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प्रश्न
Explain the following term with a suitable example:
Interstitials
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उत्तर
- When certain constituent particles, such as atoms or molecules, occupy interstitial positions, we refer to a crystal as having an interstitial defect.
- As shown in the figure, the presence of interstitial particles increases the substance’s density.
- Non-ionic solids exhibit interstitial flaws and vacancies.
- Ionic solids do not have simple vacancies or interstitial flaws as previously described because they must always maintain electrical neutrality.
- Rather, they display additional flaws referred to as Frenkel and Schottky faults.
- An example of interstitials is Carbon in Iron (Steel); Carbon atoms occupy interstitial sites in the iron lattice, making the metal stronger and harder.
संबंधित प्रश्न
Ionic solids containing large differences in sizes of ions show ____________.
Defects in solids can be studied using
Point defect is also known as ____________.
Frenkel defects are not found in alkali metal halides because ____________.
The following diagram shows:
Alkali halids do not show Frenkel defect because ____________.
Silver halides generally show:
In a Schottky defect ____________.
Cations are present in the interstitial sites in ______.
Schottky defect is observed in crystals when ______.
Frenkel defect is also known as:
(i) stoichiometric defect
(ii) dislocation defect
(iii) impurity defect
(iv) non-stoichiometric defect
Which of the following defects decrease the density?
(i) Interstitial defect
(ii) Vacancy defect
(iii) Frankel defect
(iv) Schottky defect
Given below are two statements, one is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion: In any ionic solid (MX) with Schottky defects, the number of positive and negative ions are same.
Reason: Equal number of cation and anion vacancies are present.
If NaCl is doped with 10–4 mole percent of SrCl2 the concentration of cation vacancies will be
The incorrect statement about the imperfections in solids is ______.
Which type of ‘defect’ has the presence of cations in the interstitial sites?
