Tb6Pd3Ga19 crystallizes in the monoclinic Cm space group. There are six inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to one Ga(1), one Ga(3), one Ga(5), one Ga(7), two equivalent Ga(11), two equivalent Ga(13), two equivalent Ga(15), two equivalent Ga(19), and two equivalent Ga(9) atoms to form distorted TbGa14 cuboctahedra that share corners with two equivalent Ga(17)Tb4Ga6Pd2 cuboctahedra,  an edgeedge with one Ga(18)Tb4Ga4Pd4 cuboctahedra,  a faceface with one Ga(17)Tb4Ga6Pd2 cuboctahedra, and faces with two equivalent Tb(1)Ga14 cuboctahedra. In the second Tb site, Tb(2) is bonded to one Ga(2), one Ga(4), one Ga(6), one Ga(8), two equivalent Ga(10), two equivalent Ga(12), two equivalent Ga(14), and two equivalent Ga(16) atoms to form distorted TbGa12 cuboctahedra that share  an edgeedge with one Ga(18)Tb4Ga4Pd4 cuboctahedra,  an edgeedge with one Ga(17)Tb4Ga6Pd2 cuboctahedra, and faces with two equivalent Tb(2)Ga12 cuboctahedra. In the third Tb site, Tb(3) is bonded in a 14-coordinate geometry to one Pd(1), one Pd(2), one Ga(1), one Ga(5), two equivalent Ga(11), two equivalent Ga(15), two equivalent Ga(18), two equivalent Ga(4), and two equivalent Ga(7) atoms. In the fourth Tb site, Tb(4) is bonded in a 12-coordinate geometry to one Pd(3), one Ga(19), one Ga(2), one Ga(6), two equivalent Ga(12), two equivalent Ga(16), two equivalent Ga(17), two equivalent Ga(3), and two equivalent Ga(8) atoms. In the fifth Tb site, Tb(5) is bonded in a 12-coordinate geometry to one Pd(3), one Ga(19), one Ga(3), one Ga(7), two equivalent Ga(13), two equivalent Ga(17), two equivalent Ga(2), two equivalent Ga(5), and two equivalent Ga(9) atoms. In the sixth Tb site, Tb(6) is bonded in a 14-coordinate geometry to one Pd(1), one Pd(2), one Ga(4), one Ga(8), two equivalent Ga(1), two equivalent Ga(10), two equivalent Ga(14), two equivalent Ga(18), and two equivalent Ga(6) atoms. There are three inequivalent Pd sites. In the first Pd site, Pd(1) is bonded in a 10-coordinate geometry to one Tb(3), one Tb(6), one Ga(10), one Ga(16), two equivalent Ga(18), two equivalent Ga(4), and two equivalent Ga(6) atoms. In the second Pd site, Pd(2) is bonded in a 10-coordinate geometry to one Tb(3), one Tb(6), one Ga(11), one Ga(13), two equivalent Ga(1), two equivalent Ga(18), and two equivalent Ga(7) atoms. In the third Pd site, Pd(3) is bonded in a 10-coordinate geometry to one Tb(4), one Tb(5), one Ga(12), one Ga(14), two equivalent Ga(17), two equivalent Ga(2), and two equivalent Ga(8) atoms. There are nineteen inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 10-coordinate geometry to one Tb(1), one Tb(3), two equivalent Tb(6), two equivalent Pd(2), one Ga(10), one Ga(18), and two equivalent Ga(11) atoms. In the second Ga site, Ga(2) is bonded in a 10-coordinate geometry to one Tb(2), one Tb(4), two equivalent Tb(5), two