Ag2Cu(PO3)4 crystallizes in the monoclinic C2/c space group. Ag(1) is bonded to one O(3), one O(6), one O(7), and two equivalent O(1) atoms to form distorted AgO5 trigonal bipyramids that share corners with two equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra,  an edgeedge with one Ag(1)O5 trigonal bipyramid, and  a faceface with one Cu(1)O6 octahedra. Cu(1) is bonded to two equivalent O(3), two equivalent O(6), and two equivalent O(7) atoms to form distorted CuO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra, corners with four equivalent P(1)O4 tetrahedra, and faces with two equivalent Ag(1)O5 trigonal bipyramids. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(2), one O(3), one O(4), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Cu(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent Ag(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 45-58°. In the second P site, P(2) is bonded to one O(1), one O(4), one O(5), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Cu(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with three equivalent Ag(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 50°. There are seven inequivalent O sites. In the first O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent P(1) atoms. In the second O site, O(3) is bonded in a 2-coordinate geometry to one Ag(1), one Cu(1), and one P(1) atom. In the third O site, O(4) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the fourth O site, O(5) is bonded in a bent 120 degrees geometry to two equivalent P(2) atoms. In the fifth O site, O(6) is bonded in a distorted single-bond geometry to one Ag(1), one Cu(1), and one P(1) atom. In the sixth O site, O(7) is bonded in a 3-coordinate geometry to one Ag(1), one Cu(1), and one P(2) atom. In the seventh O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Ag(1) and one P(2) atom.
Ag2Cu(PO3)4 crystallizes in the monoclinic C2/c space group. Ag(1) is bonded to one O(3), one O(6), one O(7), and two equivalent O(1) atoms to form distorted AgO5 trigonal bipyramids that share corners with two equivalent P(1)O4 tetrahedra, corners with three equivalent P(2)O4 tetrahedra,  an edgeedge with one Ag(1)O5 trigonal bipyramid, and  a faceface with one Cu(1)O6 octahedra. The Ag(1)-O(3) bond length is 2.68 Å. The Ag(1)-O(6) bond length is 2.44 Å. The Ag(1)-O(7) bond length is 2.43 Å. There is one shorter (2.32 Å) and one longer (2.44 Å) Ag(1)-O(1) bond length. Cu(1) is bonded to two equivalent O(3), two equivalent O(6), and two equivalent O(7) atoms to form distorted CuO6 octahedra that share corners with two equivalent P(2)O4 tetrahedra, corners with four equivalent P(1)O4 tetrahedra, and faces with two equivalent Ag(1)O5 trigonal bipyramids. Both Cu(1)-O(3) bond lengths are 1.97 Å. Both Cu(1)-O(6) bond lengths are 2.60 Å. Both Cu(1)-O(7) bond lengths are 1.99 Å. There are two inequivalent P sites. In the first P site, P(1) is bonded to one O(2), one O(3), one O(4), and one O(6) atom to form PO4 tetrahedra that share corners with two equivalent Cu(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with two equivalent Ag(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 45-58°. The P(1)-O(2) bond length is 1.62 Å. The P(1)-O(3) bond length is 1.51 Å. The P(1)-O(4) bond length is 1.63 Å. The P(1)-O(6) bond length is 1.49 Å. In the second P site, P(2) is bonded to one O(1), one O(4), one O(5), and one O(7) atom to form PO4 tetrahedra that share  a cornercorner with one Cu(1)O6 octahedra,  a cornercorner with one P(1)O4 tetrahedra,  a cornercorner with one P(2)O4 tetrahedra, and corners with three equivalent Ag(1)O5 trigonal bipyramids. The corner-sharing octahedral tilt angles are 50°. The P(2)-O(1) bond length is 1.50 Å. The P(2)-O(4) bond length is 1.60 Å. The P(2)-O(5) bond length is 1.62 Å. The P(2)-O(7) bond length is 1.52 Å. There are seven inequivalent O sites. In the first O site, O(2) is bonded in a distorted bent 120 degrees geometry to two equivalent P(1) atoms. In the second O site, O(3) is bonded in a 2-coordinate geometry to one Ag(1), one Cu(1), and one P(1) atom. In the third O site, O(4) is bonded in a bent 150 degrees geometry to one P(1) and one P(2) atom. In the fourth O site, O(5) is bonded in a bent 120 degrees geometry to two equivalent P(2) atoms. In the fifth O site, O(6) is bonded in a distorted single-bond geometry to one Ag(1), one Cu(1), and one P(1) atom. In the sixth O site, O(7) is bonded in a 3-coordinate geometry to one Ag(1), one Cu(1), and one P(2) atom. In the seventh O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Ag(1) and one P(2) atom.