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InterviewSolution
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6. Which point defect in crystal increase density of solid? |
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Answer» In the interstitial defects, the atom gets dislocated from its initial position(which may or may not be of the same molecule) and gets transferred to other position in between the other atoms. If we just assume that in the picture above, a smaller dissimilar atom is located in between the regular symmetrical arrangement of atom. So if we consider just the four atoms surrounding the smaller atom, the volume never changes, while there is a net addition of mass due to that smaller atom. By the relation of mass and density, we know that mass is proportional to density at constant volume. Hence the density of the solid somewhat increases. |
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