Tennessee Historical Commission marker at the north end of McSween Memorial Bridge (US-321) in Newport, Tennessee. The sign recalls the location of War Ford, 0.2 miles to the east along the Pigeon River. The ford was an important crossing along the Great Indian Warpath.
Definition: a substance in which the constituent atoms, molecules, or ions are packed in a regularly ordered, repeating three-dimensional pattern. Most crystals are solids.
A crystal or crystalline solid is a solid material whose constituent atoms, molecules, or ions are arranged in an ordered pattern extending in all three spatial dimensions. Ionic crystals can form upon solidification of salts, either from a molten fluid or upon crystallization from a solution.