Tb4Pt3Cu crystallizes in the monoclinic Pm space group. There are four inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 7-coordinate geometry to one Pt(1), two equivalent Pt(2), two equivalent Pt(3), and two equivalent Cu(1) atoms. In the second Tb site, Tb(2) is bonded in a 7-coordinate geometry to two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(3), and one Cu(1) atom. In the third Tb site, Tb(3) is bonded in a 7-coordinate geometry to one Pt(3), two equivalent Pt(1), two equivalent Pt(2), and two equivalent Cu(1) atoms. In the fourth Tb site, Tb(4) is bonded in a 7-coordinate geometry to one Pt(2), two equivalent Pt(1), two equivalent Pt(3), and two equivalent Cu(1) atoms. There are three inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 7-coordinate geometry to one Tb(1), two equivalent Tb(2), two equivalent Tb(3), and two equivalent Tb(4) atoms. In the second Pt site, Pt(2) is bonded in a 9-coordinate geometry to one Tb(4), two equivalent Tb(1), two equivalent Tb(2), two equivalent Tb(3), and two equivalent Cu(1) atoms. In the third Pt site, Pt(3) is bonded in a 7-coordinate geometry to one Tb(3), two equivalent Tb(1), two equivalent Tb(2), and two equivalent Tb(4) atoms. Cu(1) is bonded in a 9-coordinate geometry to one Tb(2), two equivalent Tb(1), two equivalent Tb(3), two equivalent Tb(4), and two equivalent Pt(2) atoms.
Tb4Pt3Cu crystallizes in the monoclinic Pm space group. There are four inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 7-coordinate geometry to one Pt(1), two equivalent Pt(2), two equivalent Pt(3), and two equivalent Cu(1) atoms. The Tb(1)-Pt(1) bond length is 3.08 Å. Both Tb(1)-Pt(2) bond lengths are 3.01 Å. Both Tb(1)-Pt(3) bond lengths are 2.93 Å. There is one shorter (2.94 Å) and one longer (3.00 Å) Tb(1)-Cu(1) bond length. In the second Tb site, Tb(2) is bonded in a 7-coordinate geometry to two equivalent Pt(1), two equivalent Pt(2), two equivalent Pt(3), and one Cu(1) atom. There is one shorter (2.86 Å) and one longer (3.02 Å) Tb(2)-Pt(1) bond length. Both Tb(2)-Pt(2) bond lengths are 3.01 Å. Both Tb(2)-Pt(3) bond lengths are 2.98 Å. The Tb(2)-Cu(1) bond length is 2.95 Å. In the third Tb site, Tb(3) is bonded in a 7-coordinate geometry to one Pt(3), two equivalent Pt(1), two equivalent Pt(2), and two equivalent Cu(1) atoms. The Tb(3)-Pt(3) bond length is 3.03 Å. Both Tb(3)-Pt(1) bond lengths are 2.93 Å. There is one shorter (2.96 Å) and one longer (3.00 Å) Tb(3)-Pt(2) bond length. Both Tb(3)-Cu(1) bond lengths are 3.03 Å. In the fourth Tb site, Tb(4) is bonded in a 7-coordinate geometry to one Pt(2), two equivalent Pt(1), two equivalent Pt(3), and two equivalent Cu(1) atoms. The Tb(4)-Pt(2) bond length is 2.94 Å. Both Tb(4)-Pt(1) bond lengths are 2.95 Å. There is one shorter (2.85 Å) and one longer (3.00 Å) Tb(4)-Pt(3) bond length. Both Tb(4)-Cu(1) bond lengths are 3.02 Å. There are three inequivalent Pt sites. In the first Pt site, Pt(1) is bonded in a 7-coordinate geometry to one Tb(1), two equivalent Tb(2), two equivalent Tb(3), and two equivalent Tb(4) atoms. In the second Pt site, Pt(2) is bonded in a 9-coordinate geometry to one Tb(4), two equivalent Tb(1), two equivalent Tb(2), two equivalent Tb(3), and two equivalent Cu(1) atoms. Both Pt(2)-Cu(1) bond lengths are 2.72 Å. In the third Pt site, Pt(3) is bonded in a 7-coordinate geometry to one Tb(3), two equivalent Tb(1), two equivalent Tb(2), and two equivalent Tb(4) atoms. Cu(1) is bonded in a 9-coordinate geometry to one Tb(2), two equivalent Tb(1), two equivalent Tb(3), two equivalent Tb(4), and two equivalent Pt(2) atoms.