Sodium arsenide
Chemical compound
From Wikipedia, the free encyclopedia
Sodium arsenide, also known as trisodium arsenide, is the inorganic compound of sodium and arsenic with the formula Na3As.[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), 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.[citation needed]
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| Names | |
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| IUPAC name
Disodioarsanylsodium | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.031.762 |
| EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| Na3As | |
| Molar mass | 143.890903 g·mol−1 |
| Appearance | Violet brown solid[1] |
| Density | 2.36 g/cm3 |
| Hydrolysis[citation needed] | |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards |
Toxic, releases AsH3 |
| Related compounds | |
Other anions |
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Other cations |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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]
