Lithium sulfide
From Infogalactic: the planetary knowledge core
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| Names | |
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| IUPAC name
Lithium hydrosulfide
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| Preferred IUPAC name
Lithium sulfide
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| Identifiers | |
12136-58-2  |
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| ChemSpider | 8466196 |
| EC Number | 235-228-1 |
| Jmol 3D model | Interactive image Interactive image |
| PubChem | 10290727 |
| RTECS number | OJ6439500 |
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| Properties | |
| Li2S | |
| Molar mass | 45.95 g/mol |
| Appearance | white solid |
| Density | 1.66 g/cm3 |
| Melting point | 938 °C (1,720 °F; 1,211 K) |
| Boiling point | 1,372 °C (2,502 °F; 1,645 K) |
| very soluble | |
| Solubility | very soluble in ethanol |
| Structure | |
| Antifluorite (cubic), cF12 | |
| Fm3m, No. 225 | |
| Tetrahedral (Li+); cubic (S2−) | |
| Thermochemistry | |
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Std molar
entropy (S |
63 J/mol K |
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Std enthalpy of
formation (ΔfH |
-9.401 kJ/g or -447 kJ/mol |
| Vapor pressure | {{{value}}} |
| Related compounds | |
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Other anions
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Lithium oxide |
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Other cations
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Sodium sulfide Potassium sulfide |
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Related compounds
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Lithium hydrosulfide |
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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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| Infobox references | |
Lithium sulfide is the inorganic compound with the formula Li2S. It crystallizes in the antifluorite motif, described as the salt (Li+)2S2−. It forms a solid yellow-white deliquescent powder. In air, it easily hydrolyses to release hydrogen sulfide (rotten egg odor).[1]
Preparation
Lithium sulfide is prepared by treating lithium with sulfur.[2] This reaction is conveniently conducted in anhydrous ammonia.[3]
- 2 Li + S → Li2S
The THF-soluble triethylborane adduct of lithium sulfide can be generated using superhydride.[4]
Reactions and applications
Lithium sulfide has been considered for use in lithium-sulfur batteries.[5]
References
- ↑ Greenwood, N. N.; & Earnshaw, A. (1997). Chemistry of the Elements (2nd Edn.), Oxford:Butterworth-Heinemann. ISBN 0-7506-3365-4.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Gladysz, J. A.; Wong, V. K. and Jick, B. G., "Reduction of S-S Bonds with LiBHEt3", Tetrahedron, 1979, 35, 2329.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
