Hg3AsO4Br crystallizes in the cubic P2_13 space group. Hg(1) is bonded in a 2-coordinate geometry to two equivalent O(1) and one Br(1) atom. As(1) is bonded in a tetrahedral geometry to one O(2) and three equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Hg(1) and one As(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one As(1) atom. Br(1) is bonded in a distorted T-shaped geometry to three equivalent Hg(1) atoms.
Hg3AsO4Br crystallizes in the cubic P2_13 space group. Hg(1) is bonded in a 2-coordinate geometry to two equivalent O(1) and one Br(1) atom. There is one shorter (2.29 Å) and one longer (2.41 Å) Hg(1)-O(1) bond length. The Hg(1)-Br(1) bond length is 2.95 Å. As(1) is bonded in a tetrahedral geometry to one O(2) and three equivalent O(1) atoms. The As(1)-O(2) bond length is 1.71 Å. All As(1)-O(1) bond lengths are 1.75 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Hg(1) and one As(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one As(1) atom. Br(1) is bonded in a distorted T-shaped geometry to three equivalent Hg(1) atoms.