7789-24-4

Basic information

• Product Name: Lithium fluoride
• Synonyms: Lithium fluorure (FRENCH);Lithium fluoride (Li3F3);MTS-N;TLD 700;Lithium fluorure [French];Lithium fluoride (LiF);Fluorolithium;Carbonic acid,compounds,dilithium salt;TLD 100;Trilithium trifluoride;Lithium fluorure [French];PTL 710;Lithium fluorure;NTL 50;Lithium monofluoride;Lithium Fluoride, technical grade;Lithium Fluoride(Industrial grade);Lithium fluoride,industrial grade
• CAS NO: 7789-24-4
• Molecular Formula: FLi
• Molecular Weight: 25.9394032
• EINECS: 232-152-0
• Mol File: 7789-24-4.mol
• Article Data: 39

Chemical Properties

• Melting Point: 845℃
• Boiling Point: 1681 °C
• Flash Point: 1680°C
• Appearance: White powder
• Density: 2.64 g/mL at 25 °C(lit.)
• Water Solubility: 0.29 g/100 mL (20℃)
• CAS DataBase Reference: Lithium fluoride(CAS DataBase Reference)
• NIST Chemistry Reference: Lithium fluoride(7789-24-4)
• EPA Substance Registry System: Lithium fluoride(7789-24-4)

Safety Data

• Hazard Codes: T:Toxic
• Statements: R23/24/25:
• Safety Statements: S26:; S45:
• Hazardous Substances Data: 7789-24-4(Hazardous Substances Data)

Usage

General Description

Lithium fluoride is an inorganic compound with the formula LiF, primarily used in radiation detectors and optics. It is a colorless solid and appears as a white, crystalline substance. It has a melting point of 845 degrees Celsius, which is relatively high for a lithium compound. Lithium fluoride has low solubility in water, it only dissolves slightly. Despite being highly stable, it is considered more reactive than many other alkali halides due to lithium's low charge. Its second most significant property is extreme hardness, making it commonly used in specialized optics. Lithium fluoride can generate ions freely, which makes it useful in thermoluminescent dosimeters and heat-resistant purposes in nuclear reactors. It is also used in ceramics, glass, and welding flux.

InChI:InChI=1/FH.Li/h1H;/q;+1/p-1

Upstream product

• 75-45-6 Chlorodifluoromethane 
• 7439-93-2 lithium 
• 17341-24-1 lithium cation 
• 554-13-2 lithium carbonate 
• 7789-23-3 potassium fluoride 
• 7550-35-8 lithium bromide 
• 12436-25-8 sodium metavanadate 
• 10377-51-2 lithium iodide 
• 7681-49-4 sodium fluoride 
• 7664-39-3 hydrogen fluoride 
• 7787-71-5 bromine trifluoride 
• 7637-07-2 boron trifluoride 
• 1310-65-2 lithium hydroxide 
• 7440-44-0 pyrographite 

Downstream Products

• 70021-19-1 lithium-tris(pentafluorophenyl)fluoroborate 
• 259530-29-5 MoF(C₂₆H₂₄P₂)(C₇H₇)⁽¹⁺⁾*PF₆^(1-) = [MoF(C₂₆H₂₄P₂)(C₇H₇)]PF₆ 
• 409071-16-5 lithium difluoromono[1,2-oxalato^(2-)-O,O'] borate 
• 132645-81-9 (C₆H₂(CH₃)3)2B₂F₂ 

Relevant articles and documents

Stability of Li2CO3 in cathode of lithium ion battery and its influence on electrochemical performance

Lithium carbonate is an unavoidable impurity at the cathode side. It can react with LiPF6-based electrolyte and LiPF6 powder to produce LiF and CO2, although it presents excellent electrochemical inertness. Samples of Li2CO3-coated and LiF-coated LiNi0.8Co0.1Mn0.1O2 were prepared to compare their influence on a cathode's behavior. After 200 cycles at 1C, in contrast to 37.1% of capacity retention for the Li2CO3-coated material, the LiF-coated LiNi0.8Co0.1Mn0.1O2 retained 91.9% of its initial capacity, which is similar to the fresh sample. This demonstrates that decomposition of Li2CO3 can seriously deteriorate cyclic stability if this occurs during working.

