Tm4Ni10Ga21 crystallizes in the monoclinic C2/m space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded in a 15-coordinate geometry to two equivalent Ni(1), two equivalent Ni(3), one Ga(4), one Ga(6), one Ga(8), one Ga(9), two equivalent Ga(1), two equivalent Ga(11), and three equivalent Ga(3) atoms. In the second Tm site, Tm(2) is bonded in a 14-coordinate geometry to two equivalent Ni(2), two equivalent Ni(4), one Ga(11), one Ga(7), one Ga(9), two equivalent Ga(5), two equivalent Ga(6), and three equivalent Ga(2) atoms. There are five inequivalent Ni sites. In the first Ni site, Ni(4) is bonded in a 10-coordinate geometry to two equivalent Tm(2), one Ni(1), one Ga(5), one Ga(7), two equivalent Ga(9), and three equivalent Ga(2) atoms. In the second Ni site, Ni(5) is bonded in a 9-coordinate geometry to one Ga(9), two equivalent Ga(1), two equivalent Ga(10), two equivalent Ga(4), and two equivalent Ga(5) atoms. In the third Ni site, Ni(1) is bonded in a 10-coordinate geometry to two equivalent Tm(1), one Ni(4), one Ga(1), one Ga(11), one Ga(7), two equivalent Ga(8), and two equivalent Ga(9) atoms. In the fourth Ni site, Ni(2) is bonded in a 10-coordinate geometry to two equivalent Tm(2), one Ga(2), one Ga(6), two equivalent Ga(11), two equivalent Ga(7), and two equivalent Ga(8) atoms. In the fifth Ni site, Ni(3) is bonded in a 9-coordinate geometry to two equivalent Tm(1), one Ga(11), one Ga(4), two equivalent Ga(6), and three equivalent Ga(3) atoms. There are eleven inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 5-coordinate geometry to two equivalent Tm(1), one Ni(1), two equivalent Ni(5), one Ga(10), and one Ga(3) atom. In the second Ga site, Ga(2) is bonded in a 12-coordinate geometry to three equivalent Tm(2), one Ni(2), three equivalent Ni(4), one Ga(9), two equivalent Ga(2), and two equivalent Ga(7) atoms. In the third Ga site, Ga(3) is bonded in a 12-coordinate geometry to three equivalent Tm(1), three equivalent Ni(3), one Ga(1), one Ga(6), two equivalent Ga(3), and two equivalent Ga(4) atoms. In the fourth Ga site, Ga(4) is bonded in a 3-coordinate geometry to one Tm(1), one Ni(3), two equivalent Ni(5), two equivalent Ga(10), and two equivalent Ga(3) atoms. In the fifth Ga site, Ga(5) is bonded in a 5-coordinate geometry to two equivalent Tm(2), one Ni(4), two equivalent Ni(5), one Ga(10), and one Ga(6) atom. In the sixth Ga site, Ga(6) is bonded in a 10-coordinate geometry to one Tm(1), two equivalent Tm(2), one Ni(2), two equivalent Ni(3), one Ga(3), one Ga(5), and two equivalent Ga(11) atoms. In the seventh Ga site, Ga(7) is bonded in a 10-coordinate geometry to one Tm(2), one Ni(1), one Ni(4), two equivalent Ni(2), one Ga(11), two equivalent Ga(2), and two equivalent Ga(8) atoms. In the eighth Ga site, Ga(8) is bonded in a 11-coordinate geometry to one Tm(1), two equivalent Ni(1), two equivalent Ni(2), one Ga(8), one Ga(9), two equivalent Ga(11), and two equivalent Ga(7) atoms. In the ninth Ga site, Ga(9) is bonded in a 5-coordinate geometry to one Tm(1), one Tm(2), one Ni(5), two equivalent Ni(1), two equivalent Ni(4), one Ga(2), and one Ga(8) atom. In the tenth Ga site, Ga(10) is bonded in a 12-coordinate geometry to four equivalent Ni(5), two equivalent Ga(1), two equivalent Ga(5), and four equivalent Ga(4) atoms. In the eleventh Ga site, Ga(11) is bonded in a 12-coordinate geometry to one Tm(2), two equivalent Tm(1), one Ni(1), one Ni(3), two equivalent Ni(2), one Ga(7), two equivalent Ga(6), and two equivalent Ga(8) atoms.