equivalent Pd(3), one Ga(17), one Ga(9), and two equivalent Ga(12) atoms. In the third Ga site, Ga(3) is bonded in a 10-coordinate geometry to one Tb(1), one Tb(5), two equivalent Tb(4), one Ga(12), one Ga(17), two equivalent Ga(19), and two equivalent Ga(9) atoms. In the fourth Ga site, Ga(4) is bonded in a 10-coordinate geometry to one Tb(2), one Tb(6), two equivalent Tb(3), two equivalent Pd(1), one Ga(11), one Ga(18), and two equivalent Ga(10) atoms. In the fifth Ga site, Ga(5) is bonded in a 10-coordinate geometry to one Tb(1), one Tb(3), two equivalent Tb(5), one Ga(13), one Ga(17), two equivalent Ga(15), and two equivalent Ga(19) atoms. In the sixth Ga site, Ga(6) is bonded in a 10-coordinate geometry to one Tb(2), one Tb(4), two equivalent Tb(6), two equivalent Pd(1), one Ga(14), one Ga(18), and two equivalent Ga(16) atoms. In the seventh Ga site, Ga(7) is bonded in a 10-coordinate geometry to one Tb(1), one Tb(5), two equivalent Tb(3), two equivalent Pd(2), one Ga(15), one Ga(18), and two equivalent Ga(13) atoms. In the eighth Ga site, Ga(8) is bonded in a 10-coordinate geometry to one Tb(2), one Tb(6), two equivalent Tb(4), two equivalent Pd(3), one Ga(16), one Ga(17), and two equivalent Ga(14) atoms. In the ninth Ga site, Ga(9) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(5), one Ga(13), one Ga(19), one Ga(2), and two equivalent Ga(3) atoms. In the tenth Ga site, Ga(10) is bonded in a 9-coordinate geometry to two equivalent Tb(2), two equivalent Tb(6), one Pd(1), one Ga(1), one Ga(14), and two equivalent Ga(4) atoms. In the eleventh Ga site, Ga(11) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), one Pd(2), one Ga(15), one Ga(4), and two equivalent Ga(1) atoms. In the twelfth Ga site, Ga(12) is bonded in a 9-coordinate geometry to two equivalent Tb(2), two equivalent Tb(4), one Pd(3), one Ga(16), one Ga(3), and two equivalent Ga(2) atoms. In the thirteenth Ga site, Ga(13) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(5), one Pd(2), one Ga(5), one Ga(9), and two equivalent Ga(7) atoms. In the fourteenth Ga site, Ga(14) is bonded in a 9-coordinate geometry to two equivalent Tb(2), two equivalent Tb(6), one Pd(3), one Ga(10), one Ga(6), and two equivalent Ga(8) atoms. In the fifteenth Ga site, Ga(15) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), one Ga(11), one Ga(19), one Ga(7), and two equivalent Ga(5) atoms. In the sixteenth Ga site, Ga(16) is bonded in a 9-coordinate geometry to two equivalent Tb(2), two equivalent Tb(4), one Pd(1), one Ga(12), one Ga(8), and two equivalent Ga(6) atoms. In the seventeenth Ga site, Ga(17) is bonded to two equivalent Tb(4), two equivalent Tb(5), two equivalent Pd(3), one Ga(2), one Ga(3), one Ga(5), one Ga(8), and two equivalent Ga(19) atoms to form distorted GaTb4Ga6Pd2 cuboctahedra that share corners with two equivalent Tb(1)Ga14 