Question

Why do non stoichiometric hydrides called interstitial hydrides?

Answer 1

Interstitial hydrides have a metallic bond. These compounds are non-stoichiometric(which means the number of atoms of the elements presented cannot be represented by a ratio of small whole numbers), and their composition... ... Covalent hydrideshave a covalent bond.

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Answer 2

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In transition elements there are small empty spaces between the atoms. Hydrogen gas gets adsorbed in these empty spaces to produce non-metallic hydrides, hence they are also called Interstitial hydrides.

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