Ce4La is Copper-derived structured and crystallizes in the trigonal R-3m space group. There are five inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to three equivalent Ce(2), six equivalent Ce(1), and three equivalent La(1) atoms to form CeLa3Ce9 cuboctahedra that share corners with three equivalent Ce(2)Ce12 cuboctahedra; corners with nine equivalent Ce(1)La3Ce9 cuboctahedra; edges with six equivalent La(1)La6Ce6 cuboctahedra; edges with nine Ce(2,2)Ce12 cuboctahedra; edges with nine equivalent Ce(1)La3Ce9 cuboctahedra; faces with six equivalent Ce(2)Ce12 cuboctahedra; faces with six equivalent Ce(1)La3Ce9 cuboctahedra; and faces with six equivalent La(1)La6Ce6 cuboctahedra. In the second Ce site, Ce(2) is bonded to three equivalent Ce(1) and nine Ce(2,2) atoms to form CeCe12 cuboctahedra that share corners with three equivalent Ce(1)La3Ce9 cuboctahedra; corners with three equivalent La(1)La6Ce6 cuboctahedra; corners with six equivalent Ce(2)Ce12 cuboctahedra; edges with three equivalent La(1)La6Ce6 cuboctahedra; edges with nine equivalent Ce(1)La3Ce9 cuboctahedra; edges with twelve Ce(2,2)Ce12 cuboctahedra; faces with six equivalent Ce(1)La3Ce9 cuboctahedra; and faces with twelve Ce(2,2)Ce12 cuboctahedra. In the third Ce site, Ce(2) is bonded to three equivalent Ce(1) and nine Ce(2,2) atoms to form CeCe12 cuboctahedra that share corners with three equivalent Ce(1)La3Ce9 cuboctahedra; corners with three equivalent La(1)La6Ce6 cuboctahedra; corners with six equivalent Ce(2)Ce12 cuboctahedra; edges with three equivalent La(1)La6Ce6 cuboctahedra; edges with nine equivalent Ce(1)La3Ce9 cuboctahedra; edges with twelve Ce(2,2)Ce12 cuboctahedra; faces with six equivalent Ce(1)La3Ce9 cuboctahedra; and faces with twelve Ce(2,2)Ce12 cuboctahedra. In the fourth Ce site, Ce(2) is bonded to three equivalent Ce(1) and nine Ce(2,2) atoms to form CeCe12 cuboctahedra that share corners with three equivalent Ce(1)La3Ce9 cuboctahedra; corners with three equivalent La(1)La6Ce6 cuboctahedra; corners with six equivalent Ce(2)Ce12 cuboctahedra; edges with three equivalent La(1)La6Ce6 cuboctahedra; edges with nine equivalent Ce(1)La3Ce9 cuboctahedra; edges with twelve Ce(2,2)Ce12 cuboctahedra; faces with six equivalent Ce(1)La3Ce9 cuboctahedra; and faces with twelve Ce(2,2)Ce12 cuboctahedra. In the fifth Ce site, Ce(2) is bonded to three equivalent Ce(1) and nine Ce(2,2) atoms to form CeCe12 cuboctahedra that share corners with three equivalent Ce(1)La3Ce9 cuboctahedra; corners with three equivalent La(1)La6Ce6 cuboctahedra; corners with six equivalent Ce(2)Ce12 cuboctahedra; edges with three equivalent La(1)La6Ce6 cuboctahedra; edges with nine equivalent Ce(1)La3Ce9 cuboctahedra; edges with twelve Ce(2,2)Ce12 cuboctahedra; faces with six equivalent Ce(1)La3Ce9 cuboctahedra; and faces with twelve Ce(2,2)Ce12 cuboctahedra. La(1) is bonded to six equivalent Ce(1) and six equivalent La(1) atoms to form LaLa6Ce6 cuboctahedra that share corners with six equivalent Ce(2)Ce12 cuboctahedra, corners with six equivalent La(1)La6Ce6 cuboctahedra, edges with six equivalent Ce(2)Ce12 cuboctahedra, edges with six equivalent La(1)La6Ce6 cuboctahedra, edges with twelve equivalent Ce(1)La3Ce9 cuboctahedra, faces with six equivalent La(1)La6Ce6 cuboctahedra, and faces with twelve equivalent Ce(1)La3Ce9 cuboctahedra.
