Chemistry:Sodium arsenide
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| IUPAC name
Disodioarsanylsodium
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3D model (JSmol)
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| Properties | |
| Na 3As | |
| Molar mass | 143.890903 g·mol−1 |
| Appearance | Violet brown solid[1] |
| Density | 2.36 g/cm3 |
| Hydrolysis[citation needed] | |
| Hazards | |
| Main hazards | Toxic, releases AsH 3 |
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Other anions
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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 Na
3As.[2] It is a dark colored solid that degrades upon contact with water or air. 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 GPa (520,000 psi), Na
3As adopts the Li
3Bi 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.[citation needed]
Synthesis
It is prepared by passing 350–450 °C (662–842 °F) sodium vapor over preheated elemental arsenic in an evacuated tube and removing excess sodium at 450 °C (842 °F) under high vacuum.[1]
References
- ↑ 1.0 1.1 Dönges, E. (1963). "Alkali Metals". in Brauer, G.. Handbook of Preparative Inorganic Chemistry. 1 (2nd ed.). New York, NY: Academic Press. p. 986. https://archive.org/details/Handbook_of_Preparative_Inorganic_Chemistry_1_2_Brauer/page/n1009/mode/1up.
- ↑ Elements, American. "Sodium Arsenide". https://www.americanelements.com/sodium-arsenide-12044-25-6.
- ↑ 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.
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