La5Ga4SnSb10 crystallizes in the triclinic P1 space group. There are ten inequivalent La sites. In the first La site, La(1) is bonded in a 10-coordinate geometry to one Ga(1), one Ga(7), one Sb(1), one Sb(5), two equivalent Sb(10), two equivalent Sb(16), and two equivalent Sb(20) atoms. In the second La site, La(2) is bonded in a 10-coordinate geometry to one Ga(2), one Ga(8), one Sb(4), one Sb(5), two equivalent Sb(19), two equivalent Sb(20), and two equivalent Sb(9) atoms. In the third La site, La(3) is bonded in a 10-coordinate geometry to one Ga(3), one Sn(1), one Sb(3), one Sb(4), two equivalent Sb(18), two equivalent Sb(19), and two equivalent Sb(8) atoms. In the fourth La site, La(4) is bonded in a 10-coordinate geometry to one Ga(4), one Sn(2), one Sb(2), one Sb(3), two equivalent Sb(17), two equivalent Sb(18), and two equivalent Sb(7) atoms. In the fifth La site, La(5) is bonded in a 10-coordinate geometry to one Ga(5), one Ga(6), one Sb(1), one Sb(2), two equivalent Sb(16), two equivalent Sb(17), and two equivalent Sb(6) atoms. In the sixth La site, La(6) is bonded in a 10-coordinate geometry to one Ga(1), one Ga(7), one Sb(10), one Sb(9), two equivalent Sb(14), two equivalent Sb(15), and two equivalent Sb(5) atoms. In the seventh La site, La(7) is bonded in a 10-coordinate geometry to one Ga(2), one Ga(8), one Sb(8), one Sb(9), two equivalent Sb(13), two equivalent Sb(14), and two equivalent Sb(4) atoms. In the eighth La site, La(8) is bonded in a 10-coordinate geometry to one Ga(3), one Sn(1), one Sb(7), one Sb(8), two equivalent Sb(12), two equivalent Sb(13), and two equivalent Sb(3) atoms. In the ninth La site, La(9) is bonded in a 10-coordinate geometry to one Ga(4), one Sn(2), one Sb(6), one Sb(7), two equivalent Sb(11), two equivalent Sb(12), and two equivalent Sb(2) atoms. In the tenth La site, La(10) is bonded in a 10-coordinate geometry to one Ga(5), one Ga(6), one Sb(10), one Sb(6), two equivalent Sb(1), two equivalent Sb(11), and two equivalent Sb(15) atoms. There are eight inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 6-coordinate geometry to one La(1), one La(6), two equivalent Ga(7), one Sb(15), and one Sb(16) atom. In the second Ga site, Ga(2) is bonded in a 6-coordinate geometry to one La(2), one La(7), two equivalent Ga(8), one Sb(14), and one Sb(20) atom. In the third Ga site, Ga(3) is bonded in a 6-coordinate geometry to one La(3), one La(8), two equivalent Sn(1), one Sb(13), and one Sb(19) atom. In the fourth Ga site, Ga(4) is bonded in a 6-coordinate geometry to one La(4), one La(9), two equivalent Sn(2), one Sb(12), and one Sb(18) atom. In the fifth Ga site, Ga(5) is bonded in a 6-coordinate geometry to one La(10), one La(5), two equivalent Ga(6), one Sb(11), and one Sb(17) atom. In the sixth Ga site, Ga(6) is bonded in a 6-coordinate geometry to one La(10), one La(5), two equivalent Ga(5), one Sb(15), and one Sb(16) atom. In the seventh Ga site, Ga(7) is bonded in a 6-coordinate geometry to one La(1), one La(6), two equivalent Ga(1), one Sb(14), and one Sb(20) atom. In the eighth Ga site, Ga(8) is bonded in a 6-coordinate geometry to one La(2), one La(7), two equivalent Ga(2), one Sb(13), and one Sb(19) atom. