Question

WHAT IS THE COORDINATION NUMBER IN A ROCK SALT LIKE CRYSTALLINE STRUCTURE?

Answer 1

Crystal structure is defined as the arrangement of atoms, ions, or molecules in a crystal. Crystals are solids having, in all three dimensions of space, a regular repeating internal unit of structure.

In other words - A crystal is a periodic array of atoms. In mineralogy and crystallography, crystal structure is a unique arrangement of atoms or molecules in a crystalline liquid or solid. A crystal structure is composed of a pattern, a set of atoms arranged in a particular way, and a lattice exhibiting long-range order and symmetry. Many elements and quite a few compounds are crystalline at low enough temperatures, and many of the solid materials in our everyday life (like wood, plastics and glasses) are not crystalline.