Li2CuCAsO7 crystallizes in the monoclinic P2_1/m space group. Li(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(5) atom. Cu(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. As(1) is bonded in a tetrahedral geometry to one O(5), one O(6), and two equivalent O(4) atoms. There are six inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Li(1) and one C(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Li(1), one Cu(1), and one C(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Li(1), one Cu(1), and one C(1) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Li(1), one Cu(1), and one As(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Li(1), one Cu(1), and one As(1) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Cu(1) and one As(1) atom.
Li2CuCAsO7 crystallizes in the monoclinic P2_1/m space group. Li(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(5) atom. The Li(1)-O(1) bond length is 2.01 Å. The Li(1)-O(2) bond length is 2.40 Å. The Li(1)-O(3) bond length is 2.27 Å. The Li(1)-O(4) bond length is 2.21 Å. The Li(1)-O(5) bond length is 2.04 Å. Cu(1) is bonded in a 6-coordinate geometry to one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms. The Cu(1)-O(2) bond length is 1.91 Å. The Cu(1)-O(3) bond length is 2.55 Å. The Cu(1)-O(5) bond length is 2.30 Å. The Cu(1)-O(6) bond length is 1.91 Å. Both Cu(1)-O(4) bond lengths are 1.89 Å. C(1) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. The C(1)-O(1) bond length is 1.28 Å. The C(1)-O(2) bond length is 1.34 Å. The C(1)-O(3) bond length is 1.27 Å. As(1) is bonded in a tetrahedral geometry to one O(5), one O(6), and two equivalent O(4) atoms. The As(1)-O(5) bond length is 1.69 Å. The As(1)-O(6) bond length is 1.76 Å. Both As(1)-O(4) bond lengths are 1.73 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Li(1) and one C(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Li(1), one Cu(1), and one C(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to two equivalent Li(1), one Cu(1), and one C(1) atom. In the fourth O site, O(4) is bonded in a distorted T-shaped geometry to one Li(1), one Cu(1), and one As(1) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to two equivalent Li(1), one Cu(1), and one As(1) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Cu(1) and one As(1) atom.