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(i) What type of non stichiometirc point...

(i) What type of non stichiometirc point defect is responsible for the pink colour of LiCI?
(ii)What type of stochiometric defects is shown by NaCI?

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(i) Metal excess defects are founds in crystals having F-centres (or colour centres) and are responsible for the colour of the potassium in KCI makes it violet and excess lithium in LiCI makes it pink
(ii) Schottky defect
or How will you distinguish between the following pairs of terms:
(i) Tetrahedral and octahedral voids
(ii) Crystal lattice and unit cell
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