ErCuSi is hexagonal omega structure-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Er(1) is bonded to six equivalent Cu(1) and six equivalent Si(1) atoms to form a mixture of face and edge-sharing ErCu6Si6 cuboctahedra. Cu(1) is bonded in a 9-coordinate geometry to six equivalent Er(1) and three equivalent Si(1) atoms. Si(1) is bonded in a 9-coordinate geometry to six equivalent Er(1) and three equivalent Cu(1) atoms.
ErCuSi is hexagonal omega structure-derived structured and crystallizes in the hexagonal P6_3/mmc space group. Er(1) is bonded to six equivalent Cu(1) and six equivalent Si(1) atoms to form a mixture of face and edge-sharing ErCu6Si6 cuboctahedra. All Er(1)-Cu(1) bond lengths are 3.00 Å. All Er(1)-Si(1) bond lengths are 3.00 Å. Cu(1) is bonded in a 9-coordinate geometry to six equivalent Er(1) and three equivalent Si(1) atoms. All Cu(1)-Si(1) bond lengths are 2.36 Å. Si(1) is bonded in a 9-coordinate geometry to six equivalent Er(1) and three equivalent Cu(1) atoms.