CeLa2S4 crystallizes in the tetragonal I-42d space group. Ce(1) is bonded to eight equivalent S(1) atoms to form distorted CeS8 hexagonal bipyramids that share corners with eight equivalent La(1)S8 hexagonal bipyramids, edges with four equivalent Ce(1)S8 hexagonal bipyramids, and faces with eight equivalent La(1)S8 hexagonal bipyramids. La(1) is bonded to eight equivalent S(1) atoms to form distorted LaS8 hexagonal bipyramids that share corners with four equivalent Ce(1)S8 hexagonal bipyramids, corners with four equivalent La(1)S8 hexagonal bipyramids, edges with four equivalent La(1)S8 hexagonal bipyramids, faces with four equivalent Ce(1)S8 hexagonal bipyramids, and faces with four equivalent La(1)S8 hexagonal bipyramids. S(1) is bonded to two equivalent Ce(1) and four equivalent La(1) atoms to form a mixture of distorted corner, face, and edge-sharing SLa4Ce2 octahedra. The corner-sharing octahedral tilt angles range from 16-50°.
CeLa2S4 crystallizes in the tetragonal I-42d space group. Ce(1) is bonded to eight equivalent S(1) atoms to form distorted CeS8 hexagonal bipyramids that share corners with eight equivalent La(1)S8 hexagonal bipyramids, edges with four equivalent Ce(1)S8 hexagonal bipyramids, and faces with eight equivalent La(1)S8 hexagonal bipyramids. There are four shorter (2.93 Å) and four longer (3.08 Å) Ce(1)-S(1) bond lengths. La(1) is bonded to eight equivalent S(1) atoms to form distorted LaS8 hexagonal bipyramids that share corners with four equivalent Ce(1)S8 hexagonal bipyramids, corners with four equivalent La(1)S8 hexagonal bipyramids, edges with four equivalent La(1)S8 hexagonal bipyramids, faces with four equivalent Ce(1)S8 hexagonal bipyramids, and faces with four equivalent La(1)S8 hexagonal bipyramids. There are a spread of La(1)-S(1) bond distances ranging from 2.94-3.11 Å. S(1) is bonded to two equivalent Ce(1) and four equivalent La(1) atoms to form a mixture of distorted corner, face, and edge-sharing SLa4Ce2 octahedra. The corner-sharing octahedral tilt angles range from 16-50°.