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 6-coordinate geometry to one La(3), one La(8), two equivalent Ga(3), one Sb(12), and one Sb(18) atom. In the second Sn site, Sn(2) is bonded in a 6-coordinate geometry to one La(4), one La(9), two equivalent Ga(4), one Sb(11), and one Sb(17) atom. There are twenty inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 8-coordinate geometry to one La(1), one La(5), two equivalent La(10), two equivalent Sb(10), and two equivalent Sb(6) atoms. In the second Sb site, Sb(2) is bonded in a 8-coordinate geometry to one La(4), one La(5), two equivalent La(9), two equivalent Sb(6), and two equivalent Sb(7) atoms. In the third Sb site, Sb(3) is bonded in a 8-coordinate geometry to one La(3), one La(4), two equivalent La(8), two equivalent Sb(7), and two equivalent Sb(8) atoms. In the fourth Sb site, Sb(4) is bonded in a 8-coordinate geometry to one La(2), one La(3), two equivalent La(7), two equivalent Sb(8), and two equivalent Sb(9) atoms. In the fifth Sb site, Sb(5) is bonded in a 8-coordinate geometry to one La(1), one La(2), two equivalent La(6), two equivalent Sb(10), and two equivalent Sb(9) atoms. In the sixth Sb site, Sb(6) is bonded in a 8-coordinate geometry to one La(10), one La(9), two equivalent La(5), two equivalent Sb(1), and two equivalent Sb(2) atoms. In the seventh Sb site, Sb(7) is bonded in a 8-coordinate geometry to one La(8), one La(9), two equivalent La(4), two equivalent Sb(2), and two equivalent Sb(3) atoms. In the eighth Sb site, Sb(8) is bonded in a 8-coordinate geometry to one La(7), one La(8), two equivalent La(3), two equivalent Sb(3), and two equivalent Sb(4) atoms. In the ninth Sb site, Sb(9) is bonded in a 8-coordinate geometry to one La(6), one La(7), two equivalent La(2), two equivalent Sb(4), and two equivalent Sb(5) atoms. In the tenth Sb site, Sb(10) is bonded in a 8-coordinate geometry to one La(10), one La(6), two equivalent La(1), two equivalent Sb(1), and two equivalent Sb(5) atoms. In the eleventh Sb site, Sb(11) is bonded to two equivalent La(10), two equivalent La(9), one Ga(5), and one Sn(2) atom to form distorted SbLa4GaSn pentagonal pyramids that share corners with two equivalent Sb(15)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(12)La4GaSn pentagonal pyramids, corners with two equivalent Sb(17)La4GaSn pentagonal pyramids,  an edgeedge with one Sb(15)La4Ga2 pentagonal pyramid,  an edgeedge with one Sb(12)La4GaSn pentagonal pyramid, and edges with two equivalent Sb(11)La4GaSn pentagonal pyramids. In the twelfth Sb site, Sb(12) is bonded to two equivalent La(8), two equivalent La(9), one Ga(4), and one Sn(1) atom to form distorted SbLa4GaSn pentagonal pyramids that share corners with two equivalent Sb(13)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(11)La4GaSn pentagonal pyramids, corners with two equivalent Sb(18)La4GaSn pentagonal pyramids,  an edgeedge with one Sb(13)La4Ga2 pentagonal pyramid,  an edgeedge with one Sb(11)La4GaSn pentagonal pyramid, and edges with two equivalent Sb(12)La4GaSn pentagonal pyramids. In the thirteenth Sb site, Sb(13) is bonded to two equivalent La(7), two equivalent La(8), one Ga(3), and one Ga(8) atom to form distorted SbLa4Ga2 pentagonal pyramids that share corners with two equivalent Sb(14)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(19)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(12)La4GaSn pentagonal pyramids,  an edgeedge with one Sb(14)La4Ga2 pentagonal pyramid,  an edgeedge with one Sb(12)La4GaSn pentagonal pyramid, and edges with two equivalent Sb(13)La4Ga2 pentagonal pyramids. In the fourteenth Sb site, Sb(14) is bonded to two equivalent La(6), two equivalent La(7), one Ga(2), and one Ga(7) atom to form a mixture of distorted corner and edge-sharing SbLa4Ga2 pentagonal pyramids. In the fifteenth Sb site, Sb(15) is bonded to two equivalent La(10), two equivalent La(6), one Ga(1), and one Ga(6) atom to form distorted SbLa4Ga2 pentagonal pyramids that share corners with two equivalent