substitutional impurity

substitutional impurity

[‚səb·stə′tü·shən·əl im′pyu̇r·əd·ē]
(solid-state physics)
An atom or ion which is not normally found in a solid, but which resides at the position where an atom or ion would ordinarily be located in the lattice structure, and replaces it.
References in periodicals archive ?
Those differences in the elongation for the yield strength were produced by heat treatment with materials with interstitial but also with substitutional impurity atoms.
Researchers have reported progress in using boron doping, where boron is a substitutional impurity for carbon, to provide a p-type electronic structure.