å. The In(1)-F(6) bond length is 2.19 Å. The In(1)-F(7) bond length is 2.10 Å. There are seven inequivalent F sites. In the first F site, F(6) is bonded to one Sr(1), two equivalent Sr(2), and one In(1) atom to form a mixture of corner and edge-sharing FSr3In tetrahedra. In the second F site, F(7) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one In(1) atom. In the third F site, F(1) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one In(1) atom. In the fourth F site, F(2) is bonded in a distorted trigonal non-coplanar geometry to one Sr(1), one Sr(2), and one In(1) atom. In the fifth F site, F(3) is bonded to one Sr(2), two equivalent Sr(1), and one In(1) atom to form a mixture of corner and edge-sharing FSr3In tetrahedra. In the sixth F site, F(4) is bonded to one Sr(1), two equivalent Sr(2), and one In(1) atom to form a mixture of corner and edge-sharing FSr3In tetrahedra. In the seventh F site, F(5) is bonded to one Sr(2), two equivalent Sr(1), and one In(1) atom to form a mixture of corner and edge-sharing FSr3In tetrahedra.