ChemicalBook CAS DataBase List 7789-24-4

7789-24-4

Name	Lithium fluoride
CAS	7789-24-4
EINECS(EC#)	232-152-0
Molecular Formula	FLi
MDL Number	MFCD00011090
Molecular Weight	25.94
MOL File	7789-24-4.mol

Chemical Properties

Appearance

White powder

Melting point

845 °C (lit.)

Boiling point

1681 °C

bulk density

600kg/m3

density

2.64 g/mL at 25 °C(lit.)

vapor pressure

0Pa at 25℃

refractive index

1.3915

1680°C

storage temp.

Store at +5°C to +30°C.

solubility

Soluble in 0.29 g/100 mL (20°C) and hydrogen fluoride. Insoluble in alcohol.

form

random crystals

color

White to off-white

Specific Gravity

2.635

6.0-8.5 (25℃, 0.01M in H2O)

Stability:

Stable, but hygroscopic. Hydrolyzes in the presence of water to form hydrofluoric acid, which attacks glass-do not store in glass bottles. Incompatible with aqueous solutions, strong acids, strong oxidizing agents.

Water Solubility

0.29 g/100 mL (20 ºC)

Specific Heat Capacity

Cp(crystal):1.6037J/(g·K),at 25℃

Thermal Conductivity

11.088 W/(m·K) (crystal)

Crystal Structure

NaCl type

Safety Data

Symbol(GHS)	GHS06
Signal word	Danger
Hazard statements	H301-H315-H319-H335
Precautionary statements	P301+P310+P330-P302+P352-P305+P351+P338
Hazard Codes	T
Risk Statements	R25:Toxic if swallowed. R32:Contact with acids liberates very toxic gas. R36/37/38:Irritating to eyes, respiratory system and skin . R23/24/25:Toxic by inhalation, in contact with skin and if swallowed . less more
Safety Statements	S22:Do not breathe dust . S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice . S36/37/39:Wear suitable protective clothing, gloves and eye/face protection . S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) . less more
RIDADR	UN 3288 6.1/PG 3
WGK Germany	2
RTECS	OJ6125000
F	10-21
Hazard Note	Toxic
TSCA	Yes
REACH Registrations	Active
HazardClass	6.1
PackingGroup	III
HS Code	28261900
Storage Class	6.1D - Non-combustible acute toxic Cat.3 toxic hazardous materials or hazardous materials causing chronic effects
Hazard Classifications	Acute Tox. 4 Oral Eye Irrit. 2
Safety Profile	Poison by ingestion and subcutaneous routes. When heated to decomposition it emits toxic fumes of F-. Used as a flux in enamels, glasses, glazes, and weldmg. See also FLUORIDES and LITHIUM COMPOUNDS. less more
Hazardous Substances Data	7789-24-4(Hazardous Substances Data)
Toxicity	LD in guinea pigs (mg/kg): 200 orally, 2000 s.c. (Waldbott) less more

Raw materials And Preparation Products

Hazard Information

Chemical Properties

Lithium fluoride is a white crystalline solid. It is not hygroscopic as are the other lithium halides and is not affected by exposure to the air. Lithium fluoride is the least soluble of the alkali metal fluorides. This characteristic likens it to the alkaline earth fluorides. Lithium fluoride is different from the other lithium halides in that it does not form hydrates which can be isolated from solution. Lithium fluoride does show an increase in solubility as hydrofluoric acid is added to an aqueous solution. Under these conditions the fluoride ion is converted to the bifluoride ion, HF-2, allowing further dissolving of the solid lithium fluoride.

Physical properties

White cubic crystals; refractive index 1.3915; density 2.635 g/cm³; melts at 845°C; vaporizes at 1,676°C; very slightly soluble in water 0.27 g/100g at 18°C; soluble in hydrofluoric acid; insoluble in alcohol.

Flammability and Explosibility

Nonflammable

reaction suitability

reagent type: catalyst
core: lithium

Battery Materials

You Fan and colleagues^[7] introduce reactive lithium fluoride in oly(ethylene oxide) (PEO)-based electrolytes, to revitalize bulk Na+ transport and interfacial stability simultaneously in solid-state PEO-based sodium batteries.

