SmPrO2 is Caswellsilverite-like structured and crystallizes in the tetragonal I4_1/amd space group. Sm(1) is bonded to six O(1,1,1) atoms to form SmO6 octahedra that share corners with two equivalent Pr(1)O6 octahedra, corners with four equivalent Sm(1)O6 octahedra, edges with four equivalent Sm(1)O6 octahedra, and edges with eight equivalent Pr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. Pr(1) is bonded to six O(1,1) atoms to form PrO6 octahedra that share corners with two equivalent Sm(1)O6 octahedra, corners with four equivalent Pr(1)O6 octahedra, edges with four equivalent Pr(1)O6 octahedra, and edges with eight equivalent Sm(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. There are three inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Sm(1) and three equivalent Pr(1) atoms to form a mixture of edge and corner-sharing OPr3Sm3 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the second O site, O(1) is bonded to three equivalent Sm(1) and three equivalent Pr(1) atoms to form a mixture of edge and corner-sharing OPr3Sm3 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the third O site, O(1) is bonded to three equivalent Sm(1) and three equivalent Pr(1) atoms to form a mixture of edge and corner-sharing OPr3Sm3 octahedra. The corner-sharing octahedral tilt angles range from 0-3°.
SmPrO2 is Caswellsilverite-like structured and crystallizes in the tetragonal I4_1/amd space group. Sm(1) is bonded to six O(1,1,1) atoms to form SmO6 octahedra that share corners with two equivalent Pr(1)O6 octahedra, corners with four equivalent Sm(1)O6 octahedra, edges with four equivalent Sm(1)O6 octahedra, and edges with eight equivalent Pr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. There are two shorter (2.46 Å) and four longer (2.52 Å) Sm(1)-O(1,1,1) bond lengths. Pr(1) is bonded to six O(1,1) atoms to form PrO6 octahedra that share corners with two equivalent Sm(1)O6 octahedra, corners with four equivalent Pr(1)O6 octahedra, edges with four equivalent Pr(1)O6 octahedra, and edges with eight equivalent Sm(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. There are four shorter (2.52 Å) and two longer (2.57 Å) Pr(1)-O(1,1) bond lengths. There are three inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Sm(1) and three equivalent Pr(1) atoms to form a mixture of edge and corner-sharing OPr3Sm3 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. In the second O site, O(1) is bonded to three equivalent Sm(1) and three equivalent Pr(1) atoms to form a mixture of edge and corner-sharing OPr3Sm3 octahedra. The corner-sharing octahedral tilt angles range from 0-3°. There are two shorter (2.52 Å) and one longer (2.57 Å) O(1)-Pr(1) bond length. In the third O site, O(1) is bonded to three equivalent Sm(1) and three equivalent Pr(1) atoms to form a mixture of edge and corner-sharing OPr3Sm3 octahedra. The corner-sharing octahedral tilt angles range from 0-3°.