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AsNO4 crystallizes in the tetragonal I4_1/amd space group. The structure is three-dimensional and consists of two AsNO4 frameworks. As5+ is bonded in a 12-coordinate geometry to four equivalent O2- atoms. All As–O bond lengths are 2.27 Å. N3+ is bonded in a tetrahedral geometry to four equivalent O2- atoms. All N–O bond lengths are 1.39 Å. O2- is bonded in a 2-coordinate geometry to one As5+ and one N3+ atom.
AsNO4 crystallizes in the tetragonal I-42d space group. The structure is one-dimensional and consists of four AsNO4 ribbons oriented in the (0, 0, 1) direction. As5+ is bonded to four equivalent O2- atoms to form distorted AsO4 tetrahedra that share edges with two equivalent NO4 tetrahedra. All As–O bond lengths are 1.75 Å. N3+ is bonded to four equivalent O2- atoms to form distorted NO4 tetrahedra that share edges with two equivalent AsO4 tetrahedra. All N–O bond lengths are 1.78 Å. O2- is bonded in a distorted L-shaped geometry to one As5+ and one N3+ atom.