Cr3C2 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent C(1) and two equivalent C(2) atoms to form corner-sharing CrC4 tetrahedra. In the second Cr site, Cr(2) is bonded in a 5-coordinate geometry to two equivalent C(2) and three equivalent C(1) atoms. There are two inequivalent C sites. In the first C site, C(1) is bonded in a 8-coordinate geometry to two equivalent Cr(1) and six equivalent Cr(2) atoms. In the second C site, C(2) is bonded to two equivalent Cr(1) and four equivalent Cr(2) atoms to form a mixture of edge and corner-sharing CCr6 octahedra. The corner-sharing octahedral tilt angles are 56°.
Cr3C2 crystallizes in the orthorhombic Cmcm space group. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to two equivalent C(1) and two equivalent C(2) atoms to form corner-sharing CrC4 tetrahedra. Both Cr(1)-C(1) bond lengths are 1.94 Å. Both Cr(1)-C(2) bond lengths are 1.94 Å. In the second Cr site, Cr(2) is bonded in a 5-coordinate geometry to two equivalent C(2) and three equivalent C(1) atoms. Both Cr(2)-C(2) bond lengths are 1.98 Å. There are two shorter (2.13 Å) and one longer (2.38 Å) Cr(2)-C(1) bond length. There are two inequivalent C sites. In the first C site, C(1) is bonded in a 8-coordinate geometry to two equivalent Cr(1) and six equivalent Cr(2) atoms. In the second C site, C(2) is bonded to two equivalent Cr(1) and four equivalent Cr(2) atoms to form a mixture of edge and corner-sharing CCr6 octahedra. The corner-sharing octahedral tilt angles are 56°.