U4Ru2Si3 crystallizes in the orthorhombic Imma space group. There are three inequivalent U sites. In the first U site, U(1) is bonded in a 14-coordinate geometry to two equivalent U(1), two equivalent U(2), two equivalent U(3), two equivalent Ru(1), two equivalent Ru(2), two equivalent Si(1), and two equivalent Si(2) atoms. In the second U site, U(2) is bonded in a 6-coordinate geometry to two equivalent U(3), four equivalent U(1), two equivalent Ru(1), and four equivalent Si(2) atoms. In the third U site, U(3) is bonded in a 12-coordinate geometry to two equivalent U(2), four equivalent U(1), two equivalent Si(1), and four equivalent Si(2) atoms. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 11-coordinate geometry to two equivalent U(2), four equivalent U(1), two equivalent Si(2), and three equivalent Si(1) atoms. In the second Ru site, Ru(2) is bonded in a distorted body-centered cubic geometry to four equivalent U(1) and four equivalent Si(2) atoms. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent U(3), four equivalent U(1), and three equivalent Ru(1) atoms. In the second Si site, Si(2) is bonded in a 7-coordinate geometry to two equivalent U(1), two equivalent U(2), two equivalent U(3), one Ru(1), and two equivalent Ru(2) atoms.
U4Ru2Si3 crystallizes in the orthorhombic Imma space group. There are three inequivalent U sites. In the first U site, U(1) is bonded in a 14-coordinate geometry to two equivalent U(1), two equivalent U(2), two equivalent U(3), two equivalent Ru(1), two equivalent Ru(2), two equivalent Si(1), and two equivalent Si(2) atoms. Both U(1)-U(1) bond lengths are 2.87 Å. Both U(1)-U(2) bond lengths are 3.14 Å. Both U(1)-U(3) bond lengths are 3.14 Å. Both U(1)-Ru(1) bond lengths are 3.17 Å. Both U(1)-Ru(2) bond lengths are 2.93 Å. Both U(1)-Si(1) bond lengths are 3.00 Å. Both U(1)-Si(2) bond lengths are 3.23 Å. In the second U site, U(2) is bonded in a 6-coordinate geometry to two equivalent U(3), four equivalent U(1), two equivalent Ru(1), and four equivalent Si(2) atoms. Both U(2)-U(3) bond lengths are 2.87 Å. Both U(2)-Ru(1) bond lengths are 2.79 Å. All U(2)-Si(2) bond lengths are 2.95 Å. In the third U site, U(3) is bonded in a 12-coordinate geometry to two equivalent U(2), four equivalent U(1), two equivalent Si(1), and four equivalent Si(2) atoms. Both U(3)-Si(1) bond lengths are 3.00 Å. All U(3)-Si(2) bond lengths are 3.00 Å. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 11-coordinate geometry to two equivalent U(2), four equivalent U(1), two equivalent Si(2), and three equivalent Si(1) atoms. Both Ru(1)-Si(2) bond lengths are 2.51 Å. There is one shorter (2.59 Å) and two longer (2.90 Å) Ru(1)-Si(1) bond lengths. In the second Ru site, Ru(2) is bonded in a distorted body-centered cubic geometry to four equivalent U(1) and four equivalent Si(2) atoms. There are two shorter (2.43 Å) and two longer (2.46 Å) Ru(2)-Si(2) bond lengths. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to two equivalent U(3), four equivalent U(1), and three equivalent Ru(1) atoms. In the second Si site, Si(2) is bonded in a 7-coordinate geometry to two equivalent U(1), two equivalent U(2), two equivalent U(3), one Ru(1), and two equivalent Ru(2) atoms.