Podcast
Questions and Answers
What type of crystal defect occurs when a particle is missing from its regular site in the crystal lattice?
What type of crystal defect occurs when a particle is missing from its regular site in the crystal lattice?
- Frenkel defect
- Self-interstitial defect
- Vacancy defect (correct)
- Schottky defect
How are vacancies created in a crystal lattice?
How are vacancies created in a crystal lattice?
- By increasing pressure
- By heating the substance (correct)
- By adding extra particles
- By cooling the substance
What can minimize the defects in a crystal lattice?
What can minimize the defects in a crystal lattice?
- Heating the substance slowly (correct)
- Cooling the substance rapidly
- Increasing the crystallization rate
- Creating self-interstitial defects
At what temperature are ideal crystals with no imperfections possible?
At what temperature are ideal crystals with no imperfections possible?
Which type of crystal defect involves additional particles being present in the crystal lattice?
Which type of crystal defect involves additional particles being present in the crystal lattice?
What happens to defects in a crystal when crystallization occurs at a faster rate?
What happens to defects in a crystal when crystallization occurs at a faster rate?
What happens to the mass of a substance in a vacancy defect?
What happens to the mass of a substance in a vacancy defect?
What is the impact of a vacancy defect on the density of a substance?
What is the impact of a vacancy defect on the density of a substance?
What type of defect results when a particle is displaced within a crystal structure?
What type of defect results when a particle is displaced within a crystal structure?
In a self interstitial defect, what occupies the interstitial sites in a crystal structure?
In a self interstitial defect, what occupies the interstitial sites in a crystal structure?
What happens to the mass of a substance in a self interstitial defect?
What happens to the mass of a substance in a self interstitial defect?
How does a self interstitial defect impact the density of a substance?
How does a self interstitial defect impact the density of a substance?
Why is Frenkel defect not found in pure alkali metal halides?
Why is Frenkel defect not found in pure alkali metal halides?
How can Frenkel defect be described in terms of vacancy and interstitial defects?
How can Frenkel defect be described in terms of vacancy and interstitial defects?
What type of defect arises when the ratio of cations to anions becomes different from that indicated by the chemical formula?
What type of defect arises when the ratio of cations to anions becomes different from that indicated by the chemical formula?
In a nonstoichiometric compound with metal deficiency defects, what changes without affecting the crystal structure?
In a nonstoichiometric compound with metal deficiency defects, what changes without affecting the crystal structure?
What kind of impurities can create vacancies in ionic solids?
What kind of impurities can create vacancies in ionic solids?
Why do pure alkali metal halides not exhibit Frenkel defects?
Why do pure alkali metal halides not exhibit Frenkel defects?
