Question

Can anyone explain the anti-fluorite structure of Na2O in detail?

Answer 1

Explanation:

1.7.2.1 Antifluorite

FCC packing of anions

All tetrahedral sites filled by cations

Coordination : Anions: 8, Cations: 4

Chemical formula: M2X

Example: Li2O, Na2O, K2O

Radius ratio (rc/ra): 0.225-0.414

Examples: r(Li+) : 0.059 nm, r(Na+) : 0.099 nm, r(O-) : 0.14 nm

Hope it helps you