Interstitial defect

Structure of self-interstitial in some common metals. The left-hand side of each crystal type shows the perfect crystal and the right-hand side the one with a defect.

Octahedral (red) and tetrahedral (blue) interstitial symmetry polyhedra in a face-centered cubic lattice. The actual interstitial atom would ideally be in the middle of one of the polyhedra.

Interstitials are a variety of crystallographic defects where atoms assume a normally unoccupied site in the crystal structure. In interstitial defects two or more atoms may share one lattice site, thereby increasing its total energy. Alternatively small atoms in some crystals may occupy interstitial sites in energetically favorable configurations, such as hydrogen in palladium. Interstitials can be produced by bombarding a crystal with elementary particles having energy above the displacement threshold for that crystal, but they may also exist in small concentrations in thermodynamic equilibrium.

单词	Interstitial site
释义	Interstitial site 英语百科 Interstitial defect Interstitials are a variety of crystallographic defects where atoms assume a normally unoccupied site in the crystal structure. In interstitial defects two or more atoms may share one lattice site, thereby increasing its total energy. Alternatively small atoms in some crystals may occupy interstitial sites in energetically favorable configurations, such as hydrogen in palladium. Interstitials can be produced by bombarding a crystal with elementary particles having energy above the displacement threshold for that crystal, but they may also exist in small concentrations in thermodynamic equilibrium.
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Interstitial site

Interstitial defect