La18Co28In3 crystallizes in the tetragonal I4/mmm space group. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 16-coordinate geometry to eight equivalent Co(1) and eight equivalent Co(2) atoms. In the second La site, La(2) is bonded in a 8-coordinate geometry to two equivalent Co(2), four equivalent Co(1), and two equivalent In(2) atoms. In the third La site, La(3) is bonded in a 7-coordinate geometry to two equivalent Co(3), four equivalent Co(1), one In(1), and one In(2) atom. In the fourth La site, La(4) is bonded in a 7-coordinate geometry to two equivalent Co(2), four equivalent Co(1), and one In(1) atom. There are three inequivalent Co sites. In the first Co site, Co(3) is bonded in a 8-coordinate geometry to four equivalent La(3) and four equivalent Co(1) atoms. In the second Co site, Co(1) is bonded in a 10-coordinate geometry to one La(1), one La(2), one La(4), two equivalent La(3), one Co(3), two equivalent Co(1), and two equivalent Co(2) atoms. In the third Co site, Co(2) is bonded in a 10-coordinate geometry to one La(2), one La(4), two equivalent La(1), two equivalent Co(2), and four equivalent Co(1) atoms. There are two inequivalent In sites. In the first In site, In(1) is bonded in a 14-coordinate geometry to four equivalent La(4), eight equivalent La(3), and two equivalent In(2) atoms. In the second In site, In(2) is bonded in a 10-coordinate geometry to four equivalent La(2), four equivalent La(3), one In(1), and one In(2) atom.
La18Co28In3 crystallizes in the tetragonal I4/mmm space group. There are four inequivalent La sites. In the first La site, La(1) is bonded in a 16-coordinate geometry to eight equivalent Co(1) and eight equivalent Co(2) atoms. All La(1)-Co(1) bond lengths are 3.22 Å. There are four shorter (3.00 Å) and four longer (3.01 Å) La(1)-Co(2) bond lengths. In the second La site, La(2) is bonded in a 8-coordinate geometry to two equivalent Co(2), four equivalent Co(1), and two equivalent In(2) atoms. Both La(2)-Co(2) bond lengths are 3.08 Å. All La(2)-Co(1) bond lengths are 2.90 Å. Both La(2)-In(2) bond lengths are 3.75 Å. In the third La site, La(3) is bonded in a 7-coordinate geometry to two equivalent Co(3), four equivalent Co(1), one In(1), and one In(2) atom. There is one shorter (2.93 Å) and one longer (2.96 Å) La(3)-Co(3) bond length. There are two shorter (2.93 Å) and two longer (2.97 Å) La(3)-Co(1) bond lengths. The La(3)-In(1) bond length is 4.06 Å. The La(3)-In(2) bond length is 3.48 Å. In the fourth La site, La(4) is bonded in a 7-coordinate geometry to two equivalent Co(2), four equivalent Co(1), and one In(1) atom. Both La(4)-Co(2) bond lengths are 2.97 Å. All La(4)-Co(1) bond lengths are 2.88 Å. The La(4)-In(1) bond length is 3.58 Å. There are three inequivalent Co sites. In the first Co site, Co(3) is bonded in a 8-coordinate geometry to four equivalent La(3) and four equivalent Co(1) atoms. All Co(3)-Co(1) bond lengths are 2.40 Å. In the second Co site, Co(1) is bonded in a 10-coordinate geometry to one La(1), one La(2), one La(4), two equivalent La(3), one Co(3), two equivalent Co(1), and two equivalent Co(2) atoms. There is one shorter (2.38 Å) and one longer (2.40 Å) Co(1)-Co(1) bond length. There is one shorter (2.43 Å) and one longer (2.47 Å) Co(1)-Co(2) bond length. In the third Co site, Co(2) is bonded in a 10-coordinate geometry to one La(2), one La(4), two equivalent La(1), two equivalent Co(2), and four equivalent Co(1) atoms. Both Co(2)-Co(2) bond lengths are 2.59 Å. There are two inequivalent In sites. In the first In site, In(1) is bonded in a 14-coordinate geometry to four equivalent La(4), eight equivalent La(3), and two equivalent In(2) atoms. Both In(1)-In(2) bond lengths are 3.21 Å. In the second In site, In(2) is bonded in a 10-coordinate geometry to four equivalent La(2), four equivalent La(3), one In(1), and one In(2) atom. The In(2)-In(2) bond length is 3.12 Å.