Y is alpha Samarium structured and crystallizes in the trigonal R-3m space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded to six equivalent Y(1) and six equivalent Y(2) atoms to form a mixture of corner, face, and edge-sharing YY12 cuboctahedra. In the second Y site, Y(2) is bonded to three equivalent Y(1) and nine Y(2,2) atoms to form a mixture of corner, face, and edge-sharing YY12 cuboctahedra. In the third Y site, Y(2) is bonded to three equivalent Y(1) and nine Y(2,2) atoms to form a mixture of corner, face, and edge-sharing YY12 cuboctahedra.
Y is alpha Samarium structured and crystallizes in the trigonal R-3m space group. There are three inequivalent Y sites. In the first Y site, Y(1) is bonded to six equivalent Y(1) and six equivalent Y(2) atoms to form a mixture of corner, face, and edge-sharing YY12 cuboctahedra. All Y(1)-Y(1) bond lengths are 3.65 Å. All Y(1)-Y(2) bond lengths are 3.61 Å. In the second Y site, Y(2) is bonded to three equivalent Y(1) and nine Y(2,2) atoms to form a mixture of corner, face, and edge-sharing YY12 cuboctahedra. There are three shorter (3.54 Å) and six longer (3.65 Å) Y(2)-Y(2,2) bond lengths. In the third Y site, Y(2) is bonded to three equivalent Y(1) and nine Y(2,2) atoms to form a mixture of corner, face, and edge-sharing YY12 cuboctahedra. All Y(2)-Y(1) bond lengths are 3.61 Å. All Y(2)-Y(2) bond lengths are 3.65 Å.