CrCu2N3 is Enargite-like structured and crystallizes in the orthorhombic Cmc2_1 space group. Cr(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form CrN4 tetrahedra that share corners with two equivalent Cr(1)N4 tetrahedra and corners with ten equivalent Cu(1)N4 tetrahedra. Cu(1) is bonded to one N(2) and three equivalent N(1) atoms to form CuN4 tetrahedra that share corners with five equivalent Cr(1)N4 tetrahedra and corners with seven equivalent Cu(1)N4 tetrahedra. There are two inequivalent N sites. In the first N site, N(2) is bonded to two equivalent Cr(1) and two equivalent Cu(1) atoms to form distorted NCr2Cu2 tetrahedra that share corners with two equivalent N(2)Cr2Cu2 tetrahedra and corners with ten equivalent N(1)CrCu3 tetrahedra. In the second N site, N(1) is bonded to one Cr(1) and three equivalent Cu(1) atoms to form NCrCu3 tetrahedra that share corners with five equivalent N(2)Cr2Cu2 tetrahedra and corners with seven equivalent N(1)CrCu3 tetrahedra.
CrCu2N3 is Enargite-like structured and crystallizes in the orthorhombic Cmc2_1 space group. Cr(1) is bonded to two equivalent N(1) and two equivalent N(2) atoms to form CrN4 tetrahedra that share corners with two equivalent Cr(1)N4 tetrahedra and corners with ten equivalent Cu(1)N4 tetrahedra. Both Cr(1)-N(1) bond lengths are 1.74 Å. There is one shorter (1.83 Å) and one longer (1.85 Å) Cr(1)-N(2) bond length. Cu(1) is bonded to one N(2) and three equivalent N(1) atoms to form CuN4 tetrahedra that share corners with five equivalent Cr(1)N4 tetrahedra and corners with seven equivalent Cu(1)N4 tetrahedra. The Cu(1)-N(2) bond length is 2.02 Å. There is one shorter (1.97 Å) and two longer (2.00 Å) Cu(1)-N(1) bond lengths. There are two inequivalent N sites. In the first N site, N(2) is bonded to two equivalent Cr(1) and two equivalent Cu(1) atoms to form distorted NCr2Cu2 tetrahedra that share corners with two equivalent N(2)Cr2Cu2 tetrahedra and corners with ten equivalent N(1)CrCu3 tetrahedra. In the second N site, N(1) is bonded to one Cr(1) and three equivalent Cu(1) atoms to form NCrCu3 tetrahedra that share corners with five equivalent N(2)Cr2Cu2 tetrahedra and corners with seven equivalent N(1)CrCu3 tetrahedra.