Tb4Ni3Ge8 crystallizes in the orthorhombic Pmm2 space group. There are four inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 14-coordinate geometry to four equivalent Ni(2), two equivalent Ge(2), two equivalent Ge(5), two equivalent Ge(7), and four equivalent Ge(3) atoms. In the second Tb site, Tb(2) is bonded in a 14-coordinate geometry to four equivalent Ni(3), two equivalent Ge(1), two equivalent Ge(6), two equivalent Ge(8), and four equivalent Ge(4) atoms. In the third Tb site, Tb(3) is bonded in a 10-coordinate geometry to two equivalent Ge(4), two equivalent Ge(5), two equivalent Ge(7), and four equivalent Ge(1) atoms. In the fourth Tb site, Tb(4) is bonded in a 14-coordinate geometry to four equivalent Ni(1), two equivalent Ge(3), two equivalent Ge(6), two equivalent Ge(8), and four equivalent Ge(2) atoms. There are three inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to four equivalent Tb(4), one Ge(2), two equivalent Ge(6), and two equivalent Ge(8) atoms. In the second Ni site, Ni(2) is bonded in a 5-coordinate geometry to four equivalent Tb(1), one Ge(3), two equivalent Ge(5), and two equivalent Ge(7) atoms. In the third Ni site, Ni(3) is bonded in a 9-coordinate geometry to four equivalent Tb(2), one Ge(4), two equivalent Ge(6), and two equivalent Ge(8) atoms. There are eight inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to two equivalent Tb(2), four equivalent Tb(3), and two equivalent Ge(4) atoms. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Tb(1), four equivalent Tb(4), one Ni(1), and two equivalent Ge(3) atoms. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Tb(4), four equivalent Tb(1), one Ni(2), and two equivalent Ge(2) atoms. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to two equivalent Tb(3), four equivalent Tb(2), one Ni(3), and two equivalent Ge(1) atoms. In the fifth Ge site, Ge(5) is bonded in a 10-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), two equivalent Ni(2), and four equivalent Ge(7) atoms. In the sixth Ge site, Ge(6) is bonded in a 8-coordinate geometry to two equivalent Tb(2), two equivalent Tb(4), two equivalent Ni(1), and two equivalent Ni(3) atoms. In the seventh Ge site, Ge(7) is bonded in a 10-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), two equivalent Ni(2), and four equivalent Ge(5) atoms. In the eighth Ge site, Ge(8) is bonded in a 8-coordinate geometry to two equivalent Tb(2), two equivalent Tb(4), two equivalent Ni(1), and two equivalent Ni(3) atoms.
Tb4Ni3Ge8 crystallizes in the orthorhombic Pmm2 space group. There are four inequivalent Tb sites. In the first Tb site, Tb(1) is bonded in a 14-coordinate geometry to four equivalent Ni(2), two equivalent Ge(2), two equivalent Ge(5), two equivalent Ge(7), and four equivalent Ge(3) atoms. All Tb(1)-Ni(2) bond lengths are 3.19 Å. Both Tb(1)-Ge(2) bond lengths are 3.19 Å. Both Tb(1)-Ge(5) bond lengths are 3.25 Å. Both Tb(1)-Ge(7) bond lengths are 3.24 Å. All Tb(1)-Ge(3) bond lengths are 3.08 Å. In the second Tb site, Tb(2) is bonded in a 14-coordinate geometry to four equivalent Ni(3), two equivalent Ge(1), two equivalent Ge(6), two equivalent Ge(8), and four equivalent Ge(4) atoms. All Tb(2)-Ni(3) bond lengths