interstitial atom

interstitial atom

[¦in·tər¦stish·əl ′ad·əm]
(crystallography)
A displaced atom which is forced into a nonequilibrium site within a crystal lattice.
References in periodicals archive ?
If the interstitial atom does not "wait" to be taken by a network trouble (vacancy, granule limit, dislocation) for jump, the diffusion coefficient can be relative big (Voiculescu, 2005).
On the shorter timescales, radiation-damaged materials underwent a "loading" process at the grain boundaries, in which interstitial atoms became trapped-or loaded-into the grain oundary.