Lithium sulfide
Names | |
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IUPAC name
Lithium hydrosulfide
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Preferred IUPAC name
Lithium sulfide | |
Identifiers | |
3D model (
JSmol ) |
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ChemSpider | |
ECHA InfoCard
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100.032.013 |
EC Number |
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PubChem CID
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RTECS number
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UNII | |
CompTox Dashboard (EPA)
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Properties | |
Li2S | |
Molar mass | 45.95 g/mol |
Appearance | white solid |
Density | 1.67 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, hydrolyses to LiOH and H2S | |
Solubility | very soluble in ethanol |
Structure | |
Antifluorite (cubic), cF12
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Fm3m, No. 225 | |
Tetrahedral (Li+); cubic (S2−) | |
Thermochemistry | |
Std molar
entropy (S⦵298) |
63 J/mol K |
Std enthalpy of (ΔfH⦵298)formation |
-9.401 kJ/g or -447 kJ/mol |
Hazards | |
NFPA 704 (fire diamond) | |
Lethal dose or concentration (LD, LC): | |
LD50 (median dose)
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240 mg/kg (oral, rat)[1] |
Safety data sheet (SDS) | External MSDS |
Related compounds | |
Other anions
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Lithium oxide Lithium selenide Lithium telluride Lithium polonide |
Other cations
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Sodium sulfide Potassium sulfide Rubidium sulfide Caesium sulfide |
Related compounds
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Lithium hydrosulfide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Lithium sulfide is the
deliquescent powder. In air, it easily hydrolyses to release hydrogen sulfide (rotten egg odor).[2]
Preparation
Lithium sulfide is prepared by treating lithium with sulfur. This reaction is conveniently conducted in
anhydrous ammonia.[3]
- 2 Li + S → Li2S
The THF-soluble
superhydride.[4]
Reactions and applications
Lithium sulfide has been considered for use in lithium–sulfur batteries.[5]
References
- ^ https://chem.nlm.nih.gov/chemidplus/rn/12136-58-2 [dead link]
- ISBN 0-7506-3365-4.
- ISBN 978-0-470-13246-3.
- .
- ^ "Battery claims greater capacity than lithium ion". Electronics Weekly. 12 July 2005. Retrieved 2005-09-16.