Sr5Co3F19 crystallizes in the tetragonal I4/m space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one F(3), one F(7), two equivalent F(1), two equivalent F(2), and two equivalent F(6) atoms. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one F(3), one F(5), one F(7), two equivalent F(1), two equivalent F(2), and two equivalent F(6) atoms. In the third Sr site, Sr(3) is bonded in a 8-coordinate geometry to four equivalent F(3) and four equivalent F(5) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in an octahedral geometry to one F(5), one F(7), two equivalent F(1), and two equivalent F(6) atoms. In the second Co site, Co(2) is bonded to one F(4), one F(8), and four equivalent F(2) atoms to form corner-sharing CoF6 octahedra. The corner-sharing octahedra are not tilted. There are eight inequivalent F sites. In the first F site, F(1) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one Co(1) atom. In the second F site, F(7) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one Co(1) atom. In the third F site, F(8) is bonded in a linear geometry to two equivalent Co(2) atoms. In the fourth F site, F(2) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one Co(2) atom. In the fifth F site, F(3) is bonded to one Sr(1), one Sr(2), and two equivalent Sr(3) atoms to form a mixture of distorted corner and edge-sharing FSr4 tetrahedra. In the sixth F site, F(4) is bonded in a linear geometry to two equivalent Co(2) atoms. In the seventh F site, F(5) is bonded in a 4-coordinate geometry to one Sr(2), two equivalent Sr(3), and one Co(1) atom. In the eighth F site, F(6) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one Co(1) atom.
Sr5Co3F19 crystallizes in the tetragonal I4/m space group. There are three inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 8-coordinate geometry to one F(3), one F(7), two equivalent F(1), two equivalent F(2), and two equivalent F(6) atoms. The Sr(1)-F(3) bond length is 2.38 Å. The Sr(1)-F(7) bond length is 2.64 Å. Both Sr(1)-F(1) bond lengths are 2.54 Å. Both Sr(1)-F(2) bond lengths are 2.69 Å. Both Sr(1)-F(6) bond lengths are 2.62 Å. In the second Sr site, Sr(2) is bonded in a 9-coordinate geometry to one F(3), one F(5), one F(7), two equivalent F(1), two equivalent F(2), and two equivalent F(6) atoms. The Sr(2)-F(3) bond length is 2.57 Å. The Sr(2)-F(5) bond length is 2.73 Å. The Sr(2)-F(7) bond length is 2.63 Å. Both Sr(2)-F(1) bond lengths are 2.84 Å. Both Sr(2)-F(2) bond lengths are 2.69 Å. Both Sr(2)-F(6) bond lengths are 2.49 Å. In the third Sr site, Sr(3) is bonded in a 8-coordinate geometry to four equivalent F(3) and four equivalent F(5) atoms. All Sr(3)-F(3) bond lengths are 2.76 Å. All Sr(3)-F(5) bond lengths are 2.52 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in an octahedral geometry to one F(5), one F(7), two equivalent F(1), and two equivalent F(6) atoms. The Co(1)-F(5) bond length is 1.92 Å. The Co(1)-F(7) bond length is 1.87 Å. Both Co(1)-F(1) bond lengths are 1.95 Å. Both Co(1)-F(6) bond lengths are 1.97 Å. In the second Co site, Co(2) is bonded to one F(4), one F(8), and four equivalent F(2) atoms to form corner-sharing CoF6 octahedra. The corner-sharing octahedra are not tilted. The Co(2)-F(4) bond length is 1.88 Å. The Co(2)-F(8) bond length is 1.83 Å. All Co(2)-F(2) bond lengths are 1.93 Å. There are eight inequivalent F sites. In the first F site, F(1) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one Co(1) atom. In the second F site, F(7) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one Co(1) atom. In the third F site, F(8) is bonded in a linear geometry to two equivalent Co(2) atoms. In the fourth F site, F(2) is bonded in a distorted single-bond geometry to one Sr(1), one Sr(2), and one Co(2) atom. In the fifth F site, F(3) is bonded to one Sr(1), one Sr(2), and two equivalent Sr(3) atoms to form a mixture of distorted corner and edge-sharing FSr4 tetrahedra. In the sixth F site, F(4) is bonded in a linear geometry to two equivalent Co(2) atoms. In the seventh F site, F(5) is bonded in a 4-coordinate geometry to one Sr(2), two equivalent Sr(3), and one Co(1) atom. In the eighth F site, F(6) is bonded in a 3-coordinate geometry to one Sr(1), one Sr(2), and one Co(1) atom.