YHO, an Air-Stable Ionic Hydride

Metal hydride oxides are an emerging field in solid-state research. While some lanthanide hydride oxides (LnHO) were known, YHO has only been found in thin films so far. Yttrium hydride oxide, YHO, can be synthesized as bulk samples by a reaction of Y2O3 with hydrides (YH3, CaH2), by a reaction of YH3 with CaO, or by a metathesis of YOF with LiH or NaH. X-ray and neutron powder diffraction reveal an anti-LiMgN type structure for YHO (Pnma, a = 7.5367(3) ?, b = 3.7578(2) ?, and c = 5.3249(3) ?) and YDO (Pnma, a = 7.5309(3) ?, b = 3.75349(13) ?, and c = 5.3192(2) ?); in other words, a distorted fluorite type with ordered hydride and oxide anions was observed. Bond lengths (average 2.267 ? (Y-O), 2.352 ? (Y-H), 2.363 ? (Y-D), >2.4 ? (H-H and D-D), >2.6 ? (H-O and D-O), and >2.8 ? (O-O)) and quantum-mechanical calculations on density functional theory level (band gap 2.8 eV) suggest yttrium hydride oxide to be a semiconductor and to have considerable ionic bonding character. Nonetheless, YHO exhibits a surprising stability in air. An in situ X-ray diffraction experiment shows that decomposition of YHO to Y2O3 starts at only above 500 K and is still not complete after 14 h of heating to a final temperature of 1000 K. YHO hydrolyzes in water very slowly. The inertness of YHO in air is very beneficial for its potential use as a functional material.

PREPARATION OF HIGHLY PURE LITHIUM AND SODIUM FLUORIDES USING SOLVENT EXTRACTION.

LiF and NaF can be purified by solvent extraction. The impurity concentrations in the purified NaF are 2. 5 ng g** minus **1 for chromium, 60 ng g** minus **1 for iron, 0. 03 ng g** minus **1 for cobalt, and 1. 5 ng g** minus **1 for copper. The concentra

Flux crystal growth, structure, magnetic and optical properties of a family of alkali uranium(IV) phosphates

A family of alkali uranium(IV) phosphates, AU2(PO4)3 (A = Li – Cs), was synthesized as single crystals by the reaction of US2 and (NH4)2HPO4 in the respective ACl (A = Li – Cs) flux contained in a sealed fused-silica tube at 850 °C, and as phase pure powders from a similar reaction using UF4 as the uranium source. AU2(PO4)3 (A = Li – Rb) crystallize in the NaTh2(PO4)3 (NTP) structure type with monoclinic space group C2/c and consist of a 3D structure that features a framework composed of edge- and corner-sharing polyhedra. The cesium analogue, CsU2(PO4)3, crystallizes in a different structure with space group P21/n that is related to the NaZr2(PO4)3 (NZP) structure type and consists of a framework composed of corner-sharing polyhedra. Two new alkali uranium phosphates, Li2U(PO4)2 and Cs4U4(P2O7)5, were also grown as single crystals at 700 °C. Li2U(PO4)2 was isolated in approximately 30% yield based on uranium. Li2U(PO4)2 crystallizes in space group P21/c exhibiting a layered structure while Cs4U4(P2O7)5, crystallizes in space group P21/n in a new structure type featuring a 3D framework. The magnetic susceptibilities and the field dependent magnetizations were measured for AU2(PO4)3 (A = Li, Na, K and Cs); all compounds exhibited negative Weiss temperatures with no obvious antiferromagnetic transition. Optical properties were measured by UV–vis and IR spectroscopy.

Thermal decomposition of lithium-inserted NbO2F

The thermal decomposition of lithium-inserted NbO2F was studied by differential scanning calorimetry. Samples of LixNbO2F (O ≤ x ≤ 1.8) were heated to 800 and 950 K. The thermograms revealed that decomposition started within the temperature range 640 - 780 K, followed by a second step at approximately 900 K. The products were characterized by X-ray powder diffraction and electron diffraction patterns and by high-resolution electron microscopy. The following phases were obtained at 800 K: LiF, NbO2F, the low pressure form of Nb3O7F, and lithium-enriched forms of P-Nb2O5, NbO2 and LiNbO3. At 950 K, NbO2F disappeared, and LiNb3O8 and the high pressure form of Nb3O7F coexisted with the other phases obtained at 800 K. The formation of structures built up of approximately hexagonally close-packed anion arrangements is discussed.

HF-Free Synthesis of Li2SiF6:Mn4+: A Red-Emitting Phosphor

Li2SiF6:Mn4+ was synthesized via a new HF-free synthesis route by a high-pressure/higherature doping experiment at 5.5 GPa and 750 °C. It is proven that the phosphor cannot be synthesized by the common wet-chemical precipitation route in aqueous HF. The sample was characterized by powder X-ray diffraction, EDX, and luminescence spectroscopy. At room temperature, Li2SiF6:Mn4+ exhibits seven emission lines with the strongest line at max 630 nm and a dominant wavelength of dom 618 nm. The CIE coordinates are 0.688 and 0.312 for x and y, respectively. The compound shows a luminous efficacy of radiation (LER) of 218 lm Wopt-1, which exceeds the LER of current state-of-the-art red LED phosphor K2SiF6:Mn4+ by 7% due to a blue-shift of the emission. It reveals excellent thermal quenching behavior up to 125 °C.