Suppose that CaO is present as an impurity to Li2O The Ca2 i

Suppose that CaO is present as an impurity to Li₂O. The Ca²⁺ ion substitutes for Li⁺ ion(s). Identify the acceptable accompanying defects. (Select all that apply.)

No additional defects are required.

One O^2- vacancy for every two Ca²⁺ impurities.

One O^2- interstitial for every two Ca²⁺ impurities.

One Li⁺ vacancy for every Ca²⁺ impurity.

One Li⁺ interstitial for every Ca²⁺ impurity.

One O^2- vacancy for every Ca²⁺ impurity.

Two Li⁺ vacancies for every Ca²⁺ impurity.

Solution

Solution :

Lithium vacancies would be created when ca2+ substitutes Li+ ion .

So for every Ca2+ ion added single lithium vacancy is created. this happens to maintain charge neutrality.

Correct option is the fouth option.