YCo3F15 crystallizes in the monoclinic P2_1/m space group. Y(1) is bonded in a 6-coordinate geometry to one F(1), one F(3), two equivalent F(5), and two equivalent F(8) atoms. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in an octahedral geometry to two equivalent F(4), two equivalent F(5), and two equivalent F(7) atoms. In the second Co site, Co(2) is bonded in a 6-coordinate geometry to one F(4), one F(5), one F(8), one F(9), and two equivalent F(6) atoms. There are nine inequivalent F sites. In the first F site, F(1) is bonded in a linear geometry to one Y(1) and one F(2) atom. In the second F site, F(2) is bonded in a single-bond geometry to one F(1) atom. In the third F site, F(3) is bonded in a single-bond geometry to one Y(1) atom. In the fourth F site, F(4) is bonded in a bent 120 degrees geometry to one Co(1) and one Co(2) atom. In the fifth F site, F(5) is bonded in a 3-coordinate geometry to one Y(1), one Co(1), and one Co(2) atom. In the sixth F site, F(6) is bonded in a water-like geometry to two equivalent Co(2) atoms. In the seventh F site, F(7) is bonded in a single-bond geometry to one Co(1) atom. In the eighth F site, F(8) is bonded in a linear geometry to one Y(1) and one Co(2) atom. In the ninth F site, F(9) is bonded in a single-bond geometry to one Co(2) atom.
YCo3F15 crystallizes in the monoclinic P2_1/m space group. Y(1) is bonded in a 6-coordinate geometry to one F(1), one F(3), two equivalent F(5), and two equivalent F(8) atoms. The Y(1)-F(1) bond length is 2.77 Å. The Y(1)-F(3) bond length is 1.98 Å. Both Y(1)-F(5) bond lengths are 2.25 Å. Both Y(1)-F(8) bond lengths are 2.23 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded in an octahedral geometry to two equivalent F(4), two equivalent F(5), and two equivalent F(7) atoms. Both Co(1)-F(4) bond lengths are 1.84 Å. Both Co(1)-F(5) bond lengths are 2.09 Å. Both Co(1)-F(7) bond lengths are 1.71 Å. In the second Co site, Co(2) is bonded in a 6-coordinate geometry to one F(4), one F(5), one F(8), one F(9), and two equivalent F(6) atoms. The Co(2)-F(4) bond length is 2.06 Å. The Co(2)-F(5) bond length is 2.42 Å. The Co(2)-F(8) bond length is 1.90 Å. The Co(2)-F(9) bond length is 1.74 Å. There is one shorter (1.92 Å) and one longer (1.99 Å) Co(2)-F(6) bond length. There are nine inequivalent F sites. In the first F site, F(1) is bonded in a linear geometry to one Y(1) and one F(2) atom. The F(1)-F(2) bond length is 1.43 Å. In the second F site, F(2) is bonded in a single-bond geometry to one F(1) atom. In the third F site, F(3) is bonded in a single-bond geometry to one Y(1) atom. In the fourth F site, F(4) is bonded in a bent 120 degrees geometry to one Co(1) and one Co(2) atom. In the fifth F site, F(5) is bonded in a 3-coordinate geometry to one Y(1), one Co(1), and one Co(2) atom. In the sixth F site, F(6) is bonded in a water-like geometry to two equivalent Co(2) atoms. In the seventh F site, F(7) is bonded in a single-bond geometry to one Co(1) atom. In the eighth F site, F(8) is bonded in a linear geometry to one Y(1) and one Co(2) atom. In the ninth F site, F(9) is bonded in a single-bond geometry to one Co(2) atom.