Sb(14)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(16)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(11)La4GaSn pentagonal pyramids,  an edgeedge with one Sb(14)La4Ga2 pentagonal pyramid,  an edgeedge with one Sb(11)La4GaSn pentagonal pyramid, and edges with two equivalent Sb(15)La4Ga2 pentagonal pyramids. In the sixteenth Sb site, Sb(16) is bonded to two equivalent La(1), two equivalent La(5), one Ga(1), and one Ga(6) atom to form distorted SbLa4Ga2 pentagonal pyramids that share corners with two equivalent Sb(15)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(20)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(17)La4GaSn pentagonal pyramids,  an edgeedge with one Sb(20)La4Ga2 pentagonal pyramid,  an edgeedge with one Sb(17)La4GaSn pentagonal pyramid, and edges with two equivalent Sb(16)La4Ga2 pentagonal pyramids. In the seventeenth Sb site, Sb(17) is bonded to two equivalent La(4), two equivalent La(5), one Ga(5), and one Sn(2) atom to form distorted SbLa4GaSn pentagonal pyramids that share corners with two equivalent Sb(16)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(11)La4GaSn pentagonal pyramids, corners with two equivalent Sb(18)La4GaSn pentagonal pyramids,  an edgeedge with one Sb(16)La4Ga2 pentagonal pyramid,  an edgeedge with one Sb(18)La4GaSn pentagonal pyramid, and edges with two equivalent Sb(17)La4GaSn pentagonal pyramids. In the eighteenth Sb site, Sb(18) is bonded to two equivalent La(3), two equivalent La(4), one Ga(4), and one Sn(1) atom to form distorted SbLa4GaSn pentagonal pyramids that share corners with two equivalent Sb(19)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(12)La4GaSn pentagonal pyramids, corners with two equivalent Sb(17)La4GaSn pentagonal pyramids,  an edgeedge with one Sb(19)La4Ga2 pentagonal pyramid,  an edgeedge with one Sb(17)La4GaSn pentagonal pyramid, and edges with two equivalent Sb(18)La4GaSn pentagonal pyramids. In the nineteenth Sb site, Sb(19) is bonded to two equivalent La(2), two equivalent La(3), one Ga(3), and one Ga(8) atom to form distorted SbLa4Ga2 pentagonal pyramids that share corners with two equivalent Sb(13)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(20)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(18)La4GaSn pentagonal pyramids,  an edgeedge with one Sb(20)La4Ga2 pentagonal pyramid,  an edgeedge with one Sb(18)La4GaSn pentagonal pyramid, and edges with two equivalent Sb(19)La4Ga2 pentagonal pyramids. In the twentieth Sb site, Sb(20) is bonded to two equivalent La(1), two equivalent La(2), one Ga(2), and one Ga(7) atom to form a mixture of distorted corner and edge-sharing SbLa4Ga2 pentagonal pyramids.
La5Ga4SnSb10 crystallizes in the triclinic P1 space group. There are ten inequivalent La sites. In the first La site, La(1) is bonded in a 10-coordinate geometry to one Ga(1), one Ga(7), one Sb(1), one Sb(5), two equivalent Sb(10), two equivalent Sb(16), and two equivalent Sb(20) atoms. The La(1)-Ga(1) bond length is 3.45 Å. The La(1)-Ga(7) bond length is 3.45 Å. The La(1)-Sb(1) bond length is 3.42 Å. The La(1)-Sb(5) bond length is 3.41 Å. There is one shorter (3.41 Å) and one longer (3.43 Å) La(1)-Sb(10) bond length. There is one shorter (3.35 Å) and one longer (3.36 Å) La(1)-Sb(16) bond length. Both La(1)-Sb(20) bond lengths are 3.35 Å. In the second La site, La(2) is bonded in a 10-coordinate geometry to one Ga(2), one Ga(8), one Sb(4), one Sb(5), two equivalent Sb(19), two equivalent Sb(20), and two equivalent Sb(9) atoms. The La(2)-Ga(2) bond length is 3.46 Å. The La(2)-Ga(8) bond length is 3.45 Å. The La(2)-Sb(4) bond length