HoLa3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. Ho(1) is bonded to four equivalent La(2) and eight equivalent La(1) atoms to form HoLa12 cuboctahedra that share corners with four equivalent Ho(1)La12 cuboctahedra, corners with eight equivalent La(2)La8Ho4 cuboctahedra, edges with eight equivalent Ho(1)La12 cuboctahedra, edges with sixteen equivalent La(1)La8Ho4 cuboctahedra, faces with four equivalent Ho(1)La12 cuboctahedra, faces with six equivalent La(2)La8Ho4 cuboctahedra, and faces with eight equivalent La(1)La8Ho4 cuboctahedra. There are two inequivalent La sites. In the first La site, La(1) is bonded to four equivalent Ho(1), four equivalent La(1), and four equivalent La(2) atoms to form LaLa8Ho4 cuboctahedra that share corners with twelve equivalent La(1)La8Ho4 cuboctahedra, edges with eight equivalent Ho(1)La12 cuboctahedra, edges with eight equivalent La(1)La8Ho4 cuboctahedra, edges with eight equivalent La(2)La8Ho4 cuboctahedra, faces with four equivalent Ho(1)La12 cuboctahedra, faces with four equivalent La(2)La8Ho4 cuboctahedra, and faces with ten equivalent La(1)La8Ho4 cuboctahedra. In the second La site, La(2) is bonded to four equivalent Ho(1) and eight equivalent La(1) atoms to form LaLa8Ho4 cuboctahedra that share corners with four equivalent La(2)La8Ho4 cuboctahedra, corners with eight equivalent Ho(1)La12 cuboctahedra, edges with eight equivalent La(2)La8Ho4 cuboctahedra, edges with sixteen equivalent La(1)La8Ho4 cuboctahedra, faces with four equivalent La(2)La8Ho4 cuboctahedra, faces with six equivalent Ho(1)La12 cuboctahedra, and faces with eight equivalent La(1)La8Ho4 cuboctahedra.
HoLa3 is beta Cu3Ti-like structured and crystallizes in the tetragonal I4/mmm space group. Ho(1) is bonded to four equivalent La(2) and eight equivalent La(1) atoms to form HoLa12 cuboctahedra that share corners with four equivalent Ho(1)La12 cuboctahedra, corners with eight equivalent La(2)La8Ho4 cuboctahedra, edges with eight equivalent Ho(1)La12 cuboctahedra, edges with sixteen equivalent La(1)La8Ho4 cuboctahedra, faces with four equivalent Ho(1)La12 cuboctahedra, faces with six equivalent La(2)La8Ho4 cuboctahedra, and faces with eight equivalent La(1)La8Ho4 cuboctahedra. All Ho(1)-La(2) bond lengths are 3.69 Å. All Ho(1)-La(1) bond lengths are 3.70 Å. There are two inequivalent La sites. In the first La site, La(1) is bonded to four equivalent Ho(1), four equivalent La(1), and four equivalent La(2) atoms to form LaLa8Ho4 cuboctahedra that share corners with twelve equivalent La(1)La8Ho4 cuboctahedra, edges with eight equivalent Ho(1)La12 cuboctahedra, edges with eight equivalent La(1)La8Ho4 cuboctahedra, edges with eight equivalent La(2)La8Ho4 cuboctahedra, faces with four equivalent Ho(1)La12 cuboctahedra, faces with four equivalent La(2)La8Ho4 cuboctahedra, and faces with ten equivalent La(1)La8Ho4 cuboctahedra. All La(1)-La(1) bond lengths are 3.69 Å. All La(1)-La(2) bond lengths are 3.70 Å. In the second La site, La(2) is bonded to four equivalent Ho(1) and eight equivalent La(1) atoms to form LaLa8Ho4 cuboctahedra that share corners with four equivalent La(2)La8Ho4 cuboctahedra, corners with eight equivalent Ho(1)La12 cuboctahedra, edges with eight equivalent La(2)La8Ho4 cuboctahedra, edges with sixteen equivalent La(1)La8Ho4 cuboctahedra, faces with four equivalent La(2)La8Ho4 cuboctahedra, faces with six equivalent Ho(1)La12 cuboctahedra, and faces with eight equivalent La(1)La8Ho4 cuboctahedra.