Ce4La is Copper-derived structured and crystallizes in the trigonal R-3m space group. There are five inequivalent Ce sites. In the first Ce site, Ce(1) is bonded to three equivalent Ce(2), six equivalent Ce(1), and three equivalent La(1) atoms to form CeLa3Ce9 cuboctahedra that share corners with three equivalent Ce(2)Ce12 cuboctahedra; corners with nine equivalent Ce(1)La3Ce9 cuboctahedra; edges with six equivalent La(1)La6Ce6 cuboctahedra; edges with nine Ce(2,2)Ce12 cuboctahedra; edges with nine equivalent Ce(1)La3Ce9 cuboctahedra; faces with six equivalent Ce(2)Ce12 cuboctahedra; faces with six equivalent Ce(1)La3Ce9 cuboctahedra; and faces with six equivalent La(1)La6Ce6 cuboctahedra. All Ce(1)-Ce(2) bond lengths are 3.34 Å. All Ce(1)-Ce(1) bond lengths are 3.40 Å. All Ce(1)-La(1) bond lengths are 3.46 Å. In the second Ce site, Ce(2) is bonded to three equivalent Ce(1) and nine Ce(2,2) atoms to form CeCe12 cuboctahedra that share corners with three equivalent Ce(1)La3Ce9 cuboctahedra; corners with three equivalent La(1)La6Ce6 cuboctahedra; corners with six equivalent Ce(2)Ce12 cuboctahedra; edges with three equivalent La(1)La6Ce6 cuboctahedra; edges with nine equivalent Ce(1)La3Ce9 cuboctahedra; edges with twelve Ce(2,2)Ce12 cuboctahedra; faces with six equivalent Ce(1)La3Ce9 cuboctahedra; and faces with twelve Ce(2,2)Ce12 cuboctahedra. There are three shorter (3.36 Å) and six longer (3.40 Å) Ce(2)-Ce(2,2) bond lengths. In the third Ce site, Ce(2) is bonded to three equivalent Ce(1) and nine Ce(2,2) atoms to form CeCe12 cuboctahedra that share corners with three equivalent Ce(1)La3Ce9 cuboctahedra; corners with three equivalent La(1)La6Ce6 cuboctahedra; corners with six equivalent Ce(2)Ce12 cuboctahedra; edges with three equivalent La(1)La6Ce6 cuboctahedra; edges with nine equivalent Ce(1)La3Ce9 cuboctahedra; edges with twelve Ce(2,2)Ce12 cuboctahedra; faces with six equivalent Ce(1)La3Ce9 cuboctahedra; and faces with twelve Ce(2,2)Ce12 cuboctahedra. All Ce(2)-Ce(1) bond lengths are 3.34 Å. All Ce(2)-Ce(2) bond lengths are 3.40 Å. In the fourth Ce site, Ce(2) is bonded to three equivalent Ce(1) and nine Ce(2,2) atoms to form CeCe12 cuboctahedra that share corners with three equivalent Ce(1)La3Ce9 cuboctahedra; corners with three equivalent La(1)La6Ce6 cuboctahedra; corners with six equivalent Ce(2)Ce12 cuboctahedra; edges with three equivalent La(1)La6Ce6 cuboctahedra; edges with nine equivalent Ce(1)La3Ce9 cuboctahedra; edges with twelve Ce(2,2)Ce12 cuboctahedra; faces with six equivalent Ce(1)La3Ce9 cuboctahedra; and faces with twelve Ce(2,2)Ce12 cuboctahedra. All Ce(2)-Ce(1) bond lengths are 3.34 Å. There are three shorter (3.36 Å) and six longer (3.40 Å) Ce(2)-Ce(2,2) bond lengths. In the fifth Ce site, Ce(2) is bonded to three equivalent Ce(1) and nine Ce(2,2) atoms to form CeCe12 cuboctahedra that share corners with three equivalent Ce(1)La3Ce9 cuboctahedra; corners with three equivalent La(1)La6Ce6 cuboctahedra; corners with six equivalent Ce(2)Ce12 cuboctahedra; edges with three equivalent La(1)La6Ce6 cuboctahedra; edges with nine equivalent Ce(1)La3Ce9 cuboctahedra; edges with twelve Ce(2,2)Ce12 cuboctahedra; faces with six equivalent Ce(1)La3Ce9 cuboctahedra; and faces with twelve Ce(2,2)Ce12 cuboctahedra. All Ce(2)-Ce(1) bond lengths are 3.34 Å. All Ce(2)-Ce(2) bond lengths are 3.40 Å. La(1) is bonded to six equivalent Ce(1) and six equivalent La(1) atoms to form LaLa6Ce6 cuboctahedra that share corners with six equivalent Ce(2)Ce12 cuboctahedra, corners with six equivalent La(1)La6Ce6 cuboctahedra, edges with six equivalent Ce(2)Ce12 cuboctahedra, edges with six equivalent La(1)La6Ce6 cuboctahedra, edges with twelve equivalent Ce(1)La3Ce9 cuboctahedra, faces with six equivalent La(1)La6Ce6 cuboctahedra, and faces with twelve equivalent Ce(1)La3Ce9 cuboctahedra. All La(1)-La(1) bond lengths are 3.40 Å.