is 3.42 Å. The La(2)-Sb(5) bond length is 3.40 Å. Both La(2)-Sb(19) bond lengths are 3.35 Å. There is one shorter (3.33 Å) and one longer (3.34 Å) La(2)-Sb(20) bond length. Both La(2)-Sb(9) bond lengths are 3.42 Å. In the third La site, La(3) is bonded in a 10-coordinate geometry to one Ga(3), one Sn(1), one Sb(3), one Sb(4), two equivalent Sb(18), two equivalent Sb(19), and two equivalent Sb(8) atoms. The La(3)-Ga(3) bond length is 3.57 Å. The La(3)-Sn(1) bond length is 3.51 Å. The La(3)-Sb(3) bond length is 3.38 Å. The La(3)-Sb(4) bond length is 3.37 Å. There is one shorter (3.35 Å) and one longer (3.39 Å) La(3)-Sb(18) bond length. Both La(3)-Sb(19) bond lengths are 3.34 Å. Both La(3)-Sb(8) bond lengths are 3.39 Å. In the fourth La site, La(4) is bonded in a 10-coordinate geometry to one Ga(4), one Sn(2), one Sb(2), one Sb(3), two equivalent Sb(17), two equivalent Sb(18), and two equivalent Sb(7) atoms. The La(4)-Ga(4) bond length is 3.57 Å. The La(4)-Sn(2) bond length is 3.52 Å. The La(4)-Sb(2) bond length is 3.34 Å. The La(4)-Sb(3) bond length is 3.39 Å. There is one shorter (3.33 Å) and one longer (3.35 Å) La(4)-Sb(17) bond length. There is one shorter (3.32 Å) and one longer (3.34 Å) La(4)-Sb(18) bond length. There is one shorter (3.37 Å) and one longer (3.40 Å) La(4)-Sb(7) bond length. In the fifth La site, La(5) is bonded in a 10-coordinate geometry to one Ga(5), one Ga(6), one Sb(1), one Sb(2), two equivalent Sb(16), two equivalent Sb(17), and two equivalent Sb(6) atoms. The La(5)-Ga(5) bond length is 3.46 Å. The La(5)-Ga(6) bond length is 3.46 Å. The La(5)-Sb(1) bond length is 3.39 Å. The La(5)-Sb(2) bond length is 3.41 Å. There is one shorter (3.32 Å) and one longer (3.33 Å) La(5)-Sb(16) bond length. There is one shorter (3.31 Å) and one longer (3.33 Å) La(5)-Sb(17) bond length. There is one shorter (3.39 Å) and one longer (3.43 Å) La(5)-Sb(6) bond length. In the sixth La site, La(6) is bonded in a 10-coordinate geometry to one Ga(1), one Ga(7), one Sb(10), one Sb(9), two equivalent Sb(14), two equivalent Sb(15), and two equivalent Sb(5) atoms. The La(6)-Ga(1) bond length is 3.45 Å. The La(6)-Ga(7) bond length is 3.45 Å. The La(6)-Sb(10) bond length is 3.42 Å. The La(6)-Sb(9) bond length is 3.41 Å. Both La(6)-Sb(14) bond lengths are 3.35 Å. Both La(6)-Sb(15) bond lengths are 3.35 Å. There is one shorter (3.42 Å) and one longer (3.43 Å) La(6)-Sb(5) bond length. In the seventh La site, La(7) is bonded in a 10-coordinate geometry to one Ga(2), one Ga(8), one Sb(8), one Sb(9), two equivalent Sb(13), two equivalent Sb(14), and two equivalent Sb(4) atoms. The La(7)-Ga(2) bond length is 3.45 Å. The La(7)-Ga(8) bond length is 3.45 Å. The La(7)-Sb(8) bond length is 3.40 Å. The La(7)-Sb(9) bond length is 3.41 Å. Both La(7)-Sb(13) bond lengths are 3.35 Å. Both La(7)-Sb(14) bond lengths are 3.33 Å. Both La(7)-Sb(4) bond lengths are 3.42 Å. In the eighth La site, La(8) is bonded in a 10-coordinate geometry to one Ga(3), one Sn(1), one Sb(7), one Sb(8), two equivalent Sb(12), two equivalent Sb(13), and two equivalent Sb(3) atoms. The La(8)-Ga(3) bond length is 3.56 Å. The La(8)-Sn(1) bond length is 3.50 Å. The La(8)-Sb(7) bond length is 3.37 Å. The La(8)-Sb(8) bond length is 3.37 Å. There is one shorter (3.34 Å) and one longer (3.39 Å) La(8)-Sb(12) bond length. There is one shorter (3.34 Å) and one longer (3.35 Å) La(8)-Sb(13) bond length. There is one shorter (3.38 Å) and one longer (3.39 Å) La(8)-Sb(3) bond length. In the ninth La site, La(9) is bonded in a 10-coordinate geometry to one Ga(4), one Sn(2), one Sb(6), one Sb(7), two equivalent Sb(11), two