FeAs2 is zeta iron carbide structured and crystallizes in the orthorhombic Pnnm space group. Fe(1) is bonded to six equivalent As(1) atoms to form a mixture of corner and edge-sharing FeAs6 octahedra. The corner-sharing octahedral tilt angles are 53°. As(1) is bonded in a 3-coordinate geometry to three equivalent Fe(1) atoms.
FeAs2 is zeta iron carbide structured and crystallizes in the orthorhombic Pnnm space group. Fe(1) is bonded to six equivalent As(1) atoms to form a mixture of corner and edge-sharing FeAs6 octahedra. The corner-sharing octahedral tilt angles are 53°. All Fe(1)-As(1) bond lengths are 2.36 Å. As(1) is bonded in a 3-coordinate geometry to three equivalent Fe(1) atoms.