Au3SnP7 crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded in a 4-coordinate geometry to one Sn(1), one P(2), one P(3), and one P(4) atom. In the second Au site, Au(2) is bonded in a 4-coordinate geometry to one Sn(1), one P(1), and two equivalent P(3) atoms. Sn(1) is bonded to one Au(2), two equivalent Au(1), one P(1), and two equivalent P(2) atoms to form SnP3Au3 octahedra that share  a cornercorner with one P(1)SnP2Au tetrahedra, corners with two equivalent P(2)SnP2Au tetrahedra, corners with six equivalent P(3)P2Au2 tetrahedra, and corners with six equivalent P(4)P3Au tetrahedra. There are four inequivalent P sites. In the first P site, P(1) is bonded to one Au(2), one Sn(1), and two equivalent P(4) atoms to form distorted PSnP2Au tetrahedra that share  a cornercorner with one Sn(1)P3Au3 octahedra, corners with four equivalent P(3)P2Au2 tetrahedra, and corners with four equivalent P(2)SnP2Au tetrahedra. The corner-sharing octahedral tilt angles are 29°. In the second P site, P(2) is bonded to one Au(1), one Sn(1), one P(3), and one P(4) atom to form PSnP2Au tetrahedra that share  a cornercorner with one Sn(1)P3Au3 octahedra,  a cornercorner with one P(2)SnP2Au tetrahedra, corners with two equivalent P(3)P2Au2 tetrahedra, corners with two equivalent P(4)P3Au tetrahedra, and corners with two equivalent P(1)SnP2Au tetrahedra. The corner-sharing octahedral tilt angles are 37°. In the third P site, P(3) is bonded to one Au(1), one Au(2), one P(2), and one P(4) atom to form PP2Au2 tetrahedra that share corners with three equivalent Sn(1)P3Au3 octahedra,  a cornercorner with one P(3)P2Au2 tetrahedra, corners with two equivalent P(4)P3Au tetrahedra, corners with two equivalent P(1)SnP2Au tetrahedra, and corners with two equivalent P(2)SnP2Au tetrahedra. The corner-sharing octahedral tilt angles range from 72-87°. In the fourth P site, P(4) is bonded to one Au(1), one P(1), one P(2), and one P(3) atom to form PP3Au tetrahedra that share corners with three equivalent Sn(1)P3Au3 octahedra,  a cornercorner with one P(4)P3Au tetrahedra, corners with two equivalent P(3)P2Au2 tetrahedra, and corners with two equivalent P(2)SnP2Au tetrahedra. The corner-sharing octahedral tilt angles range from 75-87°.
Au3SnP7 crystallizes in the monoclinic P2_1/m space group. There are two inequivalent Au sites. In the first Au site, Au(1) is bonded in a 4-coordinate geometry to one Sn(1), one P(2), one P(3), and one P(4) atom. The Au(1)-Sn(1) bond length is 2.83 Å. The Au(1)-P(2) bond length is 2.43 Å. The Au(1)-P(3) bond length is 2.42 Å. The Au(1)-P(4) bond length is 2.50 Å. In the second Au site, Au(2) is bonded in a 4-coordinate geometry to one Sn(1), one P(1), and two equivalent P(3) atoms. The Au(2)-Sn(1) bond length is 2.75 Å. The Au(2)-P(1) bond length is 2.46 Å. Both Au(2)-P(3) bond lengths are 2.47 Å. Sn(1) is bonded to one Au(2), two equivalent Au(1), one P(1), and two equivalent P(2) atoms to form SnP3Au3 octahedra that share  a cornercorner with one P(1)SnP2Au tetrahedra, corners with two equivalent P(2)SnP2Au tetrahedra, corners with six equivalent P(3)P2Au2 tetrahedra, and corners with six equivalent P(4)P3Au tetrahedra. The Sn(1)-P(1) bond length is 2.65 Å. Both Sn(1)-P(2) bond lengths are 2.64 Å. There are four inequivalent P sites. In the first P site, P(1) is bonded to one Au(2), one Sn(1), and two equivalent P(4) atoms to form distorted PSnP2Au tetrahedra that share  a cornercorner with one Sn(1)P3Au3 octahedra, corners with four equivalent P(3)P2Au2 tetrahedra, and corners with four equivalent P(2)SnP2Au tetrahedra. The corner-sharing octahedral tilt angles are 29°. Both P(1)-P(4) bond lengths are 2.20 Å. In the second P site, P(2) is bonded to one Au(1), one Sn(1), one P(3), and one P(4) atom to form PSnP2Au tetrahedra that share  a cornercorner with one Sn(1)P3Au3 octahedra,  a cornercorner with one P(2)SnP2Au tetrahedra, corners with two equivalent P(3)P2Au2 tetrahedra, corners with two equivalent P(4)P3Au tetrahedra, and corners with two equivalent P(1)SnP2Au tetrahedra. The corner-sharing octahedral tilt angles are 37°. The P(2)-P(3) bond length is 2.19 Å. The P(2)-P(4) bond length is 2.19 Å. In the third P site, P(3) is bonded to one Au(1), one Au(2), one P(2), and one P(4) atom to form PP2Au2 tetrahedra that share corners with three equivalent Sn(1)P3Au3 octahedra,  a cornercorner with one P(3)P2Au2 tetrahedra, corners with two equivalent P(4)P3Au tetrahedra, corners with two equivalent P(1)SnP2Au tetrahedra, and corners with two equivalent P(2)SnP2Au tetrahedra. The corner-sharing octahedral tilt angles range from 72-87°. The P(3)-P(4) bond length is 2.21 Å. In the fourth P site, P(4) is bonded to one Au(1), one P(1), one P(2), and one P(3) atom to form PP3Au tetrahedra that share corners with three equivalent Sn(1)P3Au3 octahedra,  a cornercorner with one P(4)P3Au tetrahedra, corners with two equivalent P(3)P2Au2 tetrahedra, and corners with two equivalent P(2)SnP2Au tetrahedra. The corner-sharing octahedral tilt angles range from 75-87°.