equivalent Sb(12), and two equivalent Sb(2) atoms. The La(9)-Ga(4) bond length is 3.57 Å. The La(9)-Sn(2) bond length is 3.52 Å. The La(9)-Sb(6) bond length is 3.36 Å. The La(9)-Sb(7) bond length is 3.38 Å. There is one shorter (3.32 Å) and one longer (3.35 Å) La(9)-Sb(11) bond length. There is one shorter (3.32 Å) and one longer (3.34 Å) La(9)-Sb(12) bond length. There is one shorter (3.36 Å) and one longer (3.40 Å) La(9)-Sb(2) bond length. In the tenth La site, La(10) is bonded in a 10-coordinate geometry to one Ga(5), one Ga(6), one Sb(10), one Sb(6), two equivalent Sb(1), two equivalent Sb(11), and two equivalent Sb(15) atoms. The La(10)-Ga(5) bond length is 3.46 Å. The La(10)-Ga(6) bond length is 3.46 Å. The La(10)-Sb(10) bond length is 3.39 Å. The La(10)-Sb(6) bond length is 3.43 Å. There is one shorter (3.39 Å) and one longer (3.43 Å) La(10)-Sb(1) bond length. There is one shorter (3.31 Å) and one longer (3.33 Å) La(10)-Sb(11) bond length. There is one shorter (3.32 Å) and one longer (3.33 Å) La(10)-Sb(15) bond length. There are eight inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 6-coordinate geometry to one La(1), one La(6), two equivalent Ga(7), one Sb(15), and one Sb(16) atom. There is one shorter (2.62 Å) and one longer (2.63 Å) Ga(1)-Ga(7) bond length. The Ga(1)-Sb(15) bond length is 2.80 Å. The Ga(1)-Sb(16) bond length is 2.81 Å. In the second Ga site, Ga(2) is bonded in a 6-coordinate geometry to one La(2), one La(7), two equivalent Ga(8), one Sb(14), and one Sb(20) atom. Both Ga(2)-Ga(8) bond lengths are 2.61 Å. The Ga(2)-Sb(14) bond length is 2.78 Å. The Ga(2)-Sb(20) bond length is 2.78 Å. In the third Ga site, Ga(3) is bonded in a 6-coordinate geometry to one La(3), one La(8), two equivalent Sn(1), one Sb(13), and one Sb(19) atom. Both Ga(3)-Sn(1) bond lengths are 2.78 Å. The Ga(3)-Sb(13) bond length is 2.70 Å. The Ga(3)-Sb(19) bond length is 2.70 Å. In the fourth Ga site, Ga(4) is bonded in a 6-coordinate geometry to one La(4), one La(9), two equivalent Sn(2), one Sb(12), and one Sb(18) atom. Both Ga(4)-Sn(2) bond lengths are 2.76 Å. The Ga(4)-Sb(12) bond length is 2.77 Å. The Ga(4)-Sb(18) bond length is 2.77 Å. In the fifth Ga site, Ga(5) is bonded in a 6-coordinate geometry to one La(10), one La(5), two equivalent Ga(6), one Sb(11), and one Sb(17) atom. There is one shorter (2.60 Å) and one longer (2.61 Å) Ga(5)-Ga(6) bond length. The Ga(5)-Sb(11) bond length is 2.89 Å. The Ga(5)-Sb(17) bond length is 2.90 Å. In the sixth Ga site, Ga(6) is bonded in a 6-coordinate geometry to one La(10), one La(5), two equivalent Ga(5), one Sb(15), and one Sb(16) atom. The Ga(6)-Sb(15) bond length is 2.79 Å. The Ga(6)-Sb(16) bond length is 2.78 Å. In the seventh Ga site, Ga(7) is bonded in a 6-coordinate geometry to one La(1), one La(6), two equivalent Ga(1), one Sb(14), and one Sb(20) atom. The Ga(7)-Sb(14) bond length is 2.81 Å. The Ga(7)-Sb(20) bond length is 2.81 Å. In the eighth Ga site, Ga(8) is bonded in a 6-coordinate geometry to one La(2), one La(7), two equivalent Ga(2), one Sb(13), and one Sb(19) atom. The Ga(8)-Sb(13) bond length is 2.87 Å. The Ga(8)-Sb(19) bond length is 2.87 Å. There are two inequivalent Sn sites. In the first Sn site, Sn(1) is bonded in a 6-coordinate geometry to one La(3), one La(8), two equivalent Ga(3), one Sb(12), and one Sb(18) atom. The Sn(1)-Sb(12) bond length is 2.94 Å. The Sn(1)-Sb(18) bond length is 2.93 Å. In the second Sn site, Sn(2) is bonded in a 6-coordinate geometry to one La(4), one La(9), two equivalent Ga(4), one Sb(11), and one Sb(17) atom. The Sn(2)-Sb(11) bond length is 2.89 Å. The