Tb5Pb4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to one Pb(3), two equivalent Pb(2), and three equivalent Pb(1) atoms to form a mixture of distorted corner, edge, and face-sharing TbPb6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 39-41°. In the second Tb site, Tb(2) is bonded in a 7-coordinate geometry to one Pb(2), two equivalent Pb(3), and four equivalent Pb(1) atoms. In the third Tb site, Tb(3) is bonded to two equivalent Pb(1), two equivalent Pb(2), and two equivalent Pb(3) atoms to form a mixture of corner and face-sharing TbPb6 octahedra. The corner-sharing octahedral tilt angles range from 46-51°. There are three inequivalent Pb sites. In the first Pb site, Pb(3) is bonded in a 8-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), and four equivalent Tb(2) atoms. In the second Pb site, Pb(1) is bonded in a 8-coordinate geometry to one Tb(3), three equivalent Tb(1), and four equivalent Tb(2) atoms. In the third Pb site, Pb(2) is bonded in a 8-coordinate geometry to two equivalent Tb(2), two equivalent Tb(3), and four equivalent Tb(1) atoms.
Tb5Pb4 crystallizes in the orthorhombic Pnma space group. There are three inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to one Pb(3), two equivalent Pb(2), and three equivalent Pb(1) atoms to form a mixture of distorted corner, edge, and face-sharing TbPb6 pentagonal pyramids. The corner-sharing octahedral tilt angles range from 39-41°. The Tb(1)-Pb(3) bond length is 3.31 Å. There is one shorter (3.16 Å) and one longer (3.26 Å) Tb(1)-Pb(2) bond length. There are two shorter (3.13 Å) and one longer (3.25 Å) Tb(1)-Pb(1) bond length. In the second Tb site, Tb(2) is bonded in a 7-coordinate geometry to one Pb(2), two equivalent Pb(3), and four equivalent Pb(1) atoms. The Tb(2)-Pb(2) bond length is 3.48 Å. There is one shorter (3.18 Å) and one longer (3.49 Å) Tb(2)-Pb(3) bond length. There are a spread of Tb(2)-Pb(1) bond distances ranging from 3.26-3.91 Å. In the third Tb site, Tb(3) is bonded to two equivalent Pb(1), two equivalent Pb(2), and two equivalent Pb(3) atoms to form a mixture of corner and face-sharing TbPb6 octahedra. The corner-sharing octahedral tilt angles range from 46-51°. Both Tb(3)-Pb(1) bond lengths are 3.29 Å. There is one shorter (3.17 Å) and one longer (3.27 Å) Tb(3)-Pb(2) bond length. There is one shorter (3.15 Å) and one longer (3.27 Å) Tb(3)-Pb(3) bond length. There are three inequivalent Pb sites. In the first Pb site, Pb(3) is bonded in a 8-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), and four equivalent Tb(2) atoms. In the second Pb site, Pb(1) is bonded in a 8-coordinate geometry to one Tb(3), three equivalent Tb(1), and four equivalent Tb(2) atoms. In the third Pb site, Pb(2) is bonded in a 8-coordinate geometry to two equivalent Tb(2), two equivalent Tb(3), and four equivalent Tb(1) atoms.