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Name the type of point defect that occurs in a crystal of zinc sulphide?
A common type of point defect that occurs in a crystal of zinc sulphide is a vacancy defect. In this defect, an atom is missing from its lattice position, creating a gap or a vacancy in the crystal structure.
Why does frenkel defect not change the density of AgCl crystals?
Frenkel defect in silver chloride involves the cation moving from its crystal lattice site into an interstitial space. This defect does not affect the overall crystal structure or volume, so the density of the AgCl crystal remains unchanged.
What is difference between shotkey defect and frankel defect?
1).schottky defect arises due to departue of ions (both cation and anion in equal ratio) from crystal lattice leaving holes that favour conductivity. The equal no of ions depart because to maintain the electrical neutrality of crystal. It was discovered by walter.H schottky in 1930. But in frenkel defect ions(cations) are missing from there normal lattice site and occupying an interstitial site between the lattice points. They dont depart from crystal lattice. Because no departure occure so crystal remain electrically neutral. It was discovered by Yakov frenkel in 1926. 2) schottky defect is only vacancy defect but frenkel defect is vacancy as well as interstitial defect. 3). Schottky defect decreases density and strength of the crystal. But frenkel defect doesnt affect density. 4).schottky defect is shown by the ionic solids having high coordination no and approx. same size of cation and anion(i.e r+ve/r-ve approaches to 1) While frenkel defect is shown by the compound having low coordination no and size of anion larger than cation(i.e r+ve/r-ve approches the minimum value). By Sandeep Singh Lingwal Srinagar, Uttrakhand
What type of defect is produced when AgCl is doped with CdCl2?
When AgCl is doped with CdCl2, a Schottky defect is produced. This occurs when an equal number of cations and anions are missing from their lattice sites, leading to the formation of vacancies in the crystal structure.
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.
What is the effect of frenkel schottky defect on elictrical conductivity?
Both Frenkel and Schotty defects improve the electrical conductivity of an ionic crystal.
Where defects can occur in crystal structures?
Defects in crystal structures can occur at various locations, such as point defects (vacancies, interstitials, substitutional impurities), line defects (dislocations), and surface defects (grain boundaries, stacking faults). These defects can influence the physical and chemical properties of the material, including its mechanical strength, electrical conductivity, and optical behavior.
Why AgBr shows both frenkel and schotky defect?
AgBr can exhibit both Frenkel and Schottky defects due to the relative size difference between the cation (Ag+) and anion (Br-) in the crystal lattice. The smaller Ag+ cation can easily migrate to a vacant cation site through a Frenkel defect, while the creation of cation and anion vacancies simultaneously forming a Schottky defect is also feasible due to the ionic nature of the compound.
What is ionic defect?
Ionic defects are structural imperfections in a crystal lattice that result from the presence of missing or extra ions in the lattice. These defects can affect the material's properties, such as electrical conductivity or optical behavior, by influencing the movement of ions within the lattice. Examples of ionic defects include vacancies, interstitial ions, and substitutional impurities.
What is the difference between Defect and Defective?
A defective product has a defect: "My phone is defective" "What defect does it have?" "The defect is that the screen is broken" To defect can also mean to switch sides e.g. from an army or a political party
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.
How do you overcome the building defect?
Depends, what defect?
