Neptunium diarsenide

Neptunium diarsenide is a binary inorganic compound of neptunium and arsenic with the chemical formula NpAs₂.^[1][2] The compound forms crystals.^[3]

Heating stoichiometric amounts of neptunium hydride and arsenic:^[4]

${\displaystyle \mathsf{N}\mathsf{p}{\mathsf{H}}_{\mathsf{x}}\mathsf{+}\mathsf{2}\mathsf{A}\mathsf{s}\stackrel{450^{o}C}{\to }\mathsf{N}\mathsf{p}\mathsf{A}{\mathsf{s}}_{\mathsf{2}}\mathsf{+}\mathsf{(}\mathsf{x}/\mathsf{2}\mathsf{)}{\mathsf{H}}_{\mathsf{2}}}$

Neptunium diarsenide forms crystals of the tetragonal system,^[5] space group P4/nmm, cell parameters a = 0.3958 nm, c = 0.8098 nm.

Template:Arsenides

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