LiCrP2O7 crystallizes in the monoclinic C2/c space group. Li(1) is bonded to one O(1), one O(3), one O(6), and one O(7) atom to form distorted LiO4 trigonal pyramids that share corners with two equivalent P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. Cr(1) is bonded in a rectangular see-saw-like geometry to one O(3), one O(4), one O(5), and one O(7) atom. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and corners with two equivalent Li(1)O4 trigonal pyramids. In the second P site, P(2) is bonded to one O(2), one O(4), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with two equivalent Li(1)O4 trigonal pyramids. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Li(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Li(1), one Cr(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Cr(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Cr(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Li(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Li(1), one Cr(1), and one P(2) atom.
LiCrP2O7 crystallizes in the monoclinic C2/c space group. Li(1) is bonded to one O(1), one O(3), one O(6), and one O(7) atom to form distorted LiO4 trigonal pyramids that share corners with two equivalent P(1)O4 tetrahedra and corners with two equivalent P(2)O4 tetrahedra. The Li(1)-O(1) bond length is 1.91 Å. The Li(1)-O(3) bond length is 2.17 Å. The Li(1)-O(6) bond length is 1.91 Å. The Li(1)-O(7) bond length is 2.09 Å. Cr(1) is bonded in a rectangular see-saw-like geometry to one O(3), one O(4), one O(5), and one O(7) atom. The Cr(1)-O(3) bond length is 1.95 Å. The Cr(1)-O(4) bond length is 1.93 Å. The Cr(1)-O(5) bond length is 1.91 Å. The Cr(1)-O(7) bond length is 1.95 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(1), one O(2), one O(3), and one O(5) atom to form PO4 tetrahedra that share  a cornercorner with one P(2)O4 tetrahedra and corners with two equivalent Li(1)O4 trigonal pyramids. The P(1)-O(1) bond length is 1.47 Å. The P(1)-O(2) bond length is 1.65 Å. The P(1)-O(3) bond length is 1.58 Å. The P(1)-O(5) bond length is 1.55 Å. In the second P site, P(2) is bonded to one O(2), one O(4), one O(6), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one P(1)O4 tetrahedra and corners with two equivalent Li(1)O4 trigonal pyramids. The P(2)-O(2) bond length is 1.65 Å. The P(2)-O(4) bond length is 1.54 Å. The P(2)-O(6) bond length is 1.47 Å. The P(2)-O(7) bond length is 1.59 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a bent 150 degrees geometry to one Li(1) and one P(1) atom. In the second O site, O(2) is bonded in a bent 120 degrees geometry to one P(1) and one P(2) atom. In the third O site, O(3) is bonded in a trigonal planar geometry to one Li(1), one Cr(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Cr(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 150 degrees geometry to one Cr(1) and one P(1) atom. In the sixth O site, O(6) is bonded in a bent 150 degrees geometry to one Li(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a trigonal planar geometry to one Li(1), one Cr(1), and one P(2) atom.