K3Nd is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. K(1) is bonded to eight equivalent K(1) and four equivalent Nd(1) atoms to form distorted KK8Nd4 cuboctahedra that share corners with four equivalent Nd(1)K12 cuboctahedra, corners with fourteen equivalent K(1)K8Nd4 cuboctahedra, edges with six equivalent Nd(1)K12 cuboctahedra, edges with twelve equivalent K(1)K8Nd4 cuboctahedra, faces with four equivalent Nd(1)K12 cuboctahedra, and faces with sixteen equivalent K(1)K8Nd4 cuboctahedra. Nd(1) is bonded to twelve equivalent K(1) atoms to form NdK12 cuboctahedra that share corners with six equivalent Nd(1)K12 cuboctahedra, corners with twelve equivalent K(1)K8Nd4 cuboctahedra, edges with eighteen equivalent K(1)K8Nd4 cuboctahedra, faces with eight equivalent Nd(1)K12 cuboctahedra, and faces with twelve equivalent K(1)K8Nd4 cuboctahedra.
K3Nd is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. K(1) is bonded to eight equivalent K(1) and four equivalent Nd(1) atoms to form distorted KK8Nd4 cuboctahedra that share corners with four equivalent Nd(1)K12 cuboctahedra, corners with fourteen equivalent K(1)K8Nd4 cuboctahedra, edges with six equivalent Nd(1)K12 cuboctahedra, edges with twelve equivalent K(1)K8Nd4 cuboctahedra, faces with four equivalent Nd(1)K12 cuboctahedra, and faces with sixteen equivalent K(1)K8Nd4 cuboctahedra. There are a spread of K(1)-K(1) bond distances ranging from 4.22-4.44 Å. There are two shorter (4.33 Å) and two longer (4.34 Å) K(1)-Nd(1) bond lengths. Nd(1) is bonded to twelve equivalent K(1) atoms to form NdK12 cuboctahedra that share corners with six equivalent Nd(1)K12 cuboctahedra, corners with twelve equivalent K(1)K8Nd4 cuboctahedra, edges with eighteen equivalent K(1)K8Nd4 cuboctahedra, faces with eight equivalent Nd(1)K12 cuboctahedra, and faces with twelve equivalent K(1)K8Nd4 cuboctahedra.