TbF4 crystallizes in the monoclinic C2/c space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 8-coordinate geometry to one F(2), one F(3), one F(4), one F(5), one F(6), one F(7), and two equivalent F(1) atoms. In the second Tb site, Tb(2) is bonded in a 8-coordinate geometry to two equivalent F(2), two equivalent F(5), two equivalent F(6), and two equivalent F(7) atoms. There are seven inequivalent F sites. In the first F site, F(7) is bonded in a bent 150 degrees geometry to one Tb(1) and one Tb(2) atom. In the second F site, F(1) is bonded in a bent 150 degrees geometry to two equivalent Tb(1) atoms. In the third F site, F(2) is bonded in a bent 150 degrees geometry to one Tb(1) and one Tb(2) atom. In the fourth F site, F(3) is bonded in a linear geometry to two equivalent Tb(1) atoms. In the fifth F site, F(4) is bonded in a linear geometry to two equivalent Tb(1) atoms. In the sixth F site, F(5) is bonded in a bent 150 degrees geometry to one Tb(1) and one Tb(2) atom. In the seventh F site, F(6) is bonded in a linear geometry to one Tb(1) and one Tb(2) atom.
TbF4 crystallizes in the monoclinic C2/c space group. There are two inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 8-coordinate geometry to one F(2), one F(3), one F(4), one F(5), one F(6), one F(7), and two equivalent F(1) atoms. The Tb(1)-F(2) bond length is 2.22 Å. The Tb(1)-F(3) bond length is 2.18 Å. The Tb(1)-F(4) bond length is 2.35 Å. The Tb(1)-F(5) bond length is 2.40 Å. The Tb(1)-F(6) bond length is 2.58 Å. The Tb(1)-F(7) bond length is 2.24 Å. There is one shorter (2.15 Å) and one longer (2.17 Å) Tb(1)-F(1) bond length. In the second Tb site, Tb(2) is bonded in a 8-coordinate geometry to two equivalent F(2), two equivalent F(5), two equivalent F(6), and two equivalent F(7) atoms. Both Tb(2)-F(2) bond lengths are 2.15 Å. Both Tb(2)-F(5) bond lengths are 2.29 Å. Both Tb(2)-F(6) bond lengths are 2.42 Å. Both Tb(2)-F(7) bond lengths are 2.29 Å. There are seven inequivalent F sites. In the first F site, F(7) is bonded in a bent 150 degrees geometry to one Tb(1) and one Tb(2) atom. In the second F site, F(1) is bonded in a bent 150 degrees geometry to two equivalent Tb(1) atoms. In the third F site, F(2) is bonded in a bent 150 degrees geometry to one Tb(1) and one Tb(2) atom. In the fourth F site, F(3) is bonded in a linear geometry to two equivalent Tb(1) atoms. In the fifth F site, F(4) is bonded in a linear geometry to two equivalent Tb(1) atoms. In the sixth F site, F(5) is bonded in a bent 150 degrees geometry to one Tb(1) and one Tb(2) atom. In the seventh F site, F(6) is bonded in a linear geometry to one Tb(1) and one Tb(2) atom.