Question

Anti fluorite structure is derived from fluorite structure by -

• A. Heating fluorite crystal lattice
• B. Subjecting fluorite structure to high pressure
• C. Interchanging the positions of positive and negative ions in the lattice
• D. Introducing the impurities to the lattice

Answer 1

Answer: (C)

Interchanging the positions of positive and negative ions in the lattice

Answer 2

Since the CN of fluorite and antifluorite structure are same, hence by interchanging the positions of cation and anions lattice can be interchanged.