cuboctahedra,  an edgeedge with one Tb(2)Ga12 cuboctahedra,  a faceface with one Tb(1)Ga14 cuboctahedra, and faces with two equivalent Ga(17)Tb4Ga6Pd2 cuboctahedra. In the eighteenth Ga site, Ga(18) is bonded to two equivalent Tb(3), two equivalent Tb(6), two equivalent Pd(1), two equivalent Pd(2), one Ga(1), one Ga(4), one Ga(6), and one Ga(7) atom to form GaTb4Ga4Pd4 cuboctahedra that share  an edgeedge with one Tb(2)Ga12 cuboctahedra,  an edgeedge with one Tb(1)Ga14 cuboctahedra, and faces with two equivalent Ga(18)Tb4Ga4Pd4 cuboctahedra. In the nineteenth Ga site, Ga(19) is bonded in a 12-coordinate geometry to one Tb(4), one Tb(5), two equivalent Tb(1), one Ga(15), one Ga(9), two equivalent Ga(17), two equivalent Ga(3), and two equivalent Ga(5) atoms.
Tb6Pd3Ga19 crystallizes in the monoclinic Cm space group. There are six inequivalent Tb sites. In the first Tb site, Tb(1) is bonded to one Ga(1), one Ga(3), one Ga(5), one Ga(7), two equivalent Ga(11), two equivalent Ga(13), two equivalent Ga(15), two equivalent Ga(19), and two equivalent Ga(9) atoms to form distorted TbGa14 cuboctahedra that share corners with two equivalent Ga(17)Tb4Ga6Pd2 cuboctahedra,  an edgeedge with one Ga(18)Tb4Ga4Pd4 cuboctahedra,  a faceface with one Ga(17)Tb4Ga6Pd2 cuboctahedra, and faces with two equivalent Tb(1)Ga14 cuboctahedra. The Tb(1)-Ga(1) bond length is 3.29 Å. The Tb(1)-Ga(3) bond length is 3.23 Å. The Tb(1)-Ga(5) bond length is 3.21 Å. The Tb(1)-Ga(7) bond length is 3.28 Å. Both Tb(1)-Ga(11) bond lengths are 3.22 Å. Both Tb(1)-Ga(13) bond lengths are 3.17 Å. Both Tb(1)-Ga(15) bond lengths are 3.13 Å. Both Tb(1)-Ga(19) bond lengths are 3.60 Å. Both Tb(1)-Ga(9) bond lengths are 3.15 Å. In the second Tb site, Tb(2) is bonded to one Ga(2), one Ga(4), one Ga(6), one Ga(8), two equivalent Ga(10), two equivalent Ga(12), two equivalent Ga(14), and two equivalent Ga(16) atoms to form distorted TbGa12 cuboctahedra that share  an edgeedge with one Ga(18)Tb4Ga4Pd4 cuboctahedra,  an edgeedge with one Ga(17)Tb4Ga6Pd2 cuboctahedra, and faces with two equivalent Tb(2)Ga12 cuboctahedra. The Tb(2)-Ga(2) bond length is 3.18 Å. The Tb(2)-Ga(4) bond length is 3.25 Å. The Tb(2)-Ga(6) bond length is 3.26 Å. The Tb(2)-Ga(8) bond length is 3.17 Å. Both Tb(2)-Ga(10) bond lengths are 3.18 Å. Both Tb(2)-Ga(12) bond lengths are 3.13 Å. Both Tb(2)-Ga(14) bond lengths are 3.15 Å. Both Tb(2)-Ga(16) bond lengths are 3.18 Å. In the third Tb site, Tb(3) is bonded in a 14-coordinate geometry to one Pd(1), one Pd(2), one Ga(1), one Ga(5), two equivalent Ga(11), two equivalent Ga(15), two equivalent Ga(18), two equivalent Ga(4), and two equivalent Ga(7) atoms. The Tb(3)-Pd(1) bond length is 3.05 Å. The Tb(3)-Pd(2) bond length is 3.10 Å. The Tb(3)-Ga(1) bond length is 3.43 Å. The Tb(3)-Ga(5) bond length is 3.46 Å. Both Tb(3)-Ga(11) bond lengths are 3.10 