ErIn3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Er(1) is bonded to twelve equivalent In(1) atoms to form ErIn12 cuboctahedra that share corners with twelve equivalent Er(1)In12 cuboctahedra, edges with twenty-four equivalent In(1)Er4In8 cuboctahedra, faces with six equivalent Er(1)In12 cuboctahedra, and faces with twelve equivalent In(1)Er4In8 cuboctahedra. In(1) is bonded to four equivalent Er(1) and eight equivalent In(1) atoms to form distorted InEr4In8 cuboctahedra that share corners with twelve equivalent In(1)Er4In8 cuboctahedra, edges with eight equivalent Er(1)In12 cuboctahedra, edges with sixteen equivalent In(1)Er4In8 cuboctahedra, faces with four equivalent Er(1)In12 cuboctahedra, and faces with fourteen equivalent In(1)Er4In8 cuboctahedra.
ErIn3 is Uranium Silicide structured and crystallizes in the cubic Pm-3m space group. Er(1) is bonded to twelve equivalent In(1) atoms to form ErIn12 cuboctahedra that share corners with twelve equivalent Er(1)In12 cuboctahedra, edges with twenty-four equivalent In(1)Er4In8 cuboctahedra, faces with six equivalent Er(1)In12 cuboctahedra, and faces with twelve equivalent In(1)Er4In8 cuboctahedra. All Er(1)-In(1) bond lengths are 3.25 Å. In(1) is bonded to four equivalent Er(1) and eight equivalent In(1) atoms to form distorted InEr4In8 cuboctahedra that share corners with twelve equivalent In(1)Er4In8 cuboctahedra, edges with eight equivalent Er(1)In12 cuboctahedra, edges with sixteen equivalent In(1)Er4In8 cuboctahedra, faces with four equivalent Er(1)In12 cuboctahedra, and faces with fourteen equivalent In(1)Er4In8 cuboctahedra. All In(1)-In(1) bond lengths are 3.25 Å.