Purification Methods

Possible impurities are LiCO3, H2O and HF. These can be removed by calcining it at red heat, then pulverizing it with a Pt pestle and storing it in a paraffin bottle. Its solubility in H2O is 0.27% at 18o. It volatilises between 1100-1200o. [Kwasnik in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 235 1963].

Structure and conformation

The space lattice of LiF belongs to the cubic system, and its rock salt structure has a lattice constant of a=0.40173 nm and Li-F=0.201 nm. The cleavage plane is (100).

Material Safety Data Sheet(MSDS)

Questions And Answer

Description
Lithium Fluoride (LiF) has the lowest refractive index of all common infrared materials. It possesses the highest UV transmission of any material, being able to transmit significantly into the VUV region at the hydrogen Lyman-alpha line (121nm). Lithium fluoride can be applied in rechargeable Li batteries, in radiation dosimeter for personnel monitoring as well as radiation research, as an optical material, as a heat sink material, to produce ceramics, and to dissolve fluid fuel for molten salt reactors.

lithium fluoride crystal ;
Uses
Lithium Fluoride (LiF) is a water insoluble Lithium source for use in oxygen-sensitive applications, such as metal production. It is most widely used as a flux in the production of ceramics, such as enamels, glasses and glazes. Similarly it is also used in brazing and welding fluxes and molten salt chemistry in metallurgy.
Lithium fluoride is also used for:
1. X-Ray monochromator plates as an analysis crystal: Lithium fluoride is also used for X-ray monochromator plates where its lattice spacing makes it the most useful analysis crystal.
2. Heat sink materials
3. UV transmission windows: Lithium fluoride is the material with the most extreme UV transmission of all and is used for special UV optics. Lithium fluoride transmits well into the VUV region at the hydrogen Lyman-alpha line (121nm) and beyond.
;
References
[1] H. Li, G. Richter, J. Maier, Reversible Formation and Decomposition of LiF Clusters Using Transition Metal Fluorides as Precursors and Their Application in Rechargeable Li Batteries, Advanced Materials, 2003, vol. 15, 736-739
[2] J. R. Cameron, F. Daniels, N. Johnson, G. Kenney, Radiation Dosimeter Utilizing the Thermoluminescence of Lithium Fluoride, Science, 1961, vol. 134, 333-334
[3] E. T. Kvamme, J. C. Earthman, D. B. Leviton, B. J. Frey, Lithium fluoride material properties as applied on the NIRCam instrument, Proc. SPIE 59,4, 2005
[4] Y. Kogure, H. Kaburaki, Y. Hiki, Low-Temperature Thermal Properties of Lithium Fluoride Containing Dislocations, Phonon Scattering in Condensed Matter, 1979, 267-270
[5] H. Naghib-zadeh, C. Glizky, I. D?rfel, T. Rabe, Low temperature sintering of barium titanate ceramics assisted by addition of lithium fluoride-containing sintering additives, Journal of the European Ceramic Society, 2010, vol. 30, 81-86
[6] M. W. Rosenthal, P. R. Kasten, R. B. Briggs, Molten-Salt Reactors – History, Status, and Potential, 1970, vol. 8, 107-117
[7] Fan, Y., Zhao, B., Zou, X., Zhao, W., Zhang, Y., Zhu, M., Zhang, H., Hong, Z., Cheng, X., Chen, P., Bai, Z., Shen, Y., & Tang, Y. (2026). Reactive lithium fluoride revitalizes bulk-interface Na-ion transport in all-solid-state PEO-based sodium batteries. Chemical Science, 13, 6619–6631. https://doi.org/10.1039/D5SC08784H ;

Spectrum Detail

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7789-24-4

Chemical Properties

Safety Data

Raw materials And Preparation Products

Raw materials

Hazard Information

Chemical Properties

Physical properties

Flammability and Explosibility

reaction suitability

Battery Materials

Purification Methods

Structure and conformation

Material Safety Data Sheet(MSDS)

Questions And Answer

Description

Uses

References

Spectrum Detail

Well-known Reagent Company Product Information

Supplier

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