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This is caused when an ion moves into an interstitial site and creates a vacancy.
There are also four equivalent interstitial sites.
Carbon atoms get trapped in the interstitial sites of the iron lattice and make it stronger.
The positive muons usually adopt interstitial sites of the crystallographic lattice.
For the reduced n-type, with cation in excess on the interstitial site:
The smaller ion (usually the cation) is displaced from its lattice position to an interstitial site.
Solute atoms must be smaller than the interstitial sites in the solvent lattice.
The atoms crowd into the interstitial sites, causing the bonds of the solvent atoms to compress and thus deform.
The oxide crystal structure is based on a closed-pack array of oxygen anions, with metal cations occupying interstitial sites.
This is neither a vacant site nor is the atom on an interstitial site and it is called a substitutional defect.
Small atoms in some crystals can occupy interstitial sites in an energetically favourable configuration, such as hydrogen in palladium.
For lattice diffusion of atoms to occur in a material, neighboring lattice sites or interstitial sites in the crystal structure must be free.
The copper ions are distributed in a complicated manner over interstitial sites with both trigonal as well as distorted tetrahedral coordination and are rather mobile.
Extrinsic centres are those acquired from the parent medium during crystallization, such as impurities in surface, regular lattice and interstitial sites, or compositional inhomogeneities between different parts of a crystal.
One form of a Frenkel defect reaction in MgO with the oxygen ion leaving the lattice and going into the interstitial site written in Kröger-Vink notation:
Magnesium or iron ions are located in the interstitial sites; they do not contribute significantly to the lattice framework, which is held by Ti-O bonds via the corners of the octahedra.
These defects, in the form of both lattice vacancies and atoms at interstitial sites, have the effect of temporarily trapping the electrons and holes which are created when ionizing particles pass through the detector.
Similarly the B saturated AB(c) is B rich and p-type through the incorporation of vacant sites in the A sublattice or B atoms in interstitial sites acting as acceptors.
Similarly to Schottky defect, a Frenkel defect is an intrinsic point defect that produces a vacancy site on either the cation or anion sub-lattice along with an interstitial site on that same lattice.
The A-saturated compound is usually n-type indicating an excess of element A through the incorporation of vacant sites in the B sublattice or A atoms in interstitial sites acting as donors in the electronic energy band structure.
The irradiation can occur in the laboratory or in the nature (see Diamond enhancement - Irradiation); it produces primary defects named frenkel defects (carbon atoms knocked off their normal lattice sites to interstitial sites) and remaining lattice vacancies.
After it is displaced from its initial lattice site, the PKA can induce the subsequent lattice site displacements of other atoms if it possesses sufficient energy, or come to rest in the lattice at an interstitial site if it does not.