DOE OSTI2020
Nd2CoIn8 crystallizes in the tetragonal P4/mmm space group. The structure is three-dimensional. Nd is bonded to twelve In atoms to form NdIn12 cuboctahedra that share corners with eight equivalent NdIn12 cuboctahedra, edges with twelve InNd4In8 cuboctahedra, faces with five equivalent NdIn12 cuboctahedra, and faces with eight InNd4In8 cuboctahedra. There are a spread of Nd–In bond distances ranging from 3.29–3.35 Å. Co is bonded in a body-centered cubic geometry to eight In atoms. All Co–In bond lengths are 2.74 Å. There are four inequivalent In sites. In the first In site, In is bonded in a 4-coordinate geometry to two equivalent Nd, two equivalent Co, and seven In atoms. There are a spread of In–In bond distances ranging from 2.86–3.31 Å. In the second In site, In is bonded in a 4-coordinate geometry to two equivalent Nd, two equivalent Co, and seven In atoms. Both In–Nd bond lengths are 3.29 Å. There are two shorter (3.29 Å) and four longer (3.31 Å) In–In bond lengths. In the third In site, In is bonded to four equivalent Nd and eight In atoms to form distorted InNd4In8 cuboctahedra that share corners with four equivalent InNd4In8 cuboctahedra, edges with eight equivalent NdIn12 cuboctahedra, edges with eight equivalent InNd4In8 cuboctahedra, faces with four equivalent NdIn12 cuboctahedra, and faces with twelve InNd4In8 cuboctahedra. There are four shorter (3.31 Å) and four longer (3.35 Å) In–In bond lengths. In the fourth In site, In is bonded to four equivalent Nd and eight In atoms to form distorted InNd4In8 cuboctahedra that share corners with eight equivalent InNd4In8 cuboctahedra, edges with four equivalent NdIn12 cuboctahedra, edges with eight equivalent InNd4In8 cuboctahedra, faces with four equivalent NdIn12 cuboctahedra, and faces with nine InNd4In8 cuboctahedra.