PbAs2O4 crystallizes in the monoclinic P2_1/c space group. Pb(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(3) and two equivalent O(4) atoms. There are two inequivalent As sites. In the first As site, As(1) is bonded in a distorted trigonal non-coplanar geometry to one O(1), one O(2), and one O(3) atom. In the second As site, As(2) is bonded in a distorted T-shaped geometry to one O(1), one O(2), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one As(1) and one As(2) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one As(1) and one As(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Pb(1) and one As(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Pb(1) and one As(2) atom.
PbAs2O4 crystallizes in the monoclinic P2_1/c space group. Pb(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(3) and two equivalent O(4) atoms. There is one shorter (2.32 Å) and one longer (2.51 Å) Pb(1)-O(3) bond length. There is one shorter (2.27 Å) and one longer (2.48 Å) Pb(1)-O(4) bond length. There are two inequivalent As sites. In the first As site, As(1) is bonded in a distorted trigonal non-coplanar 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 1.75 Å. In the second As site, As(2) is bonded in a distorted T-shaped geometry to one O(1), one O(2), and one O(4) atom. The As(2)-O(1) bond length is 1.84 Å. The As(2)-O(2) bond length is 1.83 Å. The As(2)-O(4) bond length is 1.75 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a bent 120 degrees geometry to one As(1) and one As(2) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one As(1) and one As(2) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Pb(1) and one As(1) atom. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Pb(1) and one As(2) atom.