Sn(2)-Sb(17) bond length is 2.89 Å. There are twenty inequivalent Sb sites. In the first Sb site, Sb(1) is bonded in a 8-coordinate geometry to one La(1), one La(5), two equivalent La(10), two equivalent Sb(10), and two equivalent Sb(6) atoms. There is one shorter (3.12 Å) and one longer (3.19 Å) Sb(1)-Sb(10) bond length. There is one shorter (3.11 Å) and one longer (3.18 Å) Sb(1)-Sb(6) bond length. In the second Sb site, Sb(2) is bonded in a 8-coordinate geometry to one La(4), one La(5), two equivalent La(9), two equivalent Sb(6), and two equivalent Sb(7) atoms. There is one shorter (3.12 Å) and one longer (3.20 Å) Sb(2)-Sb(6) bond length. There is one shorter (3.13 Å) and one longer (3.20 Å) Sb(2)-Sb(7) bond length. In the third Sb site, Sb(3) is bonded in a 8-coordinate geometry to one La(3), one La(4), two equivalent La(8), two equivalent Sb(7), and two equivalent Sb(8) atoms. There is one shorter (3.13 Å) and one longer (3.19 Å) Sb(3)-Sb(7) bond length. There is one shorter (3.14 Å) and one longer (3.19 Å) Sb(3)-Sb(8) bond length. In the fourth Sb site, Sb(4) is bonded in a 8-coordinate geometry to one La(2), one La(3), two equivalent La(7), two equivalent Sb(8), and two equivalent Sb(9) atoms. There is one shorter (3.13 Å) and one longer (3.17 Å) Sb(4)-Sb(8) bond length. There is one shorter (3.13 Å) and one longer (3.16 Å) Sb(4)-Sb(9) bond length. In the fifth Sb site, Sb(5) is bonded in a 8-coordinate geometry to one La(1), one La(2), two equivalent La(6), two equivalent Sb(10), and two equivalent Sb(9) atoms. There is one shorter (3.12 Å) and one longer (3.17 Å) Sb(5)-Sb(10) bond length. There is one shorter (3.13 Å) and one longer (3.18 Å) Sb(5)-Sb(9) bond length. In the sixth Sb site, Sb(6) is bonded in a 8-coordinate geometry to one La(10), one La(9), two equivalent La(5), two equivalent Sb(1), and two equivalent Sb(2) atoms. In the seventh Sb site, Sb(7) is bonded in a 8-coordinate geometry to one La(8), one La(9), two equivalent La(4), two equivalent Sb(2), and two equivalent Sb(3) atoms. In the eighth Sb site, Sb(8) is bonded in a 8-coordinate geometry to one La(7), one La(8), two equivalent La(3), two equivalent Sb(3), and two equivalent Sb(4) atoms. In the ninth Sb site, Sb(9) is bonded in a 8-coordinate geometry to one La(6), one La(7), two equivalent La(2), two equivalent Sb(4), and two equivalent Sb(5) atoms. In the tenth Sb site, Sb(10) is bonded in a 8-coordinate geometry to one La(10), one La(6), two equivalent La(1), two equivalent Sb(1), and two equivalent Sb(5) atoms. In the eleventh Sb site, Sb(11) is bonded to two equivalent La(10), two equivalent La(9), one Ga(5), and one Sn(2) atom to form distorted SbLa4GaSn pentagonal pyramids that share corners with two equivalent Sb(15)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(12)La4GaSn pentagonal pyramids, corners with two equivalent Sb(17)La4GaSn pentagonal pyramids,  an edgeedge with one Sb(15)La4Ga2 pentagonal pyramid,  an edgeedge with one Sb(12)La4GaSn pentagonal pyramid, and edges with two equivalent Sb(11)La4GaSn pentagonal pyramids. In the twelfth Sb site, Sb(12) is bonded to two equivalent La(8), two equivalent La(9), one Ga(4), and one Sn(1) atom to form distorted SbLa4GaSn pentagonal pyramids that share corners with two equivalent Sb(13)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(11)La4GaSn pentagonal pyramids, corners with two equivalent Sb(18)La4GaSn pentagonal pyramids,  an edgeedge with one Sb(13)La4Ga2 pentagonal pyramid,  an edgeedge with one Sb(11)La4GaSn pentagonal pyramid, and edges with two equivalent Sb(12)La4GaSn pentagonal pyramids. In