Pb3(AsO4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. In the second Pb site, Pb(2) is bonded in a distorted pentagonal planar geometry to one O(1), one O(2), one O(4), and two equivalent O(3) atoms. As(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Pb(1), one Pb(2), and one As(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Pb(1), one Pb(2), and one As(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Pb(1), two equivalent Pb(2), and one As(1) atom. In the fourth O site, O(4) is bonded in a 1-coordinate geometry to one Pb(1), one Pb(2), and one As(1) atom.
Pb3(AsO4)2 crystallizes in the monoclinic P2_1/c space group. There are two inequivalent Pb sites. In the first Pb site, Pb(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Both Pb(1)-O(1) bond lengths are 2.61 Å. Both Pb(1)-O(2) bond lengths are 2.61 Å. Both Pb(1)-O(3) bond lengths are 2.77 Å. Both Pb(1)-O(4) bond lengths are 2.76 Å. In the second Pb site, Pb(2) is bonded in a distorted pentagonal planar geometry to one O(1), one O(2), one O(4), and two equivalent O(3) atoms. The Pb(2)-O(1) bond length is 2.67 Å. The Pb(2)-O(2) bond length is 2.38 Å. The Pb(2)-O(4) bond length is 2.40 Å. There is one shorter (2.41 Å) and one longer (2.70 Å) Pb(2)-O(3) bond length. As(1) is bonded in a tetrahedral geometry to one O(1), one O(2), one O(3), and one O(4) atom. The As(1)-O(1) bond length is 1.69 Å. The As(1)-O(2) bond length is 1.72 Å. The As(1)-O(3) bond length is 1.72 Å. The As(1)-O(4) bond length is 1.69 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted single-bond geometry to one Pb(1), one Pb(2), and one As(1) atom. In the second O site, O(2) is bonded in a distorted trigonal non-coplanar geometry to one Pb(1), one Pb(2), and one As(1) atom. In the third O site, O(3) is bonded in a distorted single-bond geometry to one Pb(1), two equivalent Pb(2), and one As(1) atom. In the fourth O site, O(4) is bonded in a 1-coordinate geometry to one Pb(1), one Pb(2), and one As(1) atom.