Neptunium diarsenide

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

Neptunium diarsenide

Identifiers
CAS Number	39350-10-2 Y
3D model (JSmol)	Interactive image
InChI InChI=1S/As2.Np/c1-2;/q-4;+4 Key: QGMNOYVKXOFBOP-UHFFFAOYSA-N
SMILES [As-2][As-2].[Np+4]
Properties
Chemical formula	NpAs 2
Molar mass	386.84
Appearance	Crystals
Related compounds
Related compounds	Neptunium arsenide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Synthesis

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

${\displaystyle {\mathsf {NpH_{x}+2As\ {\xrightarrow {450^{o}C}}\ NpAs_{2}+(x/2)H_{2}}}}$

Physical properties

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