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substitutional impurity

 
Sci-Tech Dictionary: 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.


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