Pb5As3O9Cl crystallizes in the hexagonal P6_3/m space group. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 3-coordinate geometry to three equivalent O(1) atoms. In the second Pb site, Pb(2) is bonded in a 5-coordinate geometry to one O(1), four equivalent O(2), and two equivalent Cl(1) atoms. As(1) is bonded in a distorted T-shaped geometry to one O(1) and two equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Pb(2), two equivalent Pb(1), and one As(1) atom to form distorted OAsPb3 tetrahedra that share corners with two equivalent Cl(1)Pb6 octahedra and edges with two equivalent O(1)AsPb3 tetrahedra. The corner-sharing octahedral tilt angles are 37°. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Pb(2) and one As(1) atom. Cl(1) is bonded to six equivalent Pb(2) atoms to form ClPb6 octahedra that share corners with six equivalent O(1)AsPb3 tetrahedra and faces with two equivalent Cl(1)Pb6 octahedra.
Pb5As3O9Cl crystallizes in the hexagonal P6_3/m space group. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 3-coordinate geometry to three equivalent O(1) atoms. All Pb(1)-O(1) bond lengths are 2.43 Å. In the second Pb site, Pb(2) is bonded in a 5-coordinate geometry to one O(1), four equivalent O(2), and two equivalent Cl(1) atoms. The Pb(2)-O(1) bond length is 2.49 Å. There are two shorter (2.55 Å) and two longer (2.65 Å) Pb(2)-O(2) bond lengths. Both Pb(2)-Cl(1) bond lengths are 3.18 Å. As(1) is bonded in a distorted T-shaped geometry to one O(1) and two equivalent O(2) atoms. The As(1)-O(1) bond length is 1.85 Å. Both As(1)-O(2) bond lengths are 1.78 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Pb(2), two equivalent Pb(1), and one As(1) atom to form distorted OAsPb3 tetrahedra that share corners with two equivalent Cl(1)Pb6 octahedra and edges with two equivalent O(1)AsPb3 tetrahedra. The corner-sharing octahedral tilt angles are 37°. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Pb(2) and one As(1) atom. Cl(1) is bonded to six equivalent Pb(2) atoms to form ClPb6 octahedra that share corners with six equivalent O(1)AsPb3 tetrahedra and faces with two equivalent Cl(1)Pb6 octahedra.