Answer & Solution
Vacancy defects in solids are a subtype of point imperfections.
- Point defects, as the name implies, are imperfect point-like regions in the crystal.
- The typical size of a point defect is about 1-2 atomic diameters.
- Sometimes it is also known as an intrinsic or thermodynamic defect.
- When an atom is not present at their lattice sites, then that lattice site is vacant and it creates a vacancy defect.
- Due to this, the density of a substance decreases.
|IMPERFECTIONS IN SOLIDS|
|Point Imperfections (Zero-Dimensional)||Line Imperfections (One-Dimensional)||Surface Imperfections (Two-Dimensional)||Volume Imperfections(Three-Dimensional)|
|Interstitial Impurities||Disclinations||Grain boundaries||Cracks|
|Substitutional Impurities||Twin boundaries||Inclusions|
|Schottky defect||Stacking faults||Precipitates|
|Frenkel defect||Interphase boundary||Twins|