Tetragonal phase transition

A tetragonal phase transition involves a change in the way a material's atoms are arranged, shifting from one crystal structure to another. In the tetragonal phase, the material's unit cell—the smallest repeating unit—has four sides with two sides equal and one different, forming a rectangle extended in one direction. During this transition, external factors like temperature or pressure cause the atoms to reorganize, changing the symmetry and shape of the crystal. This process affects the material's physical properties, such as symmetry, optical behavior, and strength, and is important in understanding how materials behave under different conditions.