AgHgAsO4 crystallizes in the orthorhombic Fdd2 space group. Ag(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. Hg(1) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. As(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ag(1), one Hg(1), and one As(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Ag(1), one Hg(1), and one As(1) atom.
AgHgAsO4 crystallizes in the orthorhombic Fdd2 space group. Ag(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. Both Ag(1)-O(1) bond lengths are 2.66 Å. There are two shorter (2.25 Å) and two longer (2.73 Å) Ag(1)-O(2) bond lengths. Hg(1) is bonded in a 4-coordinate geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Hg(1)-O(1) bond lengths are 2.22 Å. Both Hg(1)-O(2) bond lengths are 2.53 Å. As(1) is bonded in a tetrahedral geometry to two equivalent O(1) and two equivalent O(2) atoms. Both As(1)-O(1) bond lengths are 1.75 Å. Both As(1)-O(2) bond lengths are 1.72 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Ag(1), one Hg(1), and one As(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Ag(1), one Hg(1), and one As(1) atom.