Solid Solution: A solid solution is a solid-state solution composed of two or more components, where one or more solutes are dissolved in the solid solvent, forming a single homogeneous crystalline phase.
Eutectic System: A eutectic system is a type of solid-solid mixture where two or more components form a mixture with a single, unique melting point lower than the melting points of the individual components.
Interstitial Solid Solution: An interstitial solid solution is a type of solid solution where smaller atoms or ions are dispersed within the interstices (spaces) of the crystal structure of a larger host element.