NaCu3 is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. Na(1) is bonded to four equivalent Cu(2) and eight equivalent Cu(1) atoms to form a mixture of edge, face, and corner-sharing NaCu12 cuboctahedra. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to four equivalent Na(1) atoms to form a mixture of distorted edge and corner-sharing CuNa4 cuboctahedra. In the second Cu site, Cu(2) is bonded in a distorted square co-planar geometry to four equivalent Na(1) atoms.
NaCu3 is Uranium Silicide-like structured and crystallizes in the tetragonal I4/mmm space group. Na(1) is bonded to four equivalent Cu(2) and eight equivalent Cu(1) atoms to form a mixture of edge, face, and corner-sharing NaCu12 cuboctahedra. All Na(1)-Cu(2) bond lengths are 2.69 Å. All Na(1)-Cu(1) bond lengths are 2.72 Å. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded to four equivalent Na(1) atoms to form a mixture of distorted edge and corner-sharing CuNa4 cuboctahedra. In the second Cu site, Cu(2) is bonded in a distorted square co-planar geometry to four equivalent Na(1) atoms.