CaEuO2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Ca(1) is bonded to six equivalent O(1) atoms to form CaO6 octahedra that share corners with six equivalent Eu(1)O6 octahedra, edges with six equivalent Ca(1)O6 octahedra, and edges with six equivalent Eu(1)O6 octahedra. The corner-sharing octahedral tilt angles are 3°. Eu(1) is bonded to six equivalent O(1) atoms to form EuO6 octahedra that share corners with six equivalent Ca(1)O6 octahedra, edges with six equivalent Ca(1)O6 octahedra, and edges with six equivalent Eu(1)O6 octahedra. The corner-sharing octahedral tilt angles are 3°. O(1) is bonded to three equivalent Ca(1) and three equivalent Eu(1) atoms to form a mixture of corner and edge-sharing OCa3Eu3 octahedra. The corner-sharing octahedra are not tilted.
CaEuO2 is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Ca(1) is bonded to six equivalent O(1) atoms to form CaO6 octahedra that share corners with six equivalent Eu(1)O6 octahedra, edges with six equivalent Ca(1)O6 octahedra, and edges with six equivalent Eu(1)O6 octahedra. The corner-sharing octahedral tilt angles are 3°. All Ca(1)-O(1) bond lengths are 2.44 Å. Eu(1) is bonded to six equivalent O(1) atoms to form EuO6 octahedra that share corners with six equivalent Ca(1)O6 octahedra, edges with six equivalent Ca(1)O6 octahedra, and edges with six equivalent Eu(1)O6 octahedra. The corner-sharing octahedral tilt angles are 3°. All Eu(1)-O(1) bond lengths are 2.53 Å. O(1) is bonded to three equivalent Ca(1) and three equivalent Eu(1) atoms to form a mixture of corner and edge-sharing OCa3Eu3 octahedra. The corner-sharing octahedra are not tilted.