Arsenide hydride

An arsenide hydride or hydride arsenide is a chemical compound containing hydride (H−) and arsenide (As3−) ions in a single phase. They are in the class of mixed anion compounds.

Preparation
Arsenide hydride compounds may be produced by heating metal hydride and metal arsenide mixtures under pressure.

Properties
Arsenide hydrides are under investigation as unconventional superconductors.

The hydride ions can be replaced by fluoride or oxide ions to yield variations in composition.

Reactions
when heated to 800° CaFeAsH forms three phases.

2CaFeAsH → Ca + CaFe2As2 + H2