Ni3Ag1 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to four equivalent Ni(1), four equivalent Ni(2), and four equivalent Ag(1) atoms to form NiNi8Ag4 cuboctahedra that share corners with twelve equivalent Ni(1)Ni8Ag4 cuboctahedra, edges with eight equivalent Ni(1)Ni8Ag4 cuboctahedra, edges with eight equivalent Ni(2)Ni8Ag4 cuboctahedra, edges with eight equivalent Ag(1)Ni12 cuboctahedra, faces with four equivalent Ni(2)Ni8Ag4 cuboctahedra, faces with four equivalent Ag(1)Ni12 cuboctahedra, and faces with ten equivalent Ni(1)Ni8Ag4 cuboctahedra. In the second Ni site, Ni(2) is bonded to eight equivalent Ni(1) and four equivalent Ag(1) atoms to form NiNi8Ag4 cuboctahedra that share corners with four equivalent Ni(2)Ni8Ag4 cuboctahedra, corners with eight equivalent Ag(1)Ni12 cuboctahedra, edges with eight equivalent Ni(2)Ni8Ag4 cuboctahedra, edges with sixteen equivalent Ni(1)Ni8Ag4 cuboctahedra, faces with four equivalent Ni(2)Ni8Ag4 cuboctahedra, faces with six equivalent Ag(1)Ni12 cuboctahedra, and faces with eight equivalent Ni(1)Ni8Ag4 cuboctahedra. Ag(1) is bonded to four equivalent Ni(2) and eight equivalent Ni(1) atoms to form AgNi12 cuboctahedra that share corners with four equivalent Ag(1)Ni12 cuboctahedra, corners with eight equivalent Ni(2)Ni8Ag4 cuboctahedra, edges with eight equivalent Ag(1)Ni12 cuboctahedra, edges with sixteen equivalent Ni(1)Ni8Ag4 cuboctahedra, faces with four equivalent Ag(1)Ni12 cuboctahedra, faces with six equivalent Ni(2)Ni8Ag4 cuboctahedra, and faces with eight equivalent Ni(1)Ni8Ag4 cuboctahedra.
Ni3Ag1 is alpha La-derived structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Ni sites. In the first Ni site, Ni(1) is bonded to four equivalent Ni(1), four equivalent Ni(2), and four equivalent Ag(1) atoms to form NiNi8Ag4 cuboctahedra that share corners with twelve equivalent Ni(1)Ni8Ag4 cuboctahedra, edges with eight equivalent Ni(1)Ni8Ag4 cuboctahedra, edges with eight equivalent Ni(2)Ni8Ag4 cuboctahedra, edges with eight equivalent Ag(1)Ni12 cuboctahedra, faces with four equivalent Ni(2)Ni8Ag4 cuboctahedra, faces with four equivalent Ag(1)Ni12 cuboctahedra, and faces with ten equivalent Ni(1)Ni8Ag4 cuboctahedra. All Ni(1)-Ni(1) bond lengths are 2.60 Å. All Ni(1)-Ni(2) bond lengths are 2.61 Å. All Ni(1)-Ag(1) bond lengths are 2.61 Å. In the second Ni site, Ni(2) is bonded to eight equivalent Ni(1) and four equivalent Ag(1) atoms to form NiNi8Ag4 cuboctahedra that share corners with four equivalent Ni(2)Ni8Ag4 cuboctahedra, corners with eight equivalent Ag(1)Ni12 cuboctahedra, edges with eight equivalent Ni(2)Ni8Ag4 cuboctahedra, edges with sixteen equivalent Ni(1)Ni8Ag4 cuboctahedra, faces with four equivalent Ni(2)Ni8Ag4 cuboctahedra, faces with six equivalent Ag(1)Ni12 cuboctahedra, and faces with eight equivalent Ni(1)Ni8Ag4 cuboctahedra. All Ni(2)-Ag(1) bond lengths are 2.60 Å. Ag(1) is bonded to four equivalent Ni(2) and eight equivalent Ni(1) atoms to form AgNi12 cuboctahedra that share corners with four equivalent Ag(1)Ni12 cuboctahedra, corners with eight equivalent Ni(2)Ni8Ag4 cuboctahedra, edges with eight equivalent Ag(1)Ni12 cuboctahedra, edges with sixteen equivalent Ni(1)Ni8Ag4 cuboctahedra, faces with four equivalent Ag(1)Ni12 cuboctahedra, faces with six equivalent Ni(2)Ni8Ag4 cuboctahedra, and faces with eight equivalent Ni(1)Ni8Ag4 cuboctahedra.