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AuN2 crystallizes in the orthorhombic Pnnm space group. The structure is one-dimensional and consists of two AuN2 ribbons oriented in the (0, 1, 0) direction. Au5+ is bonded in a linear geometry to two equivalent N+2.50- atoms. Both Au–N bond lengths are 2.15 Å. N+2.50- is bonded in a bent 120 degrees geometry to one Au5+ and one N+2.50- atom. The N–N bond length is 1.17 Å.
AuN2 crystallizes in the cubic Pa-3 space group. The structure is three-dimensional. Au5+ is bonded to six equivalent N+2.50- atoms to form AuN6 octahedra that share corners with twelve equivalent AuN6 octahedra and corners with six equivalent NAu3N tetrahedra. The corner-sharing octahedral tilt angles are 76°. All Au–N bond lengths are 2.53 Å. N+2.50- is bonded to three equivalent Au5+ and one N+2.50- atom to form NAu3N tetrahedra that share corners with three equivalent AuN6 octahedra and corners with fifteen equivalent NAu3N tetrahedra. The corner-sharing octahedral tilt angles are 66°. The N–N bond length is 1.18 Å.