Ag3Si crystallizes in the hexagonal P-6m2 space group. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to six equivalent Ag(1) and six equivalent Ag(2) atoms to form AgAg12 cuboctahedra that share corners with six equivalent Ag(1)Ag12 cuboctahedra, corners with twelve equivalent Si(1)Ag6 cuboctahedra, edges with six equivalent Ag(1)Ag12 cuboctahedra, edges with twelve equivalent Ag(2)Si3Ag9 cuboctahedra, faces with two equivalent Si(1)Ag6 cuboctahedra, faces with six equivalent Ag(1)Ag12 cuboctahedra, and faces with twelve equivalent Ag(2)Si3Ag9 cuboctahedra. In the second Ag site, Ag(2) is bonded to three equivalent Ag(1), six equivalent Ag(2), and three equivalent Si(1) atoms to form AgSi3Ag9 cuboctahedra that share corners with six equivalent Si(1)Ag6 cuboctahedra, corners with eighteen equivalent Ag(2)Si3Ag9 cuboctahedra, edges with six equivalent Ag(1)Ag12 cuboctahedra, edges with six equivalent Ag(2)Si3Ag9 cuboctahedra, edges with six equivalent Si(1)Ag6 cuboctahedra, faces with six equivalent Ag(1)Ag12 cuboctahedra, and faces with eight equivalent Ag(2)Si3Ag9 cuboctahedra. Si(1) is bonded to six equivalent Ag(2) atoms to form distorted SiAg6 cuboctahedra that share corners with twelve equivalent Ag(1)Ag12 cuboctahedra, corners with twelve equivalent Ag(2)Si3Ag9 cuboctahedra, edges with six equivalent Si(1)Ag6 cuboctahedra, edges with twelve equivalent Ag(2)Si3Ag9 cuboctahedra, and faces with two equivalent Ag(1)Ag12 cuboctahedra.
Ag3Si crystallizes in the hexagonal P-6m2 space group. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to six equivalent Ag(1) and six equivalent Ag(2) atoms to form AgAg12 cuboctahedra that share corners with six equivalent Ag(1)Ag12 cuboctahedra, corners with twelve equivalent Si(1)Ag6 cuboctahedra, edges with six equivalent Ag(1)Ag12 cuboctahedra, edges with twelve equivalent Ag(2)Si3Ag9 cuboctahedra, faces with two equivalent Si(1)Ag6 cuboctahedra, faces with six equivalent Ag(1)Ag12 cuboctahedra, and faces with twelve equivalent Ag(2)Si3Ag9 cuboctahedra. All Ag(1)-Ag(1) bond lengths are 2.94 Å. All Ag(1)-Ag(2) bond lengths are 2.96 Å. In the second Ag site, Ag(2) is bonded to three equivalent Ag(1), six equivalent Ag(2), and three equivalent Si(1) atoms to form AgSi3Ag9 cuboctahedra that share corners with six equivalent Si(1)Ag6 cuboctahedra, corners with eighteen equivalent Ag(2)Si3Ag9 cuboctahedra, edges with six equivalent Ag(1)Ag12 cuboctahedra, edges with six equivalent Ag(2)Si3Ag9 cuboctahedra, edges with six equivalent Si(1)Ag6 cuboctahedra, faces with six equivalent Ag(1)Ag12 cuboctahedra, and faces with eight equivalent Ag(2)Si3Ag9 cuboctahedra. All Ag(2)-Ag(2) bond lengths are 2.94 Å. All Ag(2)-Si(1) bond lengths are 2.77 Å. Si(1) is bonded to six equivalent Ag(2) atoms to form distorted SiAg6 cuboctahedra that share corners with twelve equivalent Ag(1)Ag12 cuboctahedra, corners with twelve equivalent Ag(2)Si3Ag9 cuboctahedra, edges with six equivalent Si(1)Ag6 cuboctahedra, edges with twelve equivalent Ag(2)Si3Ag9 cuboctahedra, and faces with two equivalent Ag(1)Ag12 cuboctahedra.