UNd2Te4 crystallizes in the tetragonal I-42d space group. U(1) is bonded to eight equivalent Te(1) atoms to form distorted UTe8 hexagonal bipyramids that share corners with eight equivalent Nd(1)Te8 hexagonal bipyramids, edges with four equivalent U(1)Te8 hexagonal bipyramids, and faces with eight equivalent Nd(1)Te8 hexagonal bipyramids. Nd(1) is bonded to eight equivalent Te(1) atoms to form distorted NdTe8 hexagonal bipyramids that share corners with four equivalent U(1)Te8 hexagonal bipyramids, corners with four equivalent Nd(1)Te8 hexagonal bipyramids, edges with four equivalent Nd(1)Te8 hexagonal bipyramids, faces with four equivalent U(1)Te8 hexagonal bipyramids, and faces with four equivalent Nd(1)Te8 hexagonal bipyramids. Te(1) is bonded to two equivalent U(1) and four equivalent Nd(1) atoms to form a mixture of distorted edge, face, and corner-sharing TeNd4U2 octahedra. The corner-sharing octahedral tilt angles range from 15-50°.
UNd2Te4 crystallizes in the tetragonal I-42d space group. U(1) is bonded to eight equivalent Te(1) atoms to form distorted UTe8 hexagonal bipyramids that share corners with eight equivalent Nd(1)Te8 hexagonal bipyramids, edges with four equivalent U(1)Te8 hexagonal bipyramids, and faces with eight equivalent Nd(1)Te8 hexagonal bipyramids. There are four shorter (3.19 Å) and four longer (3.33 Å) U(1)-Te(1) bond lengths. Nd(1) is bonded to eight equivalent Te(1) atoms to form distorted NdTe8 hexagonal bipyramids that share corners with four equivalent U(1)Te8 hexagonal bipyramids, corners with four equivalent Nd(1)Te8 hexagonal bipyramids, edges with four equivalent Nd(1)Te8 hexagonal bipyramids, faces with four equivalent U(1)Te8 hexagonal bipyramids, and faces with four equivalent Nd(1)Te8 hexagonal bipyramids. There are a spread of Nd(1)-Te(1) bond distances ranging from 3.21-3.38 Å. Te(1) is bonded to two equivalent U(1) and four equivalent Nd(1) atoms to form a mixture of distorted edge, face, and corner-sharing TeNd4U2 octahedra. The corner-sharing octahedral tilt angles range from 15-50°.