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प्रश्न
What are the consequences of the Schottky defect in crystals?
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उत्तर
- A decrease in density occurs when an equal number of cations and anions are missing from the crystal lattice.
- To reduce the mass of the crystal without significantly changing its volume, leading to a decrease in density.
- There is no change in stoichiometry since both types of ions are missing in equal amounts; the chemical composition of the crystal remains unchanged.
- Maintains electrical neutrality removing equal amounts of positive and negative ions ensures that the crystal remains electrically neutral.
- The presence of vacant sites increases ionic conductivity by enabling ions to move more freely through the lattice, thereby enhancing it further.
- If the crystal lattice has a high concentration of vacancies, it can become slightly less stable and reduce the mechanical strength of the crystal.
संबंधित प्रश्न
Explain with diagram, the vacancy defect.
How are nonstoichiometric point defects classified? Explain with diagram the metal deficiency defect.
Give the classification of stoichiometric point defects.
What is a substitutional impurity defect?
Explain solid solutions of metals and vacancy through aliovalent cations.
Which of the following is an example of substitutional impurity defect?
When a cation or anion from ionic solid leaves its regular lattice site and moves to occupy an interstitial site, it is called as ____________.
Which among the following solids shows Frenkel defect?
Which of the following match is CORRECT?
(I) Frenkel defect: Electrical neutrality of the compound is preserved.
(II) Schottky defect: Density of the substance decreases.
(III) Schottky defect: Combination of vacancy defect and interstitial defect.
(IV) Frenkel defect: Small difference between size of cation and anion.
Which among the following statements is true about Schottky defect?
Which of the following pair of ionic crystals show Schottky defect?
Schottky defect in crystals is observed when ____________.
Explain metal deficiency defect with examples.
AgBr shows which type of defect?
Name a compound where Frenkel defect is found.
In which among the following solids, Schottky defect is not observed?
When electrons are trapped into the crystal in anion vacancy, the defect is known as ______.
Explain the following term:
Substitutional impurity defect
What is a crystal defect?
Explain the interstitial defect.
What is a vacancy defect?
Give the disadvantages of a vacancy defect.
What are point defects?
