Ru4Si3 crystallizes in the orthorhombic Pnma space group. There are four inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 3-coordinate geometry to one Si(1) and four equivalent Si(3) atoms. In the second Ru site, Ru(2) is bonded in a 7-coordinate geometry to two equivalent Si(1), two equivalent Si(3), and three equivalent Si(2) atoms. In the third Ru site, Ru(3) is bonded in a 8-coordinate geometry to one Si(3), three equivalent Si(1), and four equivalent Si(2) atoms. In the fourth Ru site, Ru(4) is bonded in a 6-coordinate geometry to one Si(2), two equivalent Si(1), and three equivalent Si(3) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a body-centered cubic geometry to one Ru(1), two equivalent Ru(2), two equivalent Ru(4), and three equivalent Ru(3) atoms. In the second Si site, Si(2) is bonded in a distorted body-centered cubic geometry to one Ru(4), three equivalent Ru(2), and four equivalent Ru(3) atoms. In the third Si site, Si(3) is bonded in a 10-coordinate geometry to one Ru(3), two equivalent Ru(2), three equivalent Ru(4), and four equivalent Ru(1) atoms.
Ru4Si3 crystallizes in the orthorhombic Pnma space group. There are four inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 3-coordinate geometry to one Si(1) and four equivalent Si(3) atoms. The Ru(1)-Si(1) bond length is 2.41 Å. There are two shorter (2.45 Å) and two longer (2.78 Å) Ru(1)-Si(3) bond lengths. In the second Ru site, Ru(2) is bonded in a 7-coordinate geometry to two equivalent Si(1), two equivalent Si(3), and three equivalent Si(2) atoms. There is one shorter (2.57 Å) and one longer (2.61 Å) Ru(2)-Si(1) bond length. Both Ru(2)-Si(3) bond lengths are 2.53 Å. There are two shorter (2.51 Å) and one longer (2.52 Å) Ru(2)-Si(2) bond length. In the third Ru site, Ru(3) is bonded in a 8-coordinate geometry to one Si(3), three equivalent Si(1), and four equivalent Si(2) atoms. The Ru(3)-Si(3) bond length is 2.94 Å. There is one shorter (2.44 Å) and two longer (2.55 Å) Ru(3)-Si(1) bond lengths. There are a spread of Ru(3)-Si(2) bond distances ranging from 2.46-2.71 Å. In the fourth Ru site, Ru(4) is bonded in a 6-coordinate geometry to one Si(2), two equivalent Si(1), and three equivalent Si(3) atoms. The Ru(4)-Si(2) bond length is 2.44 Å. Both Ru(4)-Si(1) bond lengths are 2.40 Å. There are a spread of Ru(4)-Si(3) bond distances ranging from 2.45-2.81 Å. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a body-centered cubic geometry to one Ru(1), two equivalent Ru(2), two equivalent Ru(4), and three equivalent Ru(3) atoms. In the second Si site, Si(2) is bonded in a distorted body-centered cubic geometry to one Ru(4), three equivalent Ru(2), and four equivalent Ru(3) atoms. In the third Si site, Si(3) is bonded in a 10-coordinate geometry to one Ru(3), two equivalent Ru(2), three equivalent Ru(4), and four equivalent Ru(1) atoms.