Beryllium sulfide
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| Identifiers | |
|---|---|
| 13598-22-6 | |
| ChemSpider | 44415277 |
| EC number | 237-064-6 |
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| Jmol-3D images | Image |
| PubChem | 83605 |
| |
| Properties | |
| BeS | |
| Molar mass | 41.077 g/mol |
| Appearance | white crystalline |
| Density | 2.36 g/cm3 |
| Melting point | 1,800 °C (3,270 °F; 2,070 K) decomposes |
| Band gap | 7.4 eV |
| Refractive index (nD) |
1.741 |
| Structure | |
| Crystal structure | cubic |
| Thermochemistry | |
| Specific heat capacity (C) |
34 J/mol K |
| Std molar entropy (S |
34 J/mol K |
| Std enthalpy of formation (ΔfH |
-235 kJ/mol |
| Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa) | |
| Infobox references | |
Beryllium sulfide is an ionic compound from the sulfide group [1] with the formula BeS.
Preparation
Beryllium sulfide powders can be prepared by the reaction of sulfur and beryllium in a hydrogen atmosphere by heating the mixture for 10-20 minutes at temperatures from 1000-1300 °C.
Alternatively, it can be prepared by the reaction of beryllium chloride and hydrogen sulfide at 1150 °C, though this reaction will leave chlorine impurities.
References
- ↑ Kenneth A. Walsh (2009). Beryllium Chemistry and Processing. ASM International. p. 127. ISBN 087170721-7.
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