USmN2 is Caswellsilverite-like structured and crystallizes in the tetragonal P4/mmm space group. U(1) is bonded to two equivalent N(2) and four equivalent N(1) atoms to form UN6 octahedra that share corners with six equivalent U(1)N6 octahedra, edges with four equivalent U(1)N6 octahedra, and edges with eight equivalent Sm(1)N6 octahedra. The corner-sharing octahedra are not tilted. Sm(1) is bonded to two equivalent N(1) and four equivalent N(2) atoms to form SmN6 octahedra that share corners with six equivalent Sm(1)N6 octahedra, edges with four equivalent Sm(1)N6 octahedra, and edges with eight equivalent U(1)N6 octahedra. The corner-sharing octahedra are not tilted. There are two inequivalent N sites. In the first N site, N(1) is bonded to four equivalent U(1) and two equivalent Sm(1) atoms to form NSm2U4 octahedra that share corners with six equivalent N(1)Sm2U4 octahedra, edges with four equivalent N(1)Sm2U4 octahedra, and edges with eight equivalent N(2)Sm4U2 octahedra. The corner-sharing octahedra are not tilted. In the second N site, N(2) is bonded to two equivalent U(1) and four equivalent Sm(1) atoms to form NSm4U2 octahedra that share corners with six equivalent N(2)Sm4U2 octahedra, edges with four equivalent N(2)Sm4U2 octahedra, and edges with eight equivalent N(1)Sm2U4 octahedra. The corner-sharing octahedra are not tilted.
USmN2 is Caswellsilverite-like structured and crystallizes in the tetragonal P4/mmm space group. U(1) is bonded to two equivalent N(2) and four equivalent N(1) atoms to form UN6 octahedra that share corners with six equivalent U(1)N6 octahedra, edges with four equivalent U(1)N6 octahedra, and edges with eight equivalent Sm(1)N6 octahedra. The corner-sharing octahedra are not tilted. Both U(1)-N(2) bond lengths are 2.46 Å. All U(1)-N(1) bond lengths are 2.48 Å. Sm(1) is bonded to two equivalent N(1) and four equivalent N(2) atoms to form SmN6 octahedra that share corners with six equivalent Sm(1)N6 octahedra, edges with four equivalent Sm(1)N6 octahedra, and edges with eight equivalent U(1)N6 octahedra. The corner-sharing octahedra are not tilted. Both Sm(1)-N(1) bond lengths are 2.46 Å. All Sm(1)-N(2) bond lengths are 2.48 Å. There are two inequivalent N sites. In the first N site, N(1) is bonded to four equivalent U(1) and two equivalent Sm(1) atoms to form NSm2U4 octahedra that share corners with six equivalent N(1)Sm2U4 octahedra, edges with four equivalent N(1)Sm2U4 octahedra, and edges with eight equivalent N(2)Sm4U2 octahedra. The corner-sharing octahedra are not tilted. In the second N site, N(2) is bonded to two equivalent U(1) and four equivalent Sm(1) atoms to form NSm4U2 octahedra that share corners with six equivalent N(2)Sm4U2 octahedra, edges with four equivalent N(2)Sm4U2 octahedra, and edges with eight equivalent N(1)Sm2U4 octahedra. The corner-sharing octahedra are not tilted.