Lithium sulfide
IUPAC name	Lithium sulfide
Identifiers
CAS number	12136-58-2 Y
PubChem	6093265
EC number	235-228-1
RTECS number	OJ6439500
Properties
Molecular formula	Li2S
Molar mass	46.95 g/mol
Appearance	white solid
Density	1.66 g/cm3
Melting point	938 °C (1211 K)
Boiling point	1372 °C (1645 K)
Structure
Crystal structure	Antifluorite (cubic), cF12
Space group	Fm3m, No. 225
Coordination geometry	Tetrahedral (Li+); cubic (S2–)
Thermochemistry
Std enthalpy of formation ΔfHo298	-9.401 kJ/g
Hazards
MSDS	External MSDS
EU Index	Not listed
NFPA 704	1 3 1
Related compounds
Other anions	Lithium oxide
Other cations	Sodium sulfide Potassium sulfide
Related compounds	Lithium hydrosulfide
Y (what is this?)  (verify) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Lithium sulfide is the inorganic compound with the formula Li₂S. It crystallizes in the antifluorite motif, described as the salt (Li⁺)₂S^2–. It forms a solid yellow-white deliquescent powder, and may have a rotten egg odor.^[1]

Contents 1 Uses 2 Preparation 3 References 4 External links

[edit] Uses

Lithium sulfide is used in lithium-sulfur batteries,^[2] the system being related to the sodium-sulfur battery.

[edit] Preparation

Lithium sulfide is prepared by treating lithium with sulfur.^[3] This reaction is conveniently conducted in anhydrous ammonia.^[4]

16Li + S₈ → 8Li₂S

[edit] References

1. ^ Materials Safety Data Sheet for Lithium Sulfide
2. ^ "Battery claims greater capacity than lithium ion". Electronics Weekly. http://www.electronicsweekly.com/Articles/2005/07/12/35830/Batteryclaimsgreatercapacitythanlithiumion.htm. Retrieved 2005-09-16. 
3. ^ "Webelements – Lithium Sulfide". http://www.webelements.com/webelements/compounds/text/Li/Li2S1-12136582.html. Retrieved 2005-09-16. 
4. ^ Rankin, D. W. (1974), "Digermanyl Sulfide", Inorg. Synth. 15: 182–84 

[edit] External links

• Lithium Sulfide

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