RuSi2 crystallizes in the orthorhombic Cmce space group. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 8-coordinate geometry to four equivalent Si(1) and four equivalent Si(2) atoms. In the second Ru site, Ru(2) is bonded in a 8-coordinate geometry to four equivalent Si(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 Ru(1), two equivalent Ru(2), two equivalent Si(1), and three equivalent Si(2) atoms. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Ru(1), two equivalent Ru(2), two equivalent Si(2), and three equivalent Si(1) atoms.
RuSi2 crystallizes in the orthorhombic Cmce space group. There are two inequivalent Ru sites. In the first Ru site, Ru(1) is bonded in a 8-coordinate geometry to four equivalent Si(1) and four equivalent Si(2) atoms. All Ru(1)-Si(1) bond lengths are 2.45 Å. There are two shorter (2.46 Å) and two longer (2.47 Å) Ru(1)-Si(2) bond lengths. In the second Ru site, Ru(2) is bonded in a 8-coordinate geometry to four equivalent Si(1) and four equivalent Si(2) atoms. There are two shorter (2.45 Å) and two longer (2.51 Å) Ru(2)-Si(1) bond lengths. There are two shorter (2.44 Å) and two longer (2.49 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 Ru(1), two equivalent Ru(2), two equivalent Si(1), and three equivalent Si(2) atoms. There is one shorter (2.59 Å) and one longer (2.68 Å) Si(1)-Si(1) bond length. There are a spread of Si(1)-Si(2) bond distances ranging from 2.56-2.68 Å. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Ru(1), two equivalent Ru(2), two equivalent Si(2), and three equivalent Si(1) atoms. There is one shorter (2.53 Å) and one longer (2.57 Å) Si(2)-Si(2) bond length.