Antifluorite structure is derived from fluorite structure by:
Correct answer: C. Interchanging the positions of positive and negative ions in the lattice
- 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
Explanation
Since the CN of Fluorite and Antifluorite structure are same, hence by interchanging the positions of cation and anions lattice can be interchanged.
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About Shape of Ionic Crystals
Ionic crystal shape depends on the regular arrangement of oppositely charged ions in a three-dimensional lattice. The topic covers coordination number, radius ratios, lattice geometry and structures such as sodium chloride, caesium chloride and zinc sulfide, which should not be confused with the molecular shapes predicted by VSEPR theory.
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