Ag5Hg4P8Cl5 crystallizes in the monoclinic C2/m space group. There are three inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent P(1) and two equivalent Cl(1) atoms. In the second Ag site, Ag(2) is bonded in a rectangular see-saw-like geometry to one P(2), one P(3), and two equivalent Cl(1) atoms. In the third Ag site, Ag(3) is bonded in a distorted square co-planar geometry to two equivalent Cl(2) and four equivalent Cl(1) atoms. Hg(1) is bonded in a T-shaped geometry to one P(1), one P(3), and one Cl(2) atom. There are three inequivalent P sites. In the first P site, P(1) is bonded to one Ag(1), one Hg(1), one P(1), and one P(2) atom to form PAgHgP2 tetrahedra that share  a cornercorner with one Cl(2)Ag2Hg4 octahedra,  a cornercorner with one P(2)AgP3 tetrahedra, corners with two equivalent P(3)AgHg2P tetrahedra, and corners with two equivalent P(1)AgHgP2 tetrahedra. The corner-sharing octahedral tilt angles are 84°. In the second P site, P(2) is bonded to one Ag(2), one P(3), and two equivalent P(1) atoms to form distorted PAgP3 tetrahedra that share  a cornercorner with one P(3)AgHg2P tetrahedra and corners with two equivalent P(1)AgHgP2 tetrahedra. In the third P site, P(3) is bonded to one Ag(2), two equivalent Hg(1), and one P(2) atom to form PAgHg2P tetrahedra that share  a cornercorner with one P(2)AgP3 tetrahedra, corners with four equivalent P(1)AgHgP2 tetrahedra, and  an edgeedge with one Cl(2)Ag2Hg4 octahedra. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a T-shaped geometry to one Ag(1), one Ag(2), and one Ag(3) atom. In the second Cl site, Cl(2) is bonded to two equivalent Ag(3) and four equivalent Hg(1) atoms to form distorted ClAg2Hg4 octahedra that share corners with two equivalent Cl(2)Ag2Hg4 octahedra, corners with four equivalent P(1)AgHgP2 tetrahedra, and edges with two equivalent P(3)AgHg2P tetrahedra. The corner-sharing octahedra are not tilted.
Ag5Hg4P8Cl5 crystallizes in the monoclinic C2/m space group. There are three inequivalent Ag sites. In the first Ag site, Ag(1) is bonded in a distorted rectangular see-saw-like geometry to two equivalent P(1) and two equivalent Cl(1) atoms. Both Ag(1)-P(1) bond lengths are 2.48 Å. Both Ag(1)-Cl(1) bond lengths are 2.90 Å. In the second Ag site, Ag(2) is bonded in a rectangular see-saw-like geometry to one P(2), one P(3), and two equivalent Cl(1) atoms. The Ag(2)-P(2) bond length is 2.44 Å. The Ag(2)-P(3) bond length is 2.45 Å. Both Ag(2)-Cl(1) bond lengths are 2.91 Å. In the third Ag site, Ag(3) is bonded in a distorted square co-planar geometry to two equivalent Cl(2) and four equivalent Cl(1) atoms. Both Ag(3)-Cl(2) bond lengths are 3.18 Å. All Ag(3)-Cl(1) bond lengths are 2.72 Å. Hg(1) is bonded in a T-shaped geometry to one P(1), one P(3), and one Cl(2) atom. The Hg(1)-P(1) bond length is 2.49 Å. The Hg(1)-P(3) bond length is 2.47 Å. The Hg(1)-Cl(2) bond length is 2.92 Å. There are three inequivalent P sites. In the first P site, P(1) is bonded to one Ag(1), one Hg(1), one P(1), and one P(2) atom to form PAgHgP2 tetrahedra that share  a cornercorner with one Cl(2)Ag2Hg4 octahedra,  a cornercorner with one P(2)AgP3 tetrahedra, corners with two equivalent P(3)AgHg2P tetrahedra, and corners with two equivalent P(1)AgHgP2 tetrahedra. The corner-sharing octahedral tilt angles are 84°. The P(1)-P(1) bond length is 2.22 Å. The P(1)-P(2) bond length is 2.21 Å. In the second P site, P(2) is bonded to one Ag(2), one P(3), and two equivalent P(1) atoms to form distorted PAgP3 tetrahedra that share  a cornercorner with one P(3)AgHg2P tetrahedra and corners with two equivalent P(1)AgHgP2 tetrahedra. The P(2)-P(3) bond length is 2.20 Å. In the third P site, P(3) is bonded to one Ag(2), two equivalent Hg(1), and one P(2) atom to form PAgHg2P tetrahedra that share  a cornercorner with one P(2)AgP3 tetrahedra, corners with four equivalent P(1)AgHgP2 tetrahedra, and  an edgeedge with one Cl(2)Ag2Hg4 octahedra. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a T-shaped geometry to one Ag(1), one Ag(2), and one Ag(3) atom. In the second Cl site, Cl(2) is bonded to two equivalent Ag(3) and four equivalent Hg(1) atoms to form distorted ClAg2Hg4 octahedra that share corners with two equivalent Cl(2)Ag2Hg4 octahedra, corners with four equivalent P(1)AgHgP2 tetrahedra, and edges with two equivalent P(3)AgHg2P tetrahedra. The corner-sharing octahedra are not tilted.