the thirteenth Sb site, Sb(13) is bonded to two equivalent La(7), two equivalent La(8), one Ga(3), and one Ga(8) atom to form distorted SbLa4Ga2 pentagonal pyramids that share corners with two equivalent Sb(14)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(19)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(12)La4GaSn pentagonal pyramids,  an edgeedge with one Sb(14)La4Ga2 pentagonal pyramid,  an edgeedge with one Sb(12)La4GaSn pentagonal pyramid, and edges with two equivalent Sb(13)La4Ga2 pentagonal pyramids. In the fourteenth Sb site, Sb(14) is bonded to two equivalent La(6), two equivalent La(7), one Ga(2), and one Ga(7) atom to form a mixture of distorted corner and edge-sharing SbLa4Ga2 pentagonal pyramids. In the fifteenth Sb site, Sb(15) is bonded to two equivalent La(10), two equivalent La(6), one Ga(1), and one Ga(6) atom to form distorted SbLa4Ga2 pentagonal pyramids that share corners with two equivalent Sb(14)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(16)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(11)La4GaSn pentagonal pyramids,  an edgeedge with one Sb(14)La4Ga2 pentagonal pyramid,  an edgeedge with one Sb(11)La4GaSn pentagonal pyramid, and edges with two equivalent Sb(15)La4Ga2 pentagonal pyramids. In the sixteenth Sb site, Sb(16) is bonded to two equivalent La(1), two equivalent La(5), one Ga(1), and one Ga(6) atom to form distorted SbLa4Ga2 pentagonal pyramids that share corners with two equivalent Sb(15)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(20)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(17)La4GaSn pentagonal pyramids,  an edgeedge with one Sb(20)La4Ga2 pentagonal pyramid,  an edgeedge with one Sb(17)La4GaSn pentagonal pyramid, and edges with two equivalent Sb(16)La4Ga2 pentagonal pyramids. In the seventeenth Sb site, Sb(17) is bonded to two equivalent La(4), two equivalent La(5), one Ga(5), and one Sn(2) atom to form distorted SbLa4GaSn pentagonal pyramids that share corners with two equivalent Sb(16)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(11)La4GaSn pentagonal pyramids, corners with two equivalent Sb(18)La4GaSn pentagonal pyramids,  an edgeedge with one Sb(16)La4Ga2 pentagonal pyramid,  an edgeedge with one Sb(18)La4GaSn pentagonal pyramid, and edges with two equivalent Sb(17)La4GaSn pentagonal pyramids. In the eighteenth Sb site, Sb(18) is bonded to two equivalent La(3), two equivalent La(4), one Ga(4), and one Sn(1) atom to form distorted SbLa4GaSn pentagonal pyramids that share corners with two equivalent Sb(19)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(12)La4GaSn pentagonal pyramids, corners with two equivalent Sb(17)La4GaSn pentagonal pyramids,  an edgeedge with one Sb(19)La4Ga2 pentagonal pyramid,  an edgeedge with one Sb(17)La4GaSn pentagonal pyramid, and edges with two equivalent Sb(18)La4GaSn pentagonal pyramids. In the nineteenth Sb site, Sb(19) is bonded to two equivalent La(2), two equivalent La(3), one Ga(3), and one Ga(8) atom to form distorted SbLa4Ga2 pentagonal pyramids that share corners with two equivalent Sb(13)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(20)La4Ga2 pentagonal pyramids, corners with two equivalent Sb(18)La4GaSn pentagonal pyramids,  an edgeedge with one Sb(20)La4Ga2 pentagonal pyramid,  an edgeedge with one Sb(18)La4GaSn pentagonal pyramid, and edges with two equivalent Sb(19)La4Ga2 pentagonal pyramids. In the twentieth Sb site, Sb(20) is bonded to two equivalent La(1), two equivalent La(2), one Ga(2), and one Ga(7) atom to form a mixture of distorted corner and edge-sharing SbLa4Ga2 pentagonal pyramids.