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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).
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Why AgBr shows both frenkel and schottky defect?
AgBr can exhibit both Frenkel and Schottky defects due to the presence of both cation (Ag+) and anion (Br-) vacancies in its crystal structure. Frenkel defect occurs when a cation occupies an interstitial site, while a Schottky defect involves the simultaneous absence of a cation and anion from their respective lattice sites. The relative sizes of the cation and anion in AgBr make both types of defects possible.
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.
Will you survive if you combine spider DNA with human DNA?
No, combining spider DNA with human DNA would not result in a viable or functional organism. Genetic differences between species are not easily reconcilable and would likely lead to severe developmental defects or failure to thrive.
Why defects in crystals are called thermodynamic defects?
Defects in crystals are called thermodynamic defects because they influence the overall energy or thermodynamic properties of the crystal lattice. These defects can affect the stability, entropy, and other thermodynamic properties of the crystal structure. They are considered in the context of thermodynamics as they impact the equilibrium state and behavior of the crystal material.
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 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 schottky defect?
AgBr can exhibit both Frenkel and Schottky defects due to the presence of both cation (Ag+) and anion (Br-) vacancies in its crystal structure. Frenkel defect occurs when a cation occupies an interstitial site, while a Schottky defect involves the simultaneous absence of a cation and anion from their respective lattice sites. The relative sizes of the cation and anion in AgBr make both types of defects possible.
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.
Is there change in volume of a crystal having schottky defect?
Yes, a crystal with Schottky defects can have a change in volume due to the vacancies created by the missing atoms. This can lead to a decrease in the total volume of the crystal, impacting its overall density and properties.
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)
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 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 Difference between hereditary and environmental defects?
Hereditary defects are passed down through genes from one generation to the next, while environmental defects are caused by factors in the external environment such as exposure to toxins, radiation, or infections. Hereditary defects are usually present at birth and can affect multiple family members, while environmental defects may develop later in life due to specific environmental exposures.
What are the differences between natural and artificial defects in timber?
Well, hello there, friend! Natural defects in timber, like knots and cracks, are caused by the tree's growth and environment, adding character and uniqueness to the wood. On the other hand, artificial defects, such as holes or saw cuts, are made by humans during processing or crafting the timber. Both types of defects can be embraced and incorporated into woodworking projects to create something truly special and one-of-a-kind. Just remember, there are no mistakes in woodworking, only happy little accidents!
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.
