Sodium arsenide

Sodium arsenide
Names
	IUPAC name Disodioarsanylsodium
Identifiers
CAS Number	12044-25-6;
3D model (JSmol)	Interactive image;
ChemSpider	74787;
ECHA InfoCard	100.031.762
EC Number	234-952-5;
PubChem CID	82879;
CompTox Dashboard (EPA)	DTXSID0065222 ;
	InChI InChI=1S/As.3Na Key: MMQSOEGXVXPNSH-UHFFFAOYSA-N;
	SMILES [Na][As]([Na])[Na];
Properties
Chemical formula	Na3As
Molar mass	143.89 g·mol−1
Appearance	Violet brown solid
Density	2.36 g·cm−3
Solubility in water	Hydrolysis
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Toxic, releases AsH3
Related compounds
Other anions	Sodium nitride, sodium phosphide, sodium antimonide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Sodium arsenide, also known as trisodium arsenide, is the inorganic compound of sodium and arsenic with the formula Na₃As.^[1] It is a dark colored solid that degrades upon contact with water or air. It is prepared by the reaction of the elements at 200–400 °C.^[2] The compound is mainly of interest as exhibiting an archetypal structure. The normal pressure "sodium arsenide" phase is adopted by many alkali metal pnictides. At 3.6 gigapascals, Na₃As adopts the Li₃Bi structure, which is another archetypal structure.^[3] Sodium arsenide is a crystalline solid used as a semiconductor and in photo optic applications. Its IUPAC name is disodioarsanylsodium.

At high pressures, Na₃As adopts this cubic structure (the so-called Li₃Bi motif).

References

^ Elements, American. "Sodium Arsenide". American Elements. Retrieved 2018-12-05.
^ E. Dönges (1963). G. Brauer (ed.). Alkali Metals (2nd ed.). New York: Academic Press. p. 986. {{cite book}}: |work= ignored (help)
^ Beister, Heinz Jürgen; Syassen, Karl; Klein, Jürgen (1990). "Phase Transition of Na3As under Pressure". Zeitschrift für Naturforschung B. 45 (10): 1388–1392. doi:10.1515/znb-1990-1007. S2CID 197037185.

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[1] Elements, American. "Sodium Arsenide". American Elements. Retrieved 2018-12-05.

[2] E. Dönges (1963). G. Brauer (ed.). Alkali Metals (2nd ed.). New York: Academic Press. p. 986. {{cite book}}: |work= ignored (help)

[3] Beister, Heinz Jürgen; Syassen, Karl; Klein, Jürgen (1990). "Phase Transition of Na3As under Pressure". Zeitschrift für Naturforschung B. 45 (10): 1388–1392. doi:10.1515/znb-1990-1007. S2CID 197037185.

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