Schottky defect - positive & negative ions missing from crystal - Material Science

Q.  In which type of point defect, positive and negative ions are missing from the crystal?
- Published on 05 Aug 15

a. Vacancy defect
b. Interstitial defect
c. Schottky defect
d. Substitutional defect

ANSWER: Schottky defect

Related Content

 

    Discussion

  • Sravanthi   -Posted on 06 Oct 15
    Different types of defects are identified in crystals. Imperfect packing of atoms during crystallization result in point defects . Vacancy defect, interstitial defect, Frenkel defect, Schottky defect, substitutional defect are different types of point defects.

    A pair of positive and negative ions missing from a crystal result in Schottky defects. It is a point defect. Due to this defect theoretical density of material is affected and solid crystal has less density than theoretical density of material.

    If Frenkel defect occurs, a missing atom occupies interstitial position.

    A foreign atom occupies parent position or position of replaced parent atom in substitutional defect.

    If atoms miss from occupied positions, then this defect is called as vacancy defect. This type of defects arise due to thermal vibrations of atoms at high temperatures.

➨ Post your comment / Share knowledge


Enter the code shown above:

(Note: If you cannot read the numbers in the above image, reload the page to generate a new one.)
▲