Ce4La(RuSi)10 crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 16-coordinate geometry to four equivalent Ru(1), four equivalent Ru(2), four equivalent Si(2), and four equivalent Si(5) atoms. In the second Ce site, Ce(2) is bonded in a 16-coordinate geometry to four equivalent Ru(2), four equivalent Ru(3), four equivalent Si(3), and four equivalent Si(4) atoms. La(1) is bonded in a 16-coordinate geometry to eight equivalent Ru(1) and eight equivalent Si(1) atoms. There are three inequivalent Ru sites. In the first Ru site, Ru(3) is bonded in a 4-coordinate geometry to four equivalent Ce(2) and four equivalent Si(3) atoms. In the second Ru site, Ru(1) is bonded in a 4-coordinate geometry to two equivalent Ce(1), two equivalent La(1), two equivalent Si(1), and two equivalent Si(5) atoms. In the third Ru site, Ru(2) is bonded in a 4-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), two equivalent Si(2), and two equivalent Si(4) atoms. There are five inequivalent Si sites. In the first Si site, Si(1) is bonded in a 4-coordinate geometry to four equivalent La(1) and four equivalent Ru(1) atoms. In the second Si site, Si(2) is bonded in a 4-coordinate geometry to four equivalent Ce(1) and four equivalent Ru(2) atoms. In the third Si site, Si(3) is bonded in a 4-coordinate geometry to four equivalent Ce(2) and four equivalent Ru(3) atoms. In the fourth Si site, Si(4) is bonded in a 4-coordinate geometry to four equivalent Ce(2) and four equivalent Ru(2) atoms. In the fifth Si site, Si(5) is bonded in a 4-coordinate geometry to four equivalent Ce(1) and four equivalent Ru(1) atoms.
Ce4La(RuSi)10 crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Ce sites. In the first Ce site, Ce(1) is bonded in a 16-coordinate geometry to four equivalent Ru(1), four equivalent Ru(2), four equivalent Si(2), and four equivalent Si(5) atoms. All Ce(1)-Ru(1) bond lengths are 3.20 Å. All Ce(1)-Ru(2) bond lengths are 3.21 Å. All Ce(1)-Si(2) bond lengths are 3.24 Å. All Ce(1)-Si(5) bond lengths are 3.24 Å. In the second Ce site, Ce(2) is bonded in a 16-coordinate geometry to four equivalent Ru(2), four equivalent Ru(3), four equivalent Si(3), and four equivalent Si(4) atoms. All Ce(2)-Ru(2) bond lengths are 3.23 Å. All Ce(2)-Ru(3) bond lengths are 3.22 Å. All Ce(2)-Si(3) bond lengths are 3.24 Å. All Ce(2)-Si(4) bond lengths are 3.25 Å. La(1) is bonded in a 16-coordinate geometry to eight equivalent Ru(1) and eight equivalent Si(1) atoms. All La(1)-Ru(1) bond lengths are 3.25 Å. All La(1)-Si(1) bond lengths are 3.26 Å. There are three inequivalent Ru sites. In the first Ru site, Ru(3) is bonded in a 4-coordinate geometry to four equivalent Ce(2) and four equivalent Si(3) atoms. All Ru(3)-Si(3) bond lengths are 2.40 Å. In the second Ru site, Ru(1) is bonded in a 4-coordinate geometry to two equivalent Ce(1), two equivalent La(1), two equivalent Si(1), and two equivalent Si(5) atoms. Both Ru(1)-Si(1) bond lengths are 2.40 Å. Both Ru(1)-Si(5) bond lengths are 2.39 Å. In the third Ru site, Ru(2) is bonded in a 4-coordinate geometry to two equivalent Ce(1), two equivalent Ce(2), two equivalent Si(2), and two equivalent Si(4) atoms. Both Ru(2)-Si(2) bond lengths are 2.40 Å. Both Ru(2)-Si(4) bond lengths are 2.40 Å. There are five inequivalent Si sites. In the first Si site, Si(1) is bonded in a 4-coordinate geometry to four equivalent La(1) and four equivalent Ru(1) atoms. In the second Si site, Si(2) is bonded in a 4-coordinate geometry to four equivalent Ce(1) and four equivalent Ru(2) atoms. In the third Si site, Si(3) is bonded in a 4-coordinate geometry to four equivalent Ce(2) and four equivalent Ru(3) atoms. In the fourth Si site, Si(4) is bonded in a 4-coordinate geometry to four equivalent Ce(2) and four equivalent Ru(2) atoms. In the fifth Si site, Si(5) is bonded in a 4-coordinate geometry to four equivalent Ce(1) and four equivalent Ru(1) atoms.