FeO is Halite, Rock Salt-like structured and crystallizes in the triclinic P-1 space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to six equivalent O(1) atoms to form a mixture of corner and edge-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 4-5°. In the second Fe site, Fe(2) is bonded to six equivalent O(1) atoms to form a mixture of corner and edge-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 4-5°. O(1) is bonded to three equivalent Fe(1) and three equivalent Fe(2) atoms to form a mixture of corner and edge-sharing OFe6 octahedra. The corner-sharing octahedra are not tilted.
FeO is Halite, Rock Salt-like structured and crystallizes in the triclinic P-1 space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to six equivalent O(1) atoms to form a mixture of corner and edge-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 4-5°. There are a spread of Fe(1)-O(1) bond distances ranging from 2.09-2.27 Å. In the second Fe site, Fe(2) is bonded to six equivalent O(1) atoms to form a mixture of corner and edge-sharing FeO6 octahedra. The corner-sharing octahedral tilt angles range from 4-5°. There are a spread of Fe(2)-O(1) bond distances ranging from 2.15-2.25 Å. O(1) is bonded to three equivalent Fe(1) and three equivalent Fe(2) atoms to form a mixture of corner and edge-sharing OFe6 octahedra. The corner-sharing octahedra are not tilted.