AgHg3As2Cl3 crystallizes in the monoclinic C2/c space group. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to two equivalent Cl(3) and two equivalent Cl(5) atoms to form distorted AgCl4 trigonal pyramids that share  an edgeedge with one Hg(2)As2Cl2 trigonal pyramid. In the second Ag site, Ag(2) is bonded in a rectangular see-saw-like geometry to one Cl(1), one Cl(2), one Cl(3), and one Cl(4) atom. There are six inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a linear geometry to one As(1) and one As(3) atom. In the second Hg site, Hg(2) is bonded to two equivalent As(2) and two equivalent Cl(3) atoms to form distorted HgAs2Cl2 trigonal pyramids that share corners with two equivalent As(3)Hg3As tetrahedra and  an edgeedge with one Ag(1)Cl4 trigonal pyramid. In the third Hg site, Hg(3) is bonded to one As(1), one As(3), one Cl(1), and one Cl(4) atom to form distorted HgAs2Cl2 trigonal pyramids that share  a cornercorner with one As(1)Hg3As tetrahedra and  a cornercorner with one As(2)Hg3As tetrahedra. In the fourth Hg site, Hg(4) is bonded in a distorted linear geometry to one As(1) and one As(2) atom. In the fifth Hg site, Hg(5) is bonded in a linear geometry to two equivalent As(2) atoms. In the sixth Hg site, Hg(6) is bonded in a linear geometry to two equivalent As(3) atoms. There are three inequivalent As sites. In the first As site, As(1) is bonded to one Hg(1), one Hg(3), one Hg(4), and one As(1) atom to form AsHg3As tetrahedra that share  a cornercorner with one As(2)Hg3As tetrahedra, corners with two equivalent As(3)Hg3As tetrahedra, and  a cornercorner with one Hg(3)As2Cl2 trigonal pyramid. In the second As site, As(2) is bonded to one Hg(2), one Hg(4), one Hg(5), and one As(3) atom to form AsHg3As tetrahedra that share  a cornercorner with one As(1)Hg3As tetrahedra, corners with two equivalent As(2)Hg3As tetrahedra, and  a cornercorner with one Hg(3)As2Cl2 trigonal pyramid. In the third As site, As(3) is bonded to one Hg(1), one Hg(3), one Hg(6), and one As(2) atom to form AsHg3As tetrahedra that share  a cornercorner with one As(3)Hg3As tetrahedra, corners with two equivalent As(1)Hg3As tetrahedra, and  a cornercorner with one Hg(2)As2Cl2 trigonal pyramid. There are five inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a water-like geometry to one Ag(2) and one Hg(3) atom. In the second Cl site, Cl(2) is bonded in a distorted linear geometry to two equivalent Ag(2) atoms. In the third Cl site, Cl(3) is bonded in a T-shaped geometry to one Ag(1), one Ag(2), and one Hg(2) atom. In the fourth Cl site, Cl(4) is bonded in a bent 120 degrees geometry to one Ag(2) and one Hg(3) atom. In the fifth Cl site, Cl(5) is bonded in a single-bond geometry to one Ag(1) atom.
AgHg3As2Cl3 crystallizes in the monoclinic C2/c space group. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to two equivalent Cl(3) and two equivalent Cl(5) atoms to form distorted AgCl4 trigonal pyramids that share  an edgeedge with one Hg(2)As2Cl2 trigonal pyramid. Both Ag(1)-Cl(3) bond lengths are 2.91 Å. Both Ag(1)-Cl(5) bond lengths are 2.49 Å. In the second Ag site, Ag(2) is bonded in a rectangular see-saw-like geometry to one Cl(1), one Cl(2), one Cl(3), and one Cl(4) atom. The Ag(2)-Cl(1) bond length is 2.50 Å. The Ag(2)-Cl(2) bond length is 2.86 Å. The Ag(2)-Cl(3) bond length is 2.85 Å. The Ag(2)-Cl(4) bond length is 2.50 Å. There are six inequivalent Hg sites. In the first Hg site, Hg(1) is bonded in a linear geometry to one As(1) and one As(3) atom. The Hg(1)-As(1) bond length is 2.57 Å. The Hg(1)-As(3) bond length is 2.57 Å. In the second Hg site, Hg(2) is bonded to two equivalent As(2) and two equivalent Cl(3) atoms to form distorted HgAs2Cl2 trigonal pyramids that share corners with two equivalent As(3)Hg3As tetrahedra and  an edgeedge with one Ag(1)Cl4 trigonal pyramid. Both Hg(2)-As(2) bond lengths are 2.58 Å. Both Hg(2)-Cl(3) bond lengths are 2.84 Å. In the third Hg site, Hg(3) is bonded to one As(1), one As(3), one Cl(1), and one Cl(4) atom to form distorted HgAs2Cl2 trigonal pyramids that share  a cornercorner with one As(1)Hg3As tetrahedra and  a cornercorner with one As(2)Hg3As tetrahedra. The Hg(3)-As(1) bond length is 2.58 Å. The Hg(3)-As(3) bond length is 2.57 Å. The Hg(3)-Cl(1) bond length is 2.83 Å. The Hg(3)-Cl(4) bond length is 2.95 Å. In the fourth Hg site, Hg(4) is bonded in a distorted linear geometry to one As(1) and one As(2) atom. The Hg(4)-As(1) bond length is 2.56 Å. The Hg(4)-As(2) bond length is 2.56 Å. In the fifth Hg site, Hg(5) is bonded in a linear geometry to two equivalent As(2) atoms. Both Hg(5)-As(2) bond lengths are 2.55 Å. In the sixth Hg site, Hg(6) is bonded in a linear geometry to two equivalent As(3) atoms. Both Hg(6)-As(3) bond lengths are 2.57 Å. There are three inequivalent As sites. In the first As site, As(1) is bonded to one Hg(1), one Hg(3), one Hg(4), and one As(1) atom to form AsHg3As tetrahedra that share  a cornercorner with one As(2)Hg3As tetrahedra, corners with two equivalent As(3)Hg3As tetrahedra, and  a cornercorner with one Hg(3)As2Cl2 trigonal pyramid. The As(1)-As(1) bond length is 2.43 Å. In the second As site, As(2) is bonded to one Hg(2), one Hg(4), one Hg(5), and one As(3) atom to form AsHg3As tetrahedra that share  a cornercorner with one As(1)Hg3As tetrahedra, corners with two equivalent As(2)Hg3As tetrahedra, and  a cornercorner with one Hg(3)As2Cl2 trigonal pyramid. The As(2)-As(3) bond length is 2.44 Å. In the third As site, As(3) is bonded to one Hg(1), one Hg(3), one Hg(6), and one As(2) atom to form AsHg3As tetrahedra that share  a cornercorner with one As(3)Hg3As tetrahedra, corners with two equivalent As(1)Hg3As tetrahedra, and  a cornercorner with one Hg(2)As2Cl2 trigonal pyramid. There are five inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a water-like geometry to one Ag(2) and one Hg(3) atom. In the second Cl site, Cl(2) is bonded in a distorted linear geometry to two equivalent Ag(2) atoms. In the third Cl site, Cl(3) is bonded in a T-shaped geometry to one Ag(1), one Ag(2), and one Hg(2) atom. In the fourth Cl site, Cl(4) is bonded in a bent 120 degrees geometry to one Ag(2) and one Hg(3) atom. In the fifth Cl site, Cl(5) is bonded in a single-bond geometry to one Ag(1) atom.