Fe2Pb(SeO3)4 crystallizes in the triclinic P1 space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in an octahedral geometry to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom. In the second Fe site, Fe(2) is bonded in an octahedral geometry to one O(10), one O(11), one O(12), one O(5), one O(6), and one O(9) atom. Pb(1) is bonded in a 6-coordinate geometry to one O(12), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. There are four inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(5), and one O(9) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(10), one O(2), and one O(6) atom. In the third Se site, Se(3) is bonded in a distorted trigonal non-coplanar geometry to one O(11), one O(3), and one O(7) atom. In the fourth Se site, Se(4) is bonded in a distorted trigonal non-coplanar geometry to one O(12), one O(4), and one O(8) atom. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Fe(1) and one Se(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Fe(1) and one Se(2) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Fe(1) and one Se(3) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Fe(1), one Pb(1), and one Se(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Fe(2), one Pb(1), and one Se(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Fe(2), one Pb(1), and one Se(2) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Fe(1), one Pb(1), and one Se(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Fe(1), one Pb(1), and one Se(4) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Fe(2) and one Se(1) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Fe(2) and one Se(2) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Fe(2) and one Se(3) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Fe(2), one Pb(1), and one Se(4) atom.
Fe2Pb(SeO3)4 crystallizes in the triclinic P1 space group. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in an octahedral geometry to one O(1), one O(2), one O(3), one O(4), one O(7), and one O(8) atom. The Fe(1)-O(1) bond length is 2.02 Å. The Fe(1)-O(2) bond length is 2.01 Å. The Fe(1)-O(3) bond length is 2.00 Å. The Fe(1)-O(4) bond length is 2.04 Å. The Fe(1)-O(7) bond length is 2.04 Å. The Fe(1)-O(8) bond length is 2.07 Å. In the second Fe site, Fe(2) is bonded in an octahedral geometry to one O(10), one O(11), one O(12), one O(5), one O(6), and one O(9) atom. The Fe(2)-O(10) bond length is 1.99 Å. The Fe(2)-O(11) bond length is 2.04 Å. The Fe(2)-O(12) bond length is 2.08 Å. The Fe(2)-O(5) bond length is 2.14 Å. The Fe(2)-O(6) bond length is 2.11 Å. The Fe(2)-O(9) bond length is 1.99 Å. Pb(1) is bonded in a 6-coordinate geometry to one O(12), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. The Pb(1)-O(12) bond length is 2.76 Å. The Pb(1)-O(4) bond length is 2.79 Å. The Pb(1)-O(5) bond length is 2.58 Å. The Pb(1)-O(6) bond length is 2.70 Å. The Pb(1)-O(7) bond length is 2.56 Å. The Pb(1)-O(8) bond length is 2.58 Å. There are four inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(1), one O(5), and one O(9) atom. The Se(1)-O(1) bond length is 1.71 Å. The Se(1)-O(5) bond length is 1.77 Å. The Se(1)-O(9) bond length is 1.73 Å. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(10), one O(2), and one O(6) atom. The Se(2)-O(10) bond length is 1.73 Å. The Se(2)-O(2) bond length is 1.72 Å. The Se(2)-O(6) bond length is 1.76 Å. In the third Se site, Se(3) is bonded in a distorted trigonal non-coplanar geometry to one O(11), one O(3), and one O(7) atom. The Se(3)-O(11) bond length is 1.74 Å. The Se(3)-O(3) bond length is 1.72 Å. The Se(3)-O(7) bond length is 1.75 Å. In the fourth Se site, Se(4) is bonded in a distorted trigonal non-coplanar geometry to one O(12), one O(4), and one O(8) atom. The Se(4)-O(12) bond length is 1.75 Å. The Se(4)-O(4) bond length is 1.73 Å. The Se(4)-O(8) bond length is 1.74 Å. There are twelve inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Fe(1) and one Se(1) atom. In the second O site, O(2) is bonded in a bent 150 degrees geometry to one Fe(1) and one Se(2) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one Fe(1) and one Se(3) atom. In the fourth O site, O(4) is bonded in a bent 120 degrees geometry to one Fe(1), one Pb(1), and one Se(4) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Fe(2), one Pb(1), and one Se(1) atom. In the sixth O site, O(6) is bonded in a distorted trigonal planar geometry to one Fe(2), one Pb(1), and one Se(2) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Fe(1), one Pb(1), and one Se(3) atom. In the eighth O site, O(8) is bonded in a distorted trigonal planar geometry to one Fe(1), one Pb(1), and one Se(4) atom. In the ninth O site, O(9) is bonded in a bent 120 degrees geometry to one Fe(2) and one Se(1) atom. In the tenth O site, O(10) is bonded in a bent 120 degrees geometry to one Fe(2) and one Se(2) atom. In the eleventh O site, O(11) is bonded in a bent 120 degrees geometry to one Fe(2) and one Se(3) atom. In the twelfth O site, O(12) is bonded in a distorted bent 120 degrees geometry to one Fe(2), one Pb(1), and one Se(4) atom.