LiSbP2O7 crystallizes in the monoclinic P2_1/c space group. Li(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(5), and two equivalent O(7) atoms. Sb(1) is bonded to one O(1), one O(2), one O(3), one O(5), and one O(6) atom to form SbO5 square pyramids that share corners with two equivalent P(2)O4 tetrahedra and corners with three equivalent P(1)O4 tetrahedra. 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(4) atom to form PO4 tetrahedra that share corners with three equivalent Sb(1)O5 square pyramids and  a cornercorner with one P(2)O4 tetrahedra. In the second P site, P(2) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share corners with two equivalent Sb(1)O5 square pyramids and  a cornercorner with one P(1)O4 tetrahedra. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Li(1), one Sb(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Sb(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 Sb(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Li(1), one Sb(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Sb(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to two equivalent Li(1) and one P(2) atom.
LiSbP2O7 crystallizes in the monoclinic P2_1/c space group. Li(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), one O(5), and two equivalent O(7) atoms. The Li(1)-O(1) bond length is 2.18 Å. The Li(1)-O(3) bond length is 2.56 Å. The Li(1)-O(5) bond length is 2.17 Å. There is one shorter (1.96 Å) and one longer (2.05 Å) Li(1)-O(7) bond length. Sb(1) is bonded to one O(1), one O(2), one O(3), one O(5), and one O(6) atom to form SbO5 square pyramids that share corners with two equivalent P(2)O4 tetrahedra and corners with three equivalent P(1)O4 tetrahedra. The Sb(1)-O(1) bond length is 2.36 Å. The Sb(1)-O(2) bond length is 2.11 Å. The Sb(1)-O(3) bond length is 2.20 Å. The Sb(1)-O(5) bond length is 2.20 Å. The Sb(1)-O(6) bond length is 2.35 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(4) atom to form PO4 tetrahedra that share corners with three equivalent Sb(1)O5 square pyramids and  a cornercorner with one P(2)O4 tetrahedra. The P(1)-O(1) bond length is 1.54 Å. The P(1)-O(2) bond length is 1.57 Å. The P(1)-O(3) bond length is 1.54 Å. The P(1)-O(4) bond length is 1.59 Å. In the second P site, P(2) is bonded to one O(4), one O(5), one O(6), and one O(7) atom to form PO4 tetrahedra that share corners with two equivalent Sb(1)O5 square pyramids and  a cornercorner with one P(1)O4 tetrahedra. The P(2)-O(4) bond length is 1.64 Å. The P(2)-O(5) bond length is 1.56 Å. The P(2)-O(6) bond length is 1.53 Å. The P(2)-O(7) bond length is 1.50 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one Li(1), one Sb(1), and one P(1) atom. In the second O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Sb(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 Sb(1), and one P(1) atom. In the fourth O site, O(4) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to one Li(1), one Sb(1), and one P(2) atom. In the sixth O site, O(6) is bonded in a distorted bent 150 degrees geometry to one Sb(1) and one P(2) atom. In the seventh O site, O(7) is bonded in a distorted T-shaped geometry to two equivalent Li(1) and one P(2) atom.