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Find the coordination of Na^(o+) in Na(2...

Find the coordination of `Na^(o+)` in `Na_(2)O`.

Text Solution

Verified by Experts

The correct Answer is:
4
`NaO_(2)` has fcc structure.
`:. Z_(eff) = 4//"unit cell"`
`:.` Formula `= 4Na_(2)O = N_(8)O_(4)`
`:.` Coordination number of `Na^(o+) = 4`
Antifluorite-type structure have `(4:8) CN` and `Na^(o+)` ions are in all `TVs`.
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