are 3.15 Å. Both Tb(2)-Ge(1) bond lengths are 3.33 Å. Both Tb(2)-Ge(6) bond lengths are 3.13 Å. Both Tb(2)-Ge(8) bond lengths are 3.16 Å. All Tb(2)-Ge(4) bond lengths are 3.11 Å. In the third Tb site, Tb(3) is bonded in a 10-coordinate geometry to two equivalent Ge(4), two equivalent Ge(5), two equivalent Ge(7), and four equivalent Ge(1) atoms. Both Tb(3)-Ge(4) bond lengths are 3.26 Å. Both Tb(3)-Ge(5) bond lengths are 3.03 Å. Both Tb(3)-Ge(7) bond lengths are 3.03 Å. All Tb(3)-Ge(1) bond lengths are 3.08 Å. In the fourth Tb site, Tb(4) is bonded in a 14-coordinate geometry to four equivalent Ni(1), two equivalent Ge(3), two equivalent Ge(6), two equivalent Ge(8), and four equivalent Ge(2) atoms. All Tb(4)-Ni(1) bond lengths are 3.14 Å. Both Tb(4)-Ge(3) bond lengths are 3.26 Å. Both Tb(4)-Ge(6) bond lengths are 3.16 Å. Both Tb(4)-Ge(8) bond lengths are 3.13 Å. All Tb(4)-Ge(2) bond lengths are 3.11 Å. There are three inequivalent Ni sites. In the first Ni site, Ni(1) is bonded in a 9-coordinate geometry to four equivalent Tb(4), one Ge(2), two equivalent Ge(6), and two equivalent Ge(8) atoms. The Ni(1)-Ge(2) bond length is 2.28 Å. Both Ni(1)-Ge(6) bond lengths are 2.39 Å. Both Ni(1)-Ge(8) bond lengths are 2.36 Å. In the second Ni site, Ni(2) is bonded in a 5-coordinate geometry to four equivalent Tb(1), one Ge(3), two equivalent Ge(5), and two equivalent Ge(7) atoms. The Ni(2)-Ge(3) bond length is 2.31 Å. Both Ni(2)-Ge(5) bond lengths are 2.38 Å. Both Ni(2)-Ge(7) bond lengths are 2.39 Å. In the third Ni site, Ni(3) is bonded in a 9-coordinate geometry to four equivalent Tb(2), one Ge(4), two equivalent Ge(6), and two equivalent Ge(8) atoms. The Ni(3)-Ge(4) bond length is 2.31 Å. Both Ni(3)-Ge(6) bond lengths are 2.35 Å. Both Ni(3)-Ge(8) bond lengths are 2.38 Å. There are eight inequivalent Ge sites. In the first Ge site, Ge(1) is bonded in a 8-coordinate geometry to two equivalent Tb(2), four equivalent Tb(3), and two equivalent Ge(4) atoms. Both Ge(1)-Ge(4) bond lengths are 2.56 Å. In the second Ge site, Ge(2) is bonded in a 9-coordinate geometry to two equivalent Tb(1), four equivalent Tb(4), one Ni(1), and two equivalent Ge(3) atoms. Both Ge(2)-Ge(3) bond lengths are 2.50 Å. In the third Ge site, Ge(3) is bonded in a 9-coordinate geometry to two equivalent Tb(4), four equivalent Tb(1), one Ni(2), and two equivalent Ge(2) atoms. In the fourth Ge site, Ge(4) is bonded in a 9-coordinate geometry to two equivalent Tb(3), four equivalent Tb(2), one Ni(3), and two equivalent Ge(1) atoms. In the fifth Ge site, Ge(5) is bonded in a 10-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), two equivalent Ni(2), and four equivalent Ge(7) atoms. All Ge(5)-Ge(7) bond lengths are 2.91 Å. In the sixth Ge site, Ge(6) is bonded in a 8-coordinate geometry to two equivalent Tb(2), two equivalent Tb(4), two equivalent Ni(1), and two equivalent Ni(3) atoms. In the seventh Ge site, Ge(7) is bonded in a 10-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), two equivalent Ni(2), and four equivalent Ge(5) atoms. In the eighth Ge site, Ge(8) is bonded in a 8-coordinate geometry to two equivalent Tb(2), two equivalent Tb(4), two equivalent Ni(1), and two equivalent Ni(3) atoms.