What Is The Structure Of Sodium Sulfide?

The structure of sodium sulfide (Na2S) is composed of two sodium cations (Na+) and one sulfur anion (S2-). The sulfur atom has a tetrahedral geometry with the two negatively charged electrons in the outermost shell occupying two of the four available positions. The remaining two positions are occupied by the lone pair of electrons on each of the sulfur atoms, which form covalent bonds with the sodium atoms. The resulting compound has a crystal lattice structure, where sodium ions are surrounded by six sulfur ions and vice versa, forming a 3D network of Na+ and S2- ions held together by ionic bonds.