Å. Both Tb(3)-Ga(15) bond lengths are 3.08 Å. Both Tb(3)-Ga(18) bond lengths are 3.23 Å. Both Tb(3)-Ga(4) bond lengths are 3.09 Å. Both Tb(3)-Ga(7) bond lengths are 3.14 Å. In the fourth Tb site, Tb(4) is bonded in a 12-coordinate geometry to one Pd(3), one Ga(19), one Ga(2), one Ga(6), two equivalent Ga(12), two equivalent Ga(16), two equivalent Ga(17), two equivalent Ga(3), and two equivalent Ga(8) atoms. The Tb(4)-Pd(3) bond length is 3.06 Å. The Tb(4)-Ga(19) bond length is 3.08 Å. The Tb(4)-Ga(2) bond length is 3.50 Å. The Tb(4)-Ga(6) bond length is 3.53 Å. Both Tb(4)-Ga(12) bond lengths are 3.14 Å. Both Tb(4)-Ga(16) bond lengths are 3.15 Å. Both Tb(4)-Ga(17) bond lengths are 3.16 Å. Both Tb(4)-Ga(3) bond lengths are 3.13 Å. Both Tb(4)-Ga(8) bond lengths are 3.12 Å. In the fifth Tb site, Tb(5) is bonded in a 12-coordinate geometry to one Pd(3), one Ga(19), one Ga(3), one Ga(7), two equivalent Ga(13), two equivalent Ga(17), two equivalent Ga(2), two equivalent Ga(5), and two equivalent Ga(9) atoms. The Tb(5)-Pd(3) bond length is 3.10 Å. The Tb(5)-Ga(19) bond length is 3.05 Å. The Tb(5)-Ga(3) bond length is 3.48 Å. The Tb(5)-Ga(7) bond length is 3.56 Å. Both Tb(5)-Ga(13) bond lengths are 3.18 Å. Both Tb(5)-Ga(17) bond lengths are 3.16 Å. Both Tb(5)-Ga(2) bond lengths are 3.16 Å. Both Tb(5)-Ga(5) bond lengths are 3.11 Å. Both Tb(5)-Ga(9) bond lengths are 3.10 Å. In the sixth Tb site, Tb(6) is bonded in a 14-coordinate geometry to one Pd(1), one Pd(2), one Ga(4), one Ga(8), two equivalent Ga(1), two equivalent Ga(10), two equivalent Ga(14), two equivalent Ga(18), and two equivalent Ga(6) atoms. The Tb(6)-Pd(1) bond length is 3.07 Å. The Tb(6)-Pd(2) bond length is 3.07 Å. The Tb(6)-Ga(4) bond length is 3.45 Å. The Tb(6)-Ga(8) bond length is 3.45 Å. Both Tb(6)-Ga(1) bond lengths are 3.09 Å. Both Tb(6)-Ga(10) bond lengths are 3.10 Å. Both Tb(6)-Ga(14) bond lengths are 3.08 Å. Both Tb(6)-Ga(18) bond lengths are 3.22 Å. Both Tb(6)-Ga(6) bond lengths are 3.12 Å. There are three inequivalent Pd sites. In the first Pd site, Pd(1) is bonded in a 10-coordinate geometry to one Tb(3), one Tb(6), one Ga(10), one Ga(16), two equivalent Ga(18), two equivalent Ga(4), and two equivalent Ga(6) atoms. The Pd(1)-Ga(10) bond length is 2.59 Å. The Pd(1)-Ga(16) bond length is 2.60 Å. Both Pd(1)-Ga(18) bond lengths are 2.85 Å. Both Pd(1)-Ga(4) bond lengths are 2.73 Å. Both Pd(1)-Ga(6) bond lengths are 2.73 Å. In the second Pd site, Pd(2) is bonded in a 10-coordinate geometry to one Tb(3), one Tb(6), one Ga(11), one Ga(13), two equivalent Ga(1), two equivalent Ga(18), and two equivalent Ga(7) atoms. The Pd(2)-Ga(11) bond length is 2.57 Å. The Pd(2)-Ga(13) bond length is 2.57 Å. Both Pd(2)-Ga(1) bond lengths are 2.73 Å. Both Pd(2)-Ga(18) bond lengths are 2.86 Å. Both Pd(2)-Ga(7) bond lengths are 2.72 Å. In the third Pd site, Pd(3) is