AgSi3 is alpha bismuth trifluoride structured and crystallizes in the tetragonal I4/mmm space group. Ag(1) is bonded to four equivalent Si(2) and eight equivalent Si(1) atoms to form AgSi12 cuboctahedra that share corners with four equivalent Ag(1)Si12 cuboctahedra, corners with eight equivalent Si(2)Si8Ag4 cuboctahedra, edges with eight equivalent Ag(1)Si12 cuboctahedra, faces with four equivalent Ag(1)Si12 cuboctahedra, and faces with six equivalent Si(2)Si8Ag4 cuboctahedra. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to four equivalent Ag(1) and four equivalent Si(2) atoms. In the second Si site, Si(2) is bonded to four equivalent Ag(1) and eight equivalent Si(1) atoms to form SiSi8Ag4 cuboctahedra that share corners with four equivalent Si(2)Si8Ag4 cuboctahedra, corners with eight equivalent Ag(1)Si12 cuboctahedra, edges with eight equivalent Si(2)Si8Ag4 cuboctahedra, faces with four equivalent Si(2)Si8Ag4 cuboctahedra, and faces with six equivalent Ag(1)Si12 cuboctahedra.
AgSi3 is alpha bismuth trifluoride structured and crystallizes in the tetragonal I4/mmm space group. Ag(1) is bonded to four equivalent Si(2) and eight equivalent Si(1) atoms to form AgSi12 cuboctahedra that share corners with four equivalent Ag(1)Si12 cuboctahedra, corners with eight equivalent Si(2)Si8Ag4 cuboctahedra, edges with eight equivalent Ag(1)Si12 cuboctahedra, faces with four equivalent Ag(1)Si12 cuboctahedra, and faces with six equivalent Si(2)Si8Ag4 cuboctahedra. All Ag(1)-Si(2) bond lengths are 2.94 Å. All Ag(1)-Si(1) bond lengths are 2.78 Å. There are two inequivalent Si sites. In the first Si site, Si(1) is bonded in a 8-coordinate geometry to four equivalent Ag(1) and four equivalent Si(2) atoms. All Si(1)-Si(2) bond lengths are 2.78 Å. In the second Si site, Si(2) is bonded to four equivalent Ag(1) and eight equivalent Si(1) atoms to form SiSi8Ag4 cuboctahedra that share corners with four equivalent Si(2)Si8Ag4 cuboctahedra, corners with eight equivalent Ag(1)Si12 cuboctahedra, edges with eight equivalent Si(2)Si8Ag4 cuboctahedra, faces with four equivalent Si(2)Si8Ag4 cuboctahedra, and faces with six equivalent Ag(1)Si12 cuboctahedra.