Question

what is the coordination no. of sodium in sodiumoxide

Answer 1

Na2O

d°(O) = - 2

2d°(Na) + d°(O) = 0

d°(Na) = - d°(O) / 2

d°(Na) = - (-2) / 2

d°(Na) = + 1

Sodium oxide is a chemical compound with the formula Na2O. It is used in ceramics and glasses, though not in a raw form. It is the base anhydride of sodium hydroxide, so when water is added to sodium oxide NaOH is produced.

Na2O + H2O → 2 NaOH The alkali metal oxides M2O (M = Li, Na, K, Rb) crystallise in the antifluorite structure. In this motif the positions of the anions and cations are reversed relative to their positions in CaF2, with sodium ions tetrahedrally coordinated to 4 oxide ions and oxide cubically coordinated to 8 sodium ions.