bonded in a 10-coordinate geometry to one Tb(4), one Tb(5), one Ga(12), one Ga(14), two equivalent Ga(17), two equivalent Ga(2), and two equivalent Ga(8) atoms. The Pd(3)-Ga(12) bond length is 2.56 Å. The Pd(3)-Ga(14) bond length is 2.59 Å. Both Pd(3)-Ga(17) bond lengths are 2.86 Å. Both Pd(3)-Ga(2) bond lengths are 2.73 Å. Both Pd(3)-Ga(8) bond lengths are 2.74 Å. There are nineteen inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 10-coordinate geometry to one Tb(1), one Tb(3), two equivalent Tb(6), two equivalent Pd(2), one Ga(10), one Ga(18), and two equivalent Ga(11) atoms. The Ga(1)-Ga(10) bond length is 2.72 Å. The Ga(1)-Ga(18) bond length is 2.72 Å. Both Ga(1)-Ga(11) bond lengths are 2.58 Å. In the second Ga site, Ga(2) is bonded in a 10-coordinate geometry to one Tb(2), one Tb(4), two equivalent Tb(5), two equivalent Pd(3), one Ga(17), one Ga(9), and two equivalent Ga(12) atoms. The Ga(2)-Ga(17) bond length is 2.69 Å. The Ga(2)-Ga(9) bond length is 2.73 Å. Both Ga(2)-Ga(12) bond lengths are 2.61 Å. In the third Ga site, Ga(3) is bonded in a 10-coordinate geometry to one Tb(1), one Tb(5), two equivalent Tb(4), one Ga(12), one Ga(17), two equivalent Ga(19), and two equivalent Ga(9) atoms. The Ga(3)-Ga(12) bond length is 2.69 Å. The Ga(3)-Ga(17) bond length is 2.90 Å. Both Ga(3)-Ga(19) bond lengths are 2.76 Å. Both Ga(3)-Ga(9) bond lengths are 2.63 Å. In the fourth Ga site, Ga(4) is bonded in a 10-coordinate geometry to one Tb(2), one Tb(6), two equivalent Tb(3), two equivalent Pd(1), one Ga(11), one Ga(18), and two equivalent Ga(10) atoms. The Ga(4)-Ga(11) bond length is 2.72 Å. The Ga(4)-Ga(18) bond length is 2.72 Å. Both Ga(4)-Ga(10) bond lengths are 2.59 Å. In the fifth Ga site, Ga(5) is bonded in a 10-coordinate geometry to one Tb(1), one Tb(3), two equivalent Tb(5), one Ga(13), one Ga(17), two equivalent Ga(15), and two equivalent Ga(19) atoms. The Ga(5)-Ga(13) bond length is 2.67 Å. The Ga(5)-Ga(17) bond length is 2.93 Å. Both Ga(5)-Ga(15) bond lengths are 2.63 Å. Both Ga(5)-Ga(19) bond lengths are 2.78 Å. In the sixth Ga site, Ga(6) is bonded in a 10-coordinate geometry to one Tb(2), one Tb(4), two equivalent Tb(6), two equivalent Pd(1), one Ga(14), one Ga(18), and two equivalent Ga(16) atoms. The Ga(6)-Ga(14) bond length is 2.69 Å. The Ga(6)-Ga(18) bond length is 2.73 Å. Both Ga(6)-Ga(16) bond lengths are 2.61 Å. In the seventh Ga site, Ga(7) is bonded in a 10-coordinate geometry to one Tb(1), one Tb(5), two equivalent Tb(3), two equivalent Pd(2), one Ga(15), one Ga(18), and two equivalent Ga(13) atoms. The Ga(7)-Ga(15) bond length is 2.72 Å. The Ga(7)-Ga(18) bond length is 2.72 Å. Both Ga(7)-Ga(13) bond lengths are 2.61 Å. In the eighth Ga site, Ga(8) is bonded in a 10-coordinate geometry to one Tb(2), one Tb(6), two equivalent Tb(4), two equivalent Pd(3), one Ga(16), one Ga(17), and