Th3CeAl2 is Khatyrkite-derived structured and crystallizes in the orthorhombic Fmm2 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 Ce(1) and four equivalent Al(1) atoms. In the second Th site, Th(2) is bonded in a 4-coordinate geometry to two equivalent Ce(1) and four equivalent Al(1) atoms. Ce(1) is bonded in a 11-coordinate geometry to three equivalent Th(1), four equivalent Th(2), and four equivalent Al(1) atoms. Al(1) is bonded in a distorted q6 geometry to two equivalent Th(1), four equivalent Th(2), two equivalent Ce(1), and two equivalent Al(1) atoms.
Th3CeAl2 is Khatyrkite-derived structured and crystallizes in the orthorhombic Fmm2 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 Ce(1) and four equivalent Al(1) atoms. There is one shorter (3.39 Å) and two longer (3.45 Å) Th(1)-Ce(1) bond lengths. All Th(1)-Al(1) bond lengths are 3.26 Å. In the second Th site, Th(2) is bonded in a 4-coordinate geometry to two equivalent Ce(1) and four equivalent Al(1) atoms. Both Th(2)-Ce(1) bond lengths are 3.66 Å. There are two shorter (3.23 Å) and two longer (3.25 Å) Th(2)-Al(1) bond lengths. Ce(1) is bonded in a 11-coordinate geometry to three equivalent Th(1), four equivalent Th(2), and four equivalent Al(1) atoms. All Ce(1)-Al(1) bond lengths are 3.24 Å. Al(1) is bonded in a distorted q6 geometry to two equivalent Th(1), four equivalent Th(2), two equivalent Ce(1), and two equivalent Al(1) atoms. Both Al(1)-Al(1) bond lengths are 2.75 Å.