LiEu2Cr2O8 crystallizes in the triclinic P1 space group. Li(1) is bonded to one O(1), one O(2), one O(7), and one O(8) atom to form distorted LiO4 tetrahedra that share corners with two equivalent Cr(2)O4 tetrahedra and  an edgeedge with one Cr(1)O4 tetrahedra. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. In the second Eu site, Eu(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(2), one O(3), one O(6), and one O(7) atom to form CrO4 tetrahedra that share  an edgeedge with one Li(1)O4 tetrahedra. In the second Cr site, Cr(2) is bonded to one O(1), one O(4), one O(5), and one O(8) atom to form CrO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Li(1), one Eu(1), one Eu(2), and one Cr(2) atom. In the second O site, O(2) is bonded in a distorted see-saw-like geometry to one Li(1), one Eu(1), one Eu(2), and one Cr(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Eu(1), one Eu(2), and one Cr(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Eu(1), one Eu(2), and one Cr(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Eu(1), one Eu(2), and one Cr(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Eu(1), one Eu(2), and one Cr(1) atom. In the seventh O site, O(7) is bonded in a distorted see-saw-like geometry to one Li(1), one Eu(1), one Eu(2), and one Cr(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Li(1), one Eu(1), one Eu(2), and one Cr(2) atom.
LiEu2Cr2O8 crystallizes in the triclinic P1 space group. Li(1) is bonded to one O(1), one O(2), one O(7), and one O(8) atom to form distorted LiO4 tetrahedra that share corners with two equivalent Cr(2)O4 tetrahedra and  an edgeedge with one Cr(1)O4 tetrahedra. The Li(1)-O(1) bond length is 1.98 Å. The Li(1)-O(2) bond length is 1.99 Å. The Li(1)-O(7) bond length is 1.99 Å. The Li(1)-O(8) bond length is 1.98 Å. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. The Eu(1)-O(1) bond length is 2.62 Å. The Eu(1)-O(2) bond length is 2.49 Å. The Eu(1)-O(3) bond length is 2.46 Å. The Eu(1)-O(4) bond length is 2.47 Å. The Eu(1)-O(5) bond length is 2.47 Å. The Eu(1)-O(6) bond length is 2.46 Å. The Eu(1)-O(7) bond length is 2.49 Å. The Eu(1)-O(8) bond length is 2.62 Å. In the second Eu site, Eu(2) is bonded in a 8-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(5), one O(6), one O(7), and one O(8) atom. The Eu(2)-O(1) bond length is 2.55 Å. The Eu(2)-O(2) bond length is 2.51 Å. The Eu(2)-O(3) bond length is 2.61 Å. The Eu(2)-O(4) bond length is 2.42 Å. The Eu(2)-O(5) bond length is 2.42 Å. The Eu(2)-O(6) bond length is 2.61 Å. The Eu(2)-O(7) bond length is 2.51 Å. The Eu(2)-O(8) bond length is 2.55 Å. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(2), one O(3), one O(6), and one O(7) atom to form CrO4 tetrahedra that share  an edgeedge with one Li(1)O4 tetrahedra. The Cr(1)-O(2) bond length is 1.77 Å. The Cr(1)-O(3) bond length is 1.70 Å. The Cr(1)-O(6) bond length is 1.70 Å. The Cr(1)-O(7) bond length is 1.77 Å. In the second Cr site, Cr(2) is bonded to one O(1), one O(4), one O(5), and one O(8) atom to form CrO4 tetrahedra that share corners with two equivalent Li(1)O4 tetrahedra. The Cr(2)-O(1) bond length is 1.74 Å. The Cr(2)-O(4) bond length is 1.72 Å. The Cr(2)-O(5) bond length is 1.72 Å. The Cr(2)-O(8) bond length is 1.74 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Li(1), one Eu(1), one Eu(2), and one Cr(2) atom. In the second O site, O(2) is bonded in a distorted see-saw-like geometry to one Li(1), one Eu(1), one Eu(2), and one Cr(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Eu(1), one Eu(2), and one Cr(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Eu(1), one Eu(2), and one Cr(2) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Eu(1), one Eu(2), and one Cr(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Eu(1), one Eu(2), and one Cr(1) atom. In the seventh O site, O(7) is bonded in a distorted see-saw-like geometry to one Li(1), one Eu(1), one Eu(2), and one Cr(1) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Li(1), one Eu(1), one Eu(2), and one Cr(2) atom.