CeHf2F11 crystallizes in the monoclinic C2 space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 8-coordinate geometry to two equivalent F(1), two equivalent F(10), two equivalent F(12), and two equivalent F(3) atoms. In the second Ce site, Ce(2) is bonded in a 8-coordinate geometry to two equivalent F(11), two equivalent F(2), two equivalent F(4), and two equivalent F(9) atoms. There are two inequivalent Hf sites. In the first Hf site, Hf(1) is bonded to one F(1), one F(10), one F(2), one F(5), one F(7), one F(8), and one F(9) atom to form distorted corner-sharing HfF7 pentagonal bipyramids. In the second Hf site, Hf(2) is bonded to one F(11), one F(12), one F(3), one F(4), one F(6), one F(7), and one F(8) atom to form distorted corner-sharing HfF7 pentagonal bipyramids. There are twelve inequivalent F sites. In the first F site, F(1) is bonded in a bent 150 degrees geometry to one Ce(1) and one Hf(1) atom. In the second F site, F(2) is bonded in a bent 150 degrees geometry to one Ce(2) and one Hf(1) atom. In the third F site, F(3) is bonded in a bent 150 degrees geometry to one Ce(1) and one Hf(2) atom. In the fourth F site, F(4) is bonded in a bent 150 degrees geometry to one Ce(2) and one Hf(2) atom. In the fifth F site, F(5) is bonded in a linear geometry to two equivalent Hf(1) atoms. In the sixth F site, F(6) is bonded in a linear geometry to two equivalent Hf(2) atoms. In the seventh F site, F(7) is bonded in a linear geometry to one Hf(1) and one Hf(2) atom. In the eighth F site, F(8) is bonded in a bent 150 degrees geometry to one Hf(1) and one Hf(2) atom. In the ninth F site, F(9) is bonded in a bent 150 degrees geometry to one Ce(2) and one Hf(1) atom. In the tenth F site, F(10) is bonded in a bent 150 degrees geometry to one Ce(1) and one Hf(1) atom. In the eleventh F site, F(11) is bonded in a bent 150 degrees geometry to one Ce(2) and one Hf(2) atom. In the twelfth F site, F(12) is bonded in a bent 150 degrees geometry to one Ce(1) and one Hf(2) atom.
CeHf2F11 crystallizes in the monoclinic C2 space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 8-coordinate geometry to two equivalent F(1), two equivalent F(10), two equivalent F(12), and two equivalent F(3) atoms. Both Ce(1)-F(1) bond lengths are 2.39 Å. Both Ce(1)-F(10) bond lengths are 2.40 Å. Both Ce(1)-F(12) bond lengths are 2.40 Å. Both Ce(1)-F(3) bond lengths are 2.40 Å. In the second Ce site, Ce(2) is bonded in a 8-coordinate geometry to two equivalent F(11), two equivalent F(2), two equivalent F(4), and two equivalent F(9) atoms. Both Ce(2)-F(11) bond lengths are 2.40 Å. Both Ce(2)-F(2) bond lengths are 2.39 Å. Both Ce(2)-F(4) bond lengths are 2.39 Å. Both Ce(2)-F(9) bond lengths are 2.40 Å. There are two inequivalent Hf sites. In the first Hf site, Hf(1) is bonded to one F(1), one F(10), one F(2), one F(5), one F(7), one F(8), and one F(9) atom to form distorted corner-sharing HfF7 pentagonal bipyramids. The Hf(1)-F(1) bond length is 2.02 Å. The Hf(1)-F(10) bond length is 2.01 Å. The Hf(1)-F(2) bond length is 2.02 Å. The Hf(1)-F(5) bond length is 2.07 Å. The Hf(1)-F(7) bond length is 2.08 Å. The Hf(1)-F(8) bond length is 2.07 Å. The Hf(1)-F(9) bond length is 2.01 Å. In the second Hf site, Hf(2) is bonded to one F(11), one F(12), one F(3), one F(4), one F(6), one F(7), and one F(8) atom to form distorted corner-sharing HfF7 pentagonal bipyramids. The Hf(2)-F(11) bond length is 2.01 Å. The Hf(2)-F(12) bond length is 2.01 Å. The Hf(2)-F(3) bond length is 2.02 Å. The Hf(2)-F(4) bond length is 2.02 Å. The Hf(2)-F(6) bond length is 2.07 Å. The Hf(2)-F(7) bond length is 2.07 Å. The Hf(2)-F(8) bond length is 2.08 Å. There are twelve inequivalent F sites. In the first F site, F(1) is bonded in a bent 150 degrees geometry to one Ce(1) and one Hf(1) atom. In the second F site, F(2) is bonded in a bent 150 degrees geometry to one Ce(2) and one Hf(1) atom. In the third F site, F(3) is bonded in a bent 150 degrees geometry to one Ce(1) and one Hf(2) atom. In the fourth F site, F(4) is bonded in a bent 150 degrees geometry to one Ce(2) and one Hf(2) atom. In the fifth F site, F(5) is bonded in a linear geometry to two equivalent Hf(1) atoms. In the sixth F site, F(6) is bonded in a linear geometry to two equivalent Hf(2) atoms. In the seventh F site, F(7) is bonded in a linear geometry to one Hf(1) and one Hf(2) atom. In the eighth F site, F(8) is bonded in a bent 150 degrees geometry to one Hf(1) and one Hf(2) atom. In the ninth F site, F(9) is bonded in a bent 150 degrees geometry to one Ce(2) and one Hf(1) atom. In the tenth F site, F(10) is bonded in a bent 150 degrees geometry to one Ce(1) and one Hf(1) atom. In the eleventh F site, F(11) is bonded in a bent 150 degrees geometry to one Ce(2) and one Hf(2) atom. In the twelfth F site, F(12) is bonded in a bent 150 degrees geometry to one Ce(1) and one Hf(2) atom.