KNH₂–KH: a metal amide–hydride solid solution

Abstract

We report for the first time the formation of a metal amide-hydride solid solution. The dissolution of KH into KNH₂ leads to an anionic substitution, which decreases the interaction among NH₂^- ions. The rotational properties of the high temperature polymorphs of KNH₂ are thereby retained down to room temperature.