CoAs2 is zeta iron carbide structured and crystallizes in the orthorhombic Pnnm space group. Co(1) is bonded to six equivalent As(1) atoms to form a mixture of corner and edge-sharing CoAs6 octahedra. The corner-sharing octahedral tilt angles are 55°. As(1) is bonded in a 4-coordinate geometry to three equivalent Co(1) and one As(1) atom.
CoAs2 is zeta iron carbide structured and crystallizes in the orthorhombic Pnnm space group. Co(1) is bonded to six equivalent As(1) atoms to form a mixture of corner and edge-sharing CoAs6 octahedra. The corner-sharing octahedral tilt angles are 55°. There are two shorter (2.34 Å) and four longer (2.35 Å) Co(1)-As(1) bond lengths. As(1) is bonded in a 4-coordinate geometry to three equivalent Co(1) and one As(1) atom. The As(1)-As(1) bond length is 2.47 Å.