Tm4Ni10Ga21 crystallizes in the monoclinic C2/m space group. There are two inequivalent Tm sites. In the first Tm site, Tm(1) is bonded in a 15-coordinate geometry to two equivalent Ni(1), two equivalent Ni(3), one Ga(4), one Ga(6), one Ga(8), one Ga(9), two equivalent Ga(1), two equivalent Ga(11), and three equivalent Ga(3) atoms. Both Tm(1)-Ni(1) bond lengths are 3.03 Å. Both Tm(1)-Ni(3) bond lengths are 3.08 Å. The Tm(1)-Ga(4) bond length is 3.43 Å. The Tm(1)-Ga(6) bond length is 3.02 Å. The Tm(1)-Ga(8) bond length is 3.14 Å. The Tm(1)-Ga(9) bond length is 3.20 Å. Both Tm(1)-Ga(1) bond lengths are 2.86 Å. Both Tm(1)-Ga(11) bond lengths are 2.99 Å. There are two shorter (2.99 Å) and one longer (3.11 Å) Tm(1)-Ga(3) bond length. In the second Tm site, Tm(2) is bonded in a 14-coordinate geometry to two equivalent Ni(2), two equivalent Ni(4), one Ga(11), one Ga(7), one Ga(9), two equivalent Ga(5), two equivalent Ga(6), and three equivalent Ga(2) atoms. Both Tm(2)-Ni(2) bond lengths are 3.12 Å. Both Tm(2)-Ni(4) bond lengths are 3.03 Å. The Tm(2)-Ga(11) bond length is 3.15 Å. The Tm(2)-Ga(7) bond length is 3.01 Å. The Tm(2)-Ga(9) bond length is 3.21 Å. Both Tm(2)-Ga(5) bond lengths are 2.91 Å. Both Tm(2)-Ga(6) bond lengths are 2.95 Å. There are two shorter (2.98 Å) and one longer (3.12 Å) Tm(2)-Ga(2) bond length. There are five inequivalent Ni sites. In the first Ni site, Ni(4) is bonded in a 10-coordinate geometry to two equivalent Tm(2), one Ni(1), one Ga(5), one Ga(7), two equivalent Ga(9), and three equivalent Ga(2) atoms. The Ni(4)-Ni(1) bond length is 2.77 Å. The Ni(4)-Ga(5) bond length is 2.48 Å. The Ni(4)-Ga(7) bond length is 2.47 Å. Both Ni(4)-Ga(9) bond lengths are 2.56 Å. There is one shorter (2.51 Å) and two longer (2.53 Å) Ni(4)-Ga(2) bond lengths. In the second Ni site, Ni(5) is bonded in a 9-coordinate geometry to one Ga(9), two equivalent Ga(1), two equivalent Ga(10), two equivalent Ga(4), and two equivalent Ga(5) atoms. The Ni(5)-Ga(9) bond length is 2.56 Å. Both Ni(5)-Ga(1) bond lengths are 2.58 Å. Both Ni(5)-Ga(10) bond lengths are 2.48 Å. There is one shorter (2.50 Å) and one longer (2.58 Å) Ni(5)-Ga(4) bond length. Both Ni(5)-Ga(5) bond lengths are 2.60 Å. In the third Ni site, Ni(1) is bonded in a 10-coordinate geometry to two equivalent Tm(1), one Ni(4), one Ga(1), one Ga(11), one Ga(7), two equivalent Ga(8), and two equivalent Ga(9) atoms. The Ni(1)-Ga(1) bond length is 2.47 Å. The Ni(1)-Ga(11) bond length is 2.52 Å. The Ni(1)-Ga(7) bond length is 2.41 Å. Both Ni(1)-Ga(8) bond lengths are 2.53 Å. Both Ni(1)-Ga(9) bond lengths are 2.56 Å. In the fourth Ni site, Ni(2) is bonded in a 10-coordinate geometry to two equivalent Tm(2), one Ga(2), one Ga(6), two equivalent Ga(11), two equivalent Ga(7), and two equivalent Ga(8) atoms. The Ni(2)-Ga(2) bond length is 2.63 Å. The Ni(2)-Ga(6) bond length is 2.53 Å. Both Ni(2)-Ga(11) bond lengths are 2.51 Å. Both