Na4CdP2 crystallizes in the trigonal R-3m space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to four equivalent P(1) atoms to form a mixture of distorted edge and corner-sharing NaP4 tetrahedra. In the second Na site, Na(2) is bonded in a 3-coordinate geometry to three equivalent P(1) atoms. Cd(1) is bonded in a distorted linear geometry to two equivalent P(1) atoms. P(1) is bonded in a body-centered cubic geometry to three equivalent Na(2), four equivalent Na(1), and one Cd(1) atom.
Na4CdP2 crystallizes in the trigonal R-3m space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to four equivalent P(1) atoms to form a mixture of distorted edge and corner-sharing NaP4 tetrahedra. There is one shorter (2.88 Å) and three longer (3.00 Å) Na(1)-P(1) bond lengths. In the second Na site, Na(2) is bonded in a 3-coordinate geometry to three equivalent P(1) atoms. All Na(2)-P(1) bond lengths are 2.93 Å. Cd(1) is bonded in a distorted linear geometry to two equivalent P(1) atoms. Both Cd(1)-P(1) bond lengths are 2.40 Å. P(1) is bonded in a body-centered cubic geometry to three equivalent Na(2), four equivalent Na(1), and one Cd(1) atom.