two equivalent Ga(14) atoms. The Ga(8)-Ga(16) bond length is 2.71 Å. The Ga(8)-Ga(17) bond length is 2.71 Å. Both Ga(8)-Ga(14) bond lengths are 2.60 Å. In the ninth Ga site, Ga(9) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(5), one Ga(13), one Ga(19), one Ga(2), and two equivalent Ga(3) atoms. The Ga(9)-Ga(13) bond length is 2.54 Å. The Ga(9)-Ga(19) bond length is 2.62 Å. In the tenth Ga site, Ga(10) is bonded in a 9-coordinate geometry to two equivalent Tb(2), two equivalent Tb(6), one Pd(1), one Ga(1), one Ga(14), and two equivalent Ga(4) atoms. The Ga(10)-Ga(14) bond length is 2.55 Å. In the eleventh Ga site, Ga(11) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), one Pd(2), one Ga(15), one Ga(4), and two equivalent Ga(1) atoms. The Ga(11)-Ga(15) bond length is 2.56 Å. In the twelfth Ga site, Ga(12) is bonded in a 9-coordinate geometry to two equivalent Tb(2), two equivalent Tb(4), one Pd(3), one Ga(16), one Ga(3), and two equivalent Ga(2) atoms. The Ga(12)-Ga(16) bond length is 2.53 Å. In the thirteenth Ga site, Ga(13) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(5), one Pd(2), one Ga(5), one Ga(9), and two equivalent Ga(7) atoms. In the fourteenth Ga site, Ga(14) is bonded in a 9-coordinate geometry to two equivalent Tb(2), two equivalent Tb(6), one Pd(3), one Ga(10), one Ga(6), and two equivalent Ga(8) atoms. In the fifteenth Ga site, Ga(15) is bonded in a 9-coordinate geometry to two equivalent Tb(1), two equivalent Tb(3), one Ga(11), one Ga(19), one Ga(7), and two equivalent Ga(5) atoms. The Ga(15)-Ga(19) bond length is 2.64 Å. In the sixteenth Ga site, Ga(16) is bonded in a 9-coordinate geometry to two equivalent Tb(2), two equivalent Tb(4), one Pd(1), one Ga(12), one Ga(8), and two equivalent Ga(6) atoms. In the seventeenth Ga site, Ga(17) is bonded to two equivalent Tb(4), two equivalent Tb(5), two equivalent Pd(3), one Ga(2), one Ga(3), one Ga(5), one Ga(8), and two equivalent Ga(19) atoms to form distorted GaTb4Ga6Pd2 cuboctahedra that share corners with two equivalent Tb(1)Ga14 cuboctahedra,  an edgeedge with one Tb(2)Ga12 cuboctahedra,  a faceface with one Tb(1)Ga14 cuboctahedra, and faces with two equivalent Ga(17)Tb4Ga6Pd2 cuboctahedra. Both Ga(17)-Ga(19) bond lengths are 3.01 Å. In the eighteenth Ga site, Ga(18) is bonded to two equivalent Tb(3), two equivalent Tb(6), two equivalent Pd(1), two equivalent Pd(2), one Ga(1), one Ga(4), one Ga(6), and one Ga(7) atom to form GaTb4Ga4Pd4 cuboctahedra that share  an edgeedge with one Tb(2)Ga12 cuboctahedra,  an edgeedge with one Tb(1)Ga14 cuboctahedra, and faces with two equivalent Ga(18)Tb4Ga4Pd4 cuboctahedra. In the nineteenth Ga site, Ga(19) is bonded in a 12-coordinate geometry to one Tb(4), one Tb(5), two equivalent Tb(1), one Ga(15), one Ga(9), two equivalent Ga(17), two equivalent Ga(3), and two equivalent Ga(5) atoms.