FePb4As2(O2Cl)4 crystallizes in the triclinic P-1 space group. Fe(1) is bonded in a distorted square co-planar geometry to two equivalent O(3), two equivalent O(4), and two equivalent Cl(2) atoms. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 7-coordinate geometry to two equivalent O(1), two equivalent O(2), and three equivalent Cl(1) atoms. In the second Pb site, Pb(2) is bonded in a 3-coordinate geometry to one O(1), one O(2), and one O(4) atom. As(1) is bonded in a distorted T-shaped geometry to one O(1), one O(2), and one O(3) atom. There are four 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 a mixture of distorted corner and edge-sharing OAsPb3 tetrahedra. In the second O site, O(2) is bonded to one Pb(2), two equivalent Pb(1), and one As(1) atom to form a mixture of distorted corner and edge-sharing OAsPb3 tetrahedra. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Fe(1) and one As(1) atom. In the fourth O site, O(4) is bonded in a distorted water-like geometry to one Fe(1) and one Pb(2) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Pb(1) atoms. In the second Cl site, Cl(2) is bonded in a single-bond geometry to one Fe(1) atom.
FePb4As2(O2Cl)4 crystallizes in the triclinic P-1 space group. Fe(1) is bonded in a distorted square co-planar geometry to two equivalent O(3), two equivalent O(4), and two equivalent Cl(2) atoms. Both Fe(1)-O(3) bond lengths are 1.91 Å. Both Fe(1)-O(4) bond lengths are 1.83 Å. Both Fe(1)-Cl(2) bond lengths are 2.65 Å. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 7-coordinate geometry to two equivalent O(1), two equivalent O(2), and three equivalent Cl(1) atoms. There is one shorter (2.49 Å) and one longer (2.64 Å) Pb(1)-O(1) bond length. There is one shorter (2.50 Å) and one longer (2.60 Å) Pb(1)-O(2) bond length. There are a spread of Pb(1)-Cl(1) bond distances ranging from 3.01-3.10 Å. In the second Pb site, Pb(2) is bonded in a 3-coordinate geometry to one O(1), one O(2), and one O(4) atom. The Pb(2)-O(1) bond length is 2.54 Å. The Pb(2)-O(2) bond length is 2.46 Å. The Pb(2)-O(4) bond length is 2.35 Å. As(1) is bonded in a distorted T-shaped geometry to one O(1), one O(2), and one O(3) atom. The As(1)-O(1) bond length is 1.80 Å. The As(1)-O(2) bond length is 1.82 Å. The As(1)-O(3) bond length is 1.81 Å. There are four 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 a mixture of distorted corner and edge-sharing OAsPb3 tetrahedra. In the second O site, O(2) is bonded to one Pb(2), two equivalent Pb(1), and one As(1) atom to form a mixture of distorted corner and edge-sharing OAsPb3 tetrahedra. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Fe(1) and one As(1) atom. In the fourth O site, O(4) is bonded in a distorted water-like geometry to one Fe(1) and one Pb(2) atom. There are two inequivalent Cl sites. In the first Cl site, Cl(1) is bonded in a distorted trigonal non-coplanar geometry to three equivalent Pb(1) atoms. In the second Cl site, Cl(2) is bonded in a single-bond geometry to one Fe(1) atom.