Th2GeSi crystallizes in the orthorhombic Pmc2_1 space group. There are two inequivalent Th sites. In the first Th site, Th(1) is bonded in a 7-coordinate geometry to three equivalent Ge(1) and four equivalent Si(1) atoms. In the second Th site, Th(2) is bonded in a 7-coordinate geometry to four equivalent Ge(1) and three equivalent Si(1) atoms. Ge(1) is bonded in a 9-coordinate geometry to three equivalent Th(1), four equivalent Th(2), and two equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to three equivalent Th(2), four equivalent Th(1), and two equivalent Ge(1) atoms.
Th2GeSi crystallizes in the orthorhombic Pmc2_1 space group. There are two inequivalent Th sites. In the first Th site, Th(1) is bonded in a 7-coordinate geometry to three equivalent Ge(1) and four equivalent Si(1) atoms. There are a spread of Th(1)-Ge(1) bond distances ranging from 3.12-3.28 Å. There are two shorter (3.05 Å) and two longer (3.09 Å) Th(1)-Si(1) bond lengths. In the second Th site, Th(2) is bonded in a 7-coordinate geometry to four equivalent Ge(1) and three equivalent Si(1) atoms. There are two shorter (3.07 Å) and two longer (3.09 Å) Th(2)-Ge(1) bond lengths. There are a spread of Th(2)-Si(1) bond distances ranging from 3.07-3.30 Å. Ge(1) is bonded in a 9-coordinate geometry to three equivalent Th(1), four equivalent Th(2), and two equivalent Si(1) atoms. Both Ge(1)-Si(1) bond lengths are 2.80 Å. Si(1) is bonded in a 9-coordinate geometry to three equivalent Th(2), four equivalent Th(1), and two equivalent Ge(1) atoms.