Li2WP2O8 crystallizes in the monoclinic P2_1/c space group. Li(1) is bonded to one O(1), one O(3), one O(4), and two equivalent O(2) atoms to form distorted LiO5 trigonal bipyramids that share  a cornercorner with one W(1)O6 octahedra, corners with three equivalent P(1)O4 tetrahedra,  an edgeedge with one W(1)O6 octahedra,  an edgeedge with one P(1)O4 tetrahedra, and  an edgeedge with one Li(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 55°. W(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form WO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra, corners with two equivalent Li(1)O5 trigonal bipyramids, and edges with two equivalent Li(1)O5 trigonal bipyramids. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with three equivalent W(1)O6 octahedra, corners with three equivalent Li(1)O5 trigonal bipyramids, and  an edgeedge with one Li(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 39-51°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Li(1), one W(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to two equivalent Li(1) and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Li(1), one W(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one W(1), and one P(1) atom.
Li2WP2O8 crystallizes in the monoclinic P2_1/c space group. Li(1) is bonded to one O(1), one O(3), one O(4), and two equivalent O(2) atoms to form distorted LiO5 trigonal bipyramids that share  a cornercorner with one W(1)O6 octahedra, corners with three equivalent P(1)O4 tetrahedra,  an edgeedge with one W(1)O6 octahedra,  an edgeedge with one P(1)O4 tetrahedra, and  an edgeedge with one Li(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles are 55°. The Li(1)-O(1) bond length is 2.08 Å. The Li(1)-O(3) bond length is 2.08 Å. The Li(1)-O(4) bond length is 2.30 Å. There is one shorter (1.85 Å) and one longer (1.93 Å) Li(1)-O(2) bond length. W(1) is bonded to two equivalent O(1), two equivalent O(3), and two equivalent O(4) atoms to form WO6 octahedra that share corners with six equivalent P(1)O4 tetrahedra, corners with two equivalent Li(1)O5 trigonal bipyramids, and edges with two equivalent Li(1)O5 trigonal bipyramids. Both W(1)-O(1) bond lengths are 2.12 Å. Both W(1)-O(3) bond lengths are 2.07 Å. Both W(1)-O(4) bond lengths are 2.08 Å. P(1) is bonded to one O(1), one O(2), one O(3), and one O(4) atom to form PO4 tetrahedra that share corners with three equivalent W(1)O6 octahedra, corners with three equivalent Li(1)O5 trigonal bipyramids, and  an edgeedge with one Li(1)O5 trigonal bipyramid. The corner-sharing octahedral tilt angles range from 39-51°. The P(1)-O(1) bond length is 1.56 Å. The P(1)-O(2) bond length is 1.50 Å. The P(1)-O(3) bond length is 1.58 Å. The P(1)-O(4) bond length is 1.58 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted T-shaped geometry to one Li(1), one W(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to two equivalent Li(1) and one P(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Li(1), one W(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Li(1), one W(1), and one P(1) atom.