BPbAsO5 crystallizes in the trigonal P3_1 space group. B(1) is bonded to one O(3), one O(5), and two equivalent O(1) atoms to form BO4 tetrahedra that share corners with two equivalent B(1)O4 tetrahedra and corners with two equivalent As(1)O4 tetrahedra. Pb(1) is bonded in a 8-coordinate geometry to one O(1), one O(5), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. As(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form AsO4 tetrahedra that share corners with two equivalent B(1)O4 tetrahedra. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent B(1) and one Pb(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Pb(1) and one As(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one B(1), two equivalent Pb(1), and one As(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Pb(1) and one As(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one B(1), one Pb(1), and one As(1) atom.
BPbAsO5 crystallizes in the trigonal P3_1 space group. B(1) is bonded to one O(3), one O(5), and two equivalent O(1) atoms to form BO4 tetrahedra that share corners with two equivalent B(1)O4 tetrahedra and corners with two equivalent As(1)O4 tetrahedra. The B(1)-O(3) bond length is 1.53 Å. The B(1)-O(5) bond length is 1.54 Å. Both B(1)-O(1) bond lengths are 1.45 Å. Pb(1) is bonded in a 8-coordinate geometry to one O(1), one O(5), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. The Pb(1)-O(1) bond length is 2.68 Å. The Pb(1)-O(5) bond length is 2.77 Å. There is one shorter (2.58 Å) and one longer (2.69 Å) Pb(1)-O(2) bond length. There is one shorter (2.84 Å) and one longer (2.86 Å) Pb(1)-O(3) bond length. There is one shorter (2.55 Å) and one longer (2.76 Å) Pb(1)-O(4) bond length. As(1) is bonded to one O(2), one O(3), one O(4), and one O(5) atom to form AsO4 tetrahedra that share corners with two equivalent B(1)O4 tetrahedra. The As(1)-O(2) bond length is 1.69 Å. The As(1)-O(3) bond length is 1.77 Å. The As(1)-O(4) bond length is 1.69 Å. The As(1)-O(5) bond length is 1.77 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 120 degrees geometry to two equivalent B(1) and one Pb(1) atom. In the second O site, O(2) is bonded in a distorted single-bond geometry to two equivalent Pb(1) and one As(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one B(1), two equivalent Pb(1), and one As(1) atom. In the fourth O site, O(4) is bonded in a distorted single-bond geometry to two equivalent Pb(1) and one As(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one B(1), one Pb(1), and one As(1) atom.