TbF3 is Cementite structured and crystallizes in the orthorhombic Pnma space group. Tb(1) is bonded in a 9-coordinate geometry to three equivalent F(2) and six equivalent F(1) atoms. There are two inequivalent F sites. In the first F site, F(2) is bonded in a distorted trigonal planar geometry to three equivalent Tb(1) atoms. In the second F site, F(1) is bonded in a distorted trigonal planar geometry to three equivalent Tb(1) atoms.
TbF3 is Cementite structured and crystallizes in the orthorhombic Pnma space group. Tb(1) is bonded in a 9-coordinate geometry to three equivalent F(2) and six equivalent F(1) atoms. There are a spread of Tb(1)-F(2) bond distances ranging from 2.31-2.45 Å. There are four shorter (2.30 Å) and two longer (2.31 Å) Tb(1)-F(1) bond lengths. There are two inequivalent F sites. In the first F site, F(2) is bonded in a distorted trigonal planar geometry to three equivalent Tb(1) atoms. In the second F site, F(1) is bonded in a distorted trigonal planar geometry to three equivalent Tb(1) atoms.