Li3Eu2(BO3)3 crystallizes in the monoclinic P2_1 space group. There are three inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to one O(1), one O(3), one O(6), and one O(9) atom. In the second Li site, Li(2) is bonded in a distorted T-shaped geometry to one O(1), one O(5), and one O(9) atom. In the third Li site, Li(3) is bonded in a trigonal planar geometry to one O(5), one O(7), and one O(9) atom. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(5), one O(7), and one O(8) atom. In the second Eu site, Eu(2) is bonded in a distorted trigonal bipyramidal geometry to one O(1), one O(3), one O(6), one O(7), and one O(8) atom. There are three inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. In the third B site, B(3) is bonded in a trigonal planar geometry to one O(2), one O(4), and one O(9) atom. There are nine inequivalent O sites. In the first O site, O(9) is bonded to one Li(1), one Li(2), one Li(3), and one B(3) atom to form distorted corner-sharing OLi3B tetrahedra. In the second O site, O(1) is bonded in a 4-coordinate geometry to one Li(1), one Li(2), one Eu(2), and one B(1) atom. In the third O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Eu(1), one B(1), and one B(3) atom. In the fourth O site, O(3) is bonded in a 4-coordinate geometry to one Li(1), one Eu(1), one Eu(2), and one B(1) atom. In the fifth O site, O(4) is bonded in a bent 120 degrees geometry to one B(2) and one B(3) atom. In the sixth O site, O(5) is bonded to one Li(2), one Li(3), one Eu(1), and one B(2) atom to form distorted corner-sharing OLi2EuB tetrahedra. In the seventh O site, O(6) is bonded in a distorted trigonal planar geometry to one Li(1), one Eu(2), and one B(2) atom. In the eighth O site, O(7) is bonded in a trigonal planar geometry to one Li(3), one Eu(1), and one Eu(2) atom. In the ninth O site, O(8) is bonded in a bent 150 degrees geometry to one Eu(1) and one Eu(2) atom.
Li3Eu2(BO3)3 crystallizes in the monoclinic P2_1 space group. There are three inequivalent Li sites. In the first Li site, Li(1) is bonded in a 4-coordinate geometry to one O(1), one O(3), one O(6), and one O(9) atom. The Li(1)-O(1) bond length is 2.25 Å. The Li(1)-O(3) bond length is 2.04 Å. The Li(1)-O(6) bond length is 1.92 Å. The Li(1)-O(9) bond length is 1.96 Å. In the second Li site, Li(2) is bonded in a distorted T-shaped geometry to one O(1), one O(5), and one O(9) atom. The Li(2)-O(1) bond length is 1.99 Å. The Li(2)-O(5) bond length is 2.05 Å. The Li(2)-O(9) bond length is 1.97 Å. In the third Li site, Li(3) is bonded in a trigonal planar geometry to one O(5), one O(7), and one O(9) atom. The Li(3)-O(5) bond length is 2.00 Å. The Li(3)-O(7) bond length is 1.91 Å. The Li(3)-O(9) bond length is 1.91 Å. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 5-coordinate geometry to one O(2), one O(3), one O(5), one O(7), and one O(8) atom. The Eu(1)-O(2) bond length is 2.56 Å. The Eu(1)-O(3) bond length is 2.59 Å. The Eu(1)-O(5) bond length is 2.39 Å. The Eu(1)-O(7) bond length is 2.15 Å. The Eu(1)-O(8) bond length is 2.14 Å. In the second Eu site, Eu(2) is bonded in a distorted trigonal bipyramidal geometry to one O(1), one O(3), one O(6), one O(7), and one O(8) atom. The Eu(2)-O(1) bond length is 2.41 Å. The Eu(2)-O(3) bond length is 2.68 Å. The Eu(2)-O(6) bond length is 2.35 Å. The Eu(2)-O(7) bond length is 2.23 Å. The Eu(2)-O(8) bond length is 2.14 Å. There are three inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. The B(1)-O(1) bond length is 1.36 Å. The B(1)-O(2) bond length is 1.45 Å. The B(1)-O(3) bond length is 1.37 Å. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(4), one O(5), and one O(6) atom. The B(2)-O(4) bond length is 1.43 Å. The B(2)-O(5) bond length is 1.38 Å. The B(2)-O(6) bond length is 1.36 Å. In the third B site, B(3) is bonded in a trigonal planar geometry to one O(2), one O(4), and one O(9) atom. The B(3)-O(2) bond length is 1.42 Å. The B(3)-O(4) bond length is 1.40 Å. The B(3)-O(9) bond length is 1.33 Å. There are nine inequivalent O sites. In the first O site, O(9) is bonded to one Li(1), one Li(2), one Li(3), and one B(3) atom to form distorted corner-sharing OLi3B tetrahedra. In the second O site, O(1) is bonded in a 4-coordinate geometry to one Li(1), one Li(2), one Eu(2), and one B(1) atom. In the third O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Eu(1), one B(1), and one B(3) atom. In the fourth O site, O(3) is bonded in a 4-coordinate geometry to one Li(1), one Eu(1), one Eu(2), and one B(1) atom. In the fifth O site, O(4) is bonded in a bent 120 degrees geometry to one B(2) and one B(3) atom. In the sixth O site, O(5) is bonded to one Li(2), one Li(3), one Eu(1), and one B(2) atom to form distorted corner-sharing OLi2EuB tetrahedra. In the seventh O site, O(6) is bonded in a distorted trigonal planar geometry to one Li(1), one Eu(2), and one B(2) atom. In the eighth O site, O(7) is bonded in a trigonal planar geometry to one Li(3), one Eu(1), and one Eu(2) atom. In the ninth O site, O(8) is bonded in a bent 150 degrees geometry to one Eu(1) and one Eu(2) atom.