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What are the differences between the Frenkel and Schottky defects?
Wiki User
∙ 16y ago
A Schottky defect is when 2 oppositely charged ions leave their normal lattice positions forming 2 vacancies in the lattice structure.
This contrasts to a Frenkel defect, where 1 ion simple moves from it's normal lattice position to an interstitial site (tetrahedral/octahedral hole).
Wiki User
∙ 16y ago
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Why AgBr shows both frenkel and schottky defect?
because the size of ions are enough to show both defects
Which point defect lowers the density of crystals?
Any change in the configuration of the lattice of the crystal which causes the crystal structure to deviate from the ideal structure is called a crystal structure. It is of the following types - Point defects Line defects Surface defects volume defects
Why does the schottky defect decrease the densit of a solid?
The defect forms when oppositely charged ions leave their lattice sites, creating vacancies. These vacancies are formed in stoichiometric units, to maintain an overall neutral charge in the ionic solid. The vacancies are then free to move about as their own entities. Normally these defects will lead to a decrease in the density of the crystal.
Why defects in crystals are called thermodynamic defects?
crystalline defets are present in a crystal due to the presence of impurities.
What are the defects of plastics?
defects like airburs,colour streaks,flash,flow line, jeeting, etc
What is the effect of frenkel schottky defect on elictrical conductivity?
Both Frenkel and Schotty defects improve the electrical conductivity of an ionic crystal.
Why AgBr shows both frenkel and schottky defect?
because the size of ions are enough to show both defects
Why does AgBr show both Frenkel and Schottky defects?
The radius ratio for AgBr is intermediate. Thus it shows both frenkel and schottky defects. The major defect in AgBr is the Frenkel defect. It has a rocksalt structure i.e. CCP lattice of of Br with atoms of Ag occupying all octahedral holes.Ag moves from octahedral to tetrahedral sites causing only cations to precipitate. Schottky defect arise due to missing of ions from their lacttice point and frenkel arise when the mmissing ions occupy interstitial sites. in AgBr, ag+ ion is small in size and when removed from lacttice point they can occupy interstitial site and therefore show both frenkel and schottky defect. SCHOTTKY Defect in AgBr is exhibited due to precipitation of both Cations and Anions.
Why AgBr shows both frenkel and schotky defect?
When the both the cations and anions are absent from the crystal lattice it is called Schottky defect. This defect is shown when the anions and cations have comparable size. The Frenkel defect is shown by ionic molecules when their is a large difference in the size of anions and cations. The smaller anions are very much mobile and they occupy interstitial site. AgBr has cations and anions with comparable size and hence it shows Schottky defect but the Ag+ ion is very much mobile and it easily occupies interstitial place getting dislocated from its original place, that's why the ionic crystal AgBr shows both Schottky and Frenkel defects.
Which point defect lowers the density of crystals?
Any change in the configuration of the lattice of the crystal which causes the crystal structure to deviate from the ideal structure is called a crystal structure. It is of the following types - Point defects Line defects Surface defects volume defects
What are the differences between natural and artificial defects in timber?
Natural defect are caused naturally,while artificial defects are caused by human activities
Are the sizes of Na plus and cl- same in schottky defect?
Yes, Schottky defects are created when equal number of cations (Na+) and anions (Cl-) are missing from some ionic compound, since they have single charges (= equal, = 1 as absolute value)
What is the Difference between hereditary and environmental defects?
What is the difference between hereditary and evironmental defects
What are septal defects?
hearts with septal defects (holes between pumping chambers)
What is the difference between defect detection and defect prevention?
The defects detection is the validation process. The defects prevention is a verification process.
What is the differences between product quality and service quality?
one is quality of the service and the other is quality of the product. Product quality usually includes features, performance, defects etc. Service quality includes delivery time, knowledge of delivery personnel etc.
Why does the schottky defect decrease the densit of a solid?
The defect forms when oppositely charged ions leave their lattice sites, creating vacancies. These vacancies are formed in stoichiometric units, to maintain an overall neutral charge in the ionic solid. The vacancies are then free to move about as their own entities. Normally these defects will lead to a decrease in the density of the crystal.