Ni(2)-Ga(7) bond lengths are 2.48 Å. There is one shorter (2.53 Å) and one longer (2.82 Å) Ni(2)-Ga(8) bond length. In the fifth Ni site, Ni(3) is bonded in a 9-coordinate geometry to two equivalent Tm(1), one Ga(11), one Ga(4), two equivalent Ga(6), and three equivalent Ga(3) atoms. The Ni(3)-Ga(11) bond length is 2.59 Å. The Ni(3)-Ga(4) bond length is 2.38 Å. Both Ni(3)-Ga(6) bond lengths are 2.46 Å. There are two shorter (2.49 Å) and one longer (2.51 Å) Ni(3)-Ga(3) bond length. There are eleven inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 5-coordinate geometry to two equivalent Tm(1), one Ni(1), two equivalent Ni(5), one Ga(10), and one Ga(3) atom. The Ga(1)-Ga(10) bond length is 2.61 Å. The Ga(1)-Ga(3) bond length is 2.82 Å. In the second Ga site, Ga(2) is bonded in a 12-coordinate geometry to three equivalent Tm(2), one Ni(2), three equivalent Ni(4), one Ga(9), two equivalent Ga(2), and two equivalent Ga(7) atoms. The Ga(2)-Ga(9) bond length is 2.89 Å. Both Ga(2)-Ga(2) bond lengths are 2.89 Å. Both Ga(2)-Ga(7) bond lengths are 2.86 Å. In the third Ga site, Ga(3) is bonded in a 12-coordinate geometry to three equivalent Tm(1), three equivalent Ni(3), one Ga(1), one Ga(6), two equivalent Ga(3), and two equivalent Ga(4) atoms. The Ga(3)-Ga(6) bond length is 2.72 Å. Both Ga(3)-Ga(3) bond lengths are 2.88 Å. Both Ga(3)-Ga(4) bond lengths are 3.04 Å. In the fourth Ga site, Ga(4) is bonded in a 3-coordinate geometry to one Tm(1), one Ni(3), two equivalent Ni(5), two equivalent Ga(10), and two equivalent Ga(3) atoms. Both Ga(4)-Ga(10) bond lengths are 2.91 Å. In the fifth Ga site, Ga(5) is bonded in a 5-coordinate geometry to two equivalent Tm(2), one Ni(4), two equivalent Ni(5), one Ga(10), and one Ga(6) atom. The Ga(5)-Ga(10) bond length is 2.70 Å. The Ga(5)-Ga(6) bond length is 2.83 Å. In the sixth Ga site, Ga(6) is bonded in a 10-coordinate geometry to one Tm(1), two equivalent Tm(2), one Ni(2), two equivalent Ni(3), one Ga(3), one Ga(5), and two equivalent Ga(11) atoms. Both Ga(6)-Ga(11) bond lengths are 2.90 Å. In the seventh Ga site, Ga(7) is bonded in a 10-coordinate geometry to one Tm(2), one Ni(1), one Ni(4), two equivalent Ni(2), one Ga(11), two equivalent Ga(2), and two equivalent Ga(8) atoms. The Ga(7)-Ga(11) bond length is 2.84 Å. Both Ga(7)-Ga(8) bond lengths are 2.76 Å. In the eighth Ga site, Ga(8) is bonded in a 11-coordinate geometry to one Tm(1), two equivalent Ni(1), two equivalent Ni(2), one Ga(8), one Ga(9), two equivalent Ga(11), and two equivalent Ga(7) atoms. The Ga(8)-Ga(8) bond length is 2.67 Å. The Ga(8)-Ga(9) bond length is 2.87 Å. Both Ga(8)-Ga(11) bond lengths are 2.92 Å. In the ninth Ga site, Ga(9) is bonded in a 5-coordinate geometry to one Tm(1), one Tm(2), one Ni(5), two equivalent Ni(1), two equivalent Ni(4), one Ga(2), and one Ga(8) atom. In the tenth Ga site, Ga(10) is bonded in a 12-coordinate geometry to four equivalent Ni(5), two equivalent Ga(1), two equivalent Ga(5), and four equivalent Ga(4) atoms. In the eleventh Ga site, Ga(11) is bonded in a 12-coordinate geometry to one Tm(2), two equivalent Tm(1), one Ni(1), one Ni(3), two equivalent Ni(2), one Ga(7), two equivalent Ga(6), and two equivalent Ga(8) atoms.