Lu3Pr is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. There are three inequivalent Lu sites. In the first Lu site, Lu(1) is bonded to eight Lu(1,1) and four equivalent Pr(1) atoms to form LuPr4Lu8 cuboctahedra that share corners with four equivalent Pr(1)Lu12 cuboctahedra; corners with fourteen equivalent Lu(1)Pr4Lu8 cuboctahedra; edges with six equivalent Pr(1)Lu12 cuboctahedra; edges with twelve Lu(1,1)Pr4Lu8 cuboctahedra; faces with four equivalent Pr(1)Lu12 cuboctahedra; and faces with sixteen Lu(1,1,1)Pr4Lu8 cuboctahedra. In the second Lu site, Lu(1) is bonded to eight Lu(1,1) and four equivalent Pr(1) atoms to form LuPr4Lu8 cuboctahedra that share corners with four equivalent Pr(1)Lu12 cuboctahedra; corners with fourteen Lu(1,1,1)Pr4Lu8 cuboctahedra; edges with six equivalent Pr(1)Lu12 cuboctahedra; edges with twelve Lu(1,1)Pr4Lu8 cuboctahedra; faces with four equivalent Pr(1)Lu12 cuboctahedra; and faces with sixteen Lu(1,1,1)Pr4Lu8 cuboctahedra. In the third Lu site, Lu(1) is bonded to eight Lu(1,1) and four equivalent Pr(1) atoms to form LuPr4Lu8 cuboctahedra that share corners with four equivalent Pr(1)Lu12 cuboctahedra; corners with fourteen Lu(1,1,1)Pr4Lu8 cuboctahedra; edges with six equivalent Pr(1)Lu12 cuboctahedra; edges with twelve Lu(1,1)Pr4Lu8 cuboctahedra; faces with four equivalent Pr(1)Lu12 cuboctahedra; and faces with sixteen Lu(1,1,1)Pr4Lu8 cuboctahedra. Pr(1) is bonded to twelve Lu(1,1,1) atoms to form PrLu12 cuboctahedra that share corners with six equivalent Pr(1)Lu12 cuboctahedra; corners with twelve Lu(1,1,1)Pr4Lu8 cuboctahedra; edges with eighteen Lu(1,1,1)Pr4Lu8 cuboctahedra; faces with eight equivalent Pr(1)Lu12 cuboctahedra; and faces with twelve Lu(1,1,1)Pr4Lu8 cuboctahedra.
Lu3Pr is beta Cu3Ti-like structured and crystallizes in the hexagonal P6_3/mmc space group. There are three inequivalent Lu sites. In the first Lu site, Lu(1) is bonded to eight Lu(1,1) and four equivalent Pr(1) atoms to form LuPr4Lu8 cuboctahedra that share corners with four equivalent Pr(1)Lu12 cuboctahedra; corners with fourteen equivalent Lu(1)Pr4Lu8 cuboctahedra; edges with six equivalent Pr(1)Lu12 cuboctahedra; edges with twelve Lu(1,1)Pr4Lu8 cuboctahedra; faces with four equivalent Pr(1)Lu12 cuboctahedra; and faces with sixteen Lu(1,1,1)Pr4Lu8 cuboctahedra. There are a spread of Lu(1)-Lu(1,1) bond distances ranging from 3.49-3.65 Å. There are two shorter (3.54 Å) and two longer (3.58 Å) Lu(1)-Pr(1) bond lengths. In the second Lu site, Lu(1) is bonded to eight Lu(1,1) and four equivalent Pr(1) atoms to form LuPr4Lu8 cuboctahedra that share corners with four equivalent Pr(1)Lu12 cuboctahedra; corners with fourteen Lu(1,1,1)Pr4Lu8 cuboctahedra; edges with six equivalent Pr(1)Lu12 cuboctahedra; edges with twelve Lu(1,1)Pr4Lu8 cuboctahedra; faces with four equivalent Pr(1)Lu12 cuboctahedra; and faces with sixteen Lu(1,1,1)Pr4Lu8 cuboctahedra. There are a spread of Lu(1)-Lu(1,1) bond distances ranging from 3.49-3.65 Å. There are two shorter (3.54 Å) and two longer (3.58 Å) Lu(1)-Pr(1) bond lengths. In the third Lu site, Lu(1) is bonded to eight Lu(1,1) and four equivalent Pr(1) atoms to form LuPr4Lu8 cuboctahedra that share corners with four equivalent Pr(1)Lu12 cuboctahedra; corners with fourteen Lu(1,1,1)Pr4Lu8 cuboctahedra; edges with six equivalent Pr(1)Lu12 cuboctahedra; edges with twelve Lu(1,1)Pr4Lu8 cuboctahedra; faces with four equivalent Pr(1)Lu12 cuboctahedra; and faces with sixteen Lu(1,1,1)Pr4Lu8 cuboctahedra. There are two shorter (3.54 Å) and two longer (3.58 Å) Lu(1)-Pr(1) bond lengths. Pr(1) is bonded to twelve Lu(1,1,1) atoms to form PrLu12 cuboctahedra that share corners with six equivalent Pr(1)Lu12 cuboctahedra; corners with twelve Lu(1,1,1)Pr4Lu8 cuboctahedra; edges with eighteen Lu(1,1,1)Pr4Lu8 cuboctahedra; faces with eight equivalent Pr(1)Lu12 cuboctahedra; and faces with twelve Lu(1,1,1)Pr4Lu8 cuboctahedra.