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Electrons confined within anion voids in a crystal are referred to as what?

1. Electrons confined in anion voids.
2. Known as F-centres.
3. F-centres in a lattice.
4. Not related to the above.

Correct answer: Electrons confined in anion voids.

Solution

F-centres are formed when electrons occupy anion vacancies in a crystal lattice, imparting color to the crystal.

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