U2CrN3 crystallizes in the orthorhombic Immm space group. U(1) is bonded in a 7-coordinate geometry to two equivalent N(2) and five equivalent N(1) atoms. Cr(1) is bonded in a square co-planar geometry to two equivalent N(1) and two equivalent N(2) atoms. There are two inequivalent N sites. In the first N site, N(2) is bonded to four equivalent U(1) and two equivalent Cr(1) atoms to form NU4Cr2 octahedra that share corners with two equivalent N(2)U4Cr2 octahedra, corners with twelve equivalent N(1)U5Cr octahedra, edges with two equivalent N(2)U4Cr2 octahedra, and faces with four equivalent N(1)U5Cr octahedra. The corner-sharing octahedral tilt angles range from 0-58°. In the second N site, N(1) is bonded to five equivalent U(1) and one Cr(1) atom to form NU5Cr octahedra that share corners with five equivalent N(1)U5Cr octahedra, corners with six equivalent N(2)U4Cr2 octahedra, edges with eight equivalent N(1)U5Cr octahedra, and faces with two equivalent N(2)U4Cr2 octahedra. The corner-sharing octahedral tilt angles range from 0-58°.
U2CrN3 crystallizes in the orthorhombic Immm space group. U(1) is bonded in a 7-coordinate geometry to two equivalent N(2) and five equivalent N(1) atoms. Both U(1)-N(2) bond lengths are 2.45 Å. There is one shorter (2.27 Å) and four longer (2.54 Å) U(1)-N(1) bond lengths. Cr(1) is bonded in a square co-planar geometry to two equivalent N(1) and two equivalent N(2) atoms. Both Cr(1)-N(1) bond lengths are 2.09 Å. Both Cr(1)-N(2) bond lengths are 1.89 Å. There are two inequivalent N sites. In the first N site, N(2) is bonded to four equivalent U(1) and two equivalent Cr(1) atoms to form NU4Cr2 octahedra that share corners with two equivalent N(2)U4Cr2 octahedra, corners with twelve equivalent N(1)U5Cr octahedra, edges with two equivalent N(2)U4Cr2 octahedra, and faces with four equivalent N(1)U5Cr octahedra. The corner-sharing octahedral tilt angles range from 0-58°. In the second N site, N(1) is bonded to five equivalent U(1) and one Cr(1) atom to form NU5Cr octahedra that share corners with five equivalent N(1)U5Cr octahedra, corners with six equivalent N(2)U4Cr2 octahedra, edges with eight equivalent N(1)U5Cr octahedra, and faces with two equivalent N(2)U4Cr2 octahedra. The corner-sharing octahedral tilt angles range from 0-58°.