Sc2W3Si4 is delta Molybdenum Boride-derived structured and crystallizes in the orthorhombic Pnma space group. Sc(1) is bonded in a 7-coordinate geometry to one Si(2), two equivalent Si(3), and four equivalent Si(1) atoms. There are two inequivalent W sites. In the first W site, W(2) is bonded in a 6-coordinate geometry to two equivalent Si(1), two equivalent Si(2), and two equivalent Si(3) atoms. In the second W site, W(1) is bonded in a 6-coordinate geometry to one Si(3), two equivalent Si(2), and three equivalent Si(1) atoms. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to four equivalent Sc(1), one W(2), three equivalent W(1), and one Si(1) atom. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Sc(1), two equivalent W(2), four equivalent W(1), and one Si(3) atom. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to four equivalent Sc(1), two equivalent W(1), two equivalent W(2), and one Si(2) atom.
Sc2W3Si4 is delta Molybdenum Boride-derived structured and crystallizes in the orthorhombic Pnma space group. Sc(1) is bonded in a 7-coordinate geometry to one Si(2), two equivalent Si(3), and four equivalent Si(1) atoms. The Sc(1)-Si(2) bond length is 2.80 Å. There is one shorter (2.72 Å) and one longer (2.79 Å) Sc(1)-Si(3) bond length. There are a spread of Sc(1)-Si(1) bond distances ranging from 2.70-2.89 Å. There are two inequivalent W sites. In the first W site, W(2) is bonded in a 6-coordinate geometry to two equivalent Si(1), two equivalent Si(2), and two equivalent Si(3) atoms. Both W(2)-Si(1) bond lengths are 2.62 Å. There is one shorter (2.57 Å) and one longer (2.75 Å) W(2)-Si(2) bond length. There is one shorter (2.56 Å) and one longer (2.58 Å) W(2)-Si(3) bond length. In the second W site, W(1) is bonded in a 6-coordinate geometry to one Si(3), two equivalent Si(2), and three equivalent Si(1) atoms. The W(1)-Si(3) bond length is 2.63 Å. There is one shorter (2.53 Å) and one longer (2.55 Å) W(1)-Si(2) bond length. There are a spread of W(1)-Si(1) bond distances ranging from 2.51-2.58 Å. There are three inequivalent Si sites. In the first Si site, Si(1) is bonded in a 9-coordinate geometry to four equivalent Sc(1), one W(2), three equivalent W(1), and one Si(1) atom. The Si(1)-Si(1) bond length is 2.53 Å. In the second Si site, Si(2) is bonded in a 9-coordinate geometry to two equivalent Sc(1), two equivalent W(2), four equivalent W(1), and one Si(3) atom. The Si(2)-Si(3) bond length is 2.49 Å. In the third Si site, Si(3) is bonded in a 9-coordinate geometry to four equivalent Sc(1), two equivalent W(1), two equivalent W(2), and one Si(2) atom.