Ni1Ag3 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. Ni(1) is bonded to four equivalent Ag(2) and eight equivalent Ag(1) atoms to form NiAg12 cuboctahedra that share corners with four equivalent Ni(1)Ag12 cuboctahedra, corners with eight equivalent Ag(2)Ni4Ag8 cuboctahedra, edges with eight equivalent Ni(1)Ag12 cuboctahedra, edges with sixteen equivalent Ag(1)Ni4Ag8 cuboctahedra, faces with four equivalent Ni(1)Ag12 cuboctahedra, faces with six equivalent Ag(2)Ni4Ag8 cuboctahedra, and faces with eight equivalent Ag(1)Ni4Ag8 cuboctahedra. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to four equivalent Ni(1), four equivalent Ag(1), and four equivalent Ag(2) atoms to form AgNi4Ag8 cuboctahedra that share corners with twelve equivalent Ag(1)Ni4Ag8 cuboctahedra, edges with eight equivalent Ni(1)Ag12 cuboctahedra, edges with eight equivalent Ag(1)Ni4Ag8 cuboctahedra, edges with eight equivalent Ag(2)Ni4Ag8 cuboctahedra, faces with four equivalent Ni(1)Ag12 cuboctahedra, faces with four equivalent Ag(2)Ni4Ag8 cuboctahedra, and faces with ten equivalent Ag(1)Ni4Ag8 cuboctahedra. In the second Ag site, Ag(2) is bonded to four equivalent Ni(1) and eight equivalent Ag(1) atoms to form AgNi4Ag8 cuboctahedra that share corners with four equivalent Ag(2)Ni4Ag8 cuboctahedra, corners with eight equivalent Ni(1)Ag12 cuboctahedra, edges with eight equivalent Ag(2)Ni4Ag8 cuboctahedra, edges with sixteen equivalent Ag(1)Ni4Ag8 cuboctahedra, faces with four equivalent Ag(2)Ni4Ag8 cuboctahedra, faces with six equivalent Ni(1)Ag12 cuboctahedra, and faces with eight equivalent Ag(1)Ni4Ag8 cuboctahedra.
Ni1Ag3 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. Ni(1) is bonded to four equivalent Ag(2) and eight equivalent Ag(1) atoms to form NiAg12 cuboctahedra that share corners with four equivalent Ni(1)Ag12 cuboctahedra, corners with eight equivalent Ag(2)Ni4Ag8 cuboctahedra, edges with eight equivalent Ni(1)Ag12 cuboctahedra, edges with sixteen equivalent Ag(1)Ni4Ag8 cuboctahedra, faces with four equivalent Ni(1)Ag12 cuboctahedra, faces with six equivalent Ag(2)Ni4Ag8 cuboctahedra, and faces with eight equivalent Ag(1)Ni4Ag8 cuboctahedra. All Ni(1)-Ag(2) bond lengths are 2.84 Å. All Ni(1)-Ag(1) bond lengths are 2.83 Å. There are two inequivalent Ag sites. In the first Ag site, Ag(1) is bonded to four equivalent Ni(1), four equivalent Ag(1), and four equivalent Ag(2) atoms to form AgNi4Ag8 cuboctahedra that share corners with twelve equivalent Ag(1)Ni4Ag8 cuboctahedra, edges with eight equivalent Ni(1)Ag12 cuboctahedra, edges with eight equivalent Ag(1)Ni4Ag8 cuboctahedra, edges with eight equivalent Ag(2)Ni4Ag8 cuboctahedra, faces with four equivalent Ni(1)Ag12 cuboctahedra, faces with four equivalent Ag(2)Ni4Ag8 cuboctahedra, and faces with ten equivalent Ag(1)Ni4Ag8 cuboctahedra. All Ag(1)-Ag(1) bond lengths are 2.84 Å. All Ag(1)-Ag(2) bond lengths are 2.83 Å. In the second Ag site, Ag(2) is bonded to four equivalent Ni(1) and eight equivalent Ag(1) atoms to form AgNi4Ag8 cuboctahedra that share corners with four equivalent Ag(2)Ni4Ag8 cuboctahedra, corners with eight equivalent Ni(1)Ag12 cuboctahedra, edges with eight equivalent Ag(2)Ni4Ag8 cuboctahedra, edges with sixteen equivalent Ag(1)Ni4Ag8 cuboctahedra, faces with four equivalent Ag(2)Ni4Ag8 cuboctahedra, faces with six equivalent Ni(1)Ag12 cuboctahedra, and faces with eight equivalent Ag(1)Ni4Ag8 cuboctahedra.