Product Name
Lithium fluoride
Category
Electrolytes; Organic Solar Cell (OPV) Materials; Substrates and Electrode Materials
IUPAC Name
lithium;fluoride
Canonical SMILES
[Li+].[F-]
InChI
InChI=1S/FH.Li/h1H;/q;+1/p-1
InChI Key
PQXKHYXIUOZZFA-UHFFFAOYSA-M
Solubility
0.134 g/100 g water at 25 °C; soluble in acid;0.27 G SOL IN 100 ML WATER @ 18 °C; INSOL IN ALCOHOL; SOL IN HYDROGEN FLUORIDE
Application
Lithium fluoride serves a versatile role in various applications due to its unique properties. Unlike other lithium halides, it is not hygroscopic and remains stable when exposed to air, which makes it particularly valuable in environments sensitive to moisture. Its low solubility compared to other alkali metal fluorides positions it closer to the alkaline earth fluorides, a feature that can be manipulated with the addition of hydrofluoric acid, converting its fluoride ions to bifluoride ions and increasing solubility. This compound plays a crucial role in the glass lining soldering process as a cosolvent and enhances the efficiency of aluminum and rare earth electrolysis. In the realm of technology, lithium fluoride's wide band gap and UV transparency make it suitable for specialized ultraviolet optics and as a crystal in X-ray spectrometry. It is essential in monitoring ionizing radiation exposure through its application in thermoluminescent dosimeters. Notably, in nuclear industries, it combines with beryllium fluoride to create a base solvent in molten-salt reactor experiments. Moreover, it enhances electron injection in polymer and organic light-emitting diodes, showcasing its importance in advancing display and lighting technologies.
Color/Form
Cubic crystals (NaCl lattice) or white fluffy powder;Fine white powder
Covalently-Bonded Unit Count
2
EC Number
232-152-0;241-438-4;238-958-9
MeSH Entry Terms
GR 200-A;GR-200-A;GR200-A;lithium fluoride;lithium fluoride, 6Li-labeled;lithium fluoride, 7Li-labeled
Monoisotopic Mass
26.014407g/mol
Other Experimental
Volatilizes at 1100-1200 °C; with hydrofluoric acid it forms lithium bifluoride, LiHF2; with lithium hydroxide it forms a double salt LiF.LiOH;Does not react with water at red heat;Standard molar enthalpy of formation at 298.15 K: -616.0 kJ/mol; molar heat capacity at constant pressure and 298.15 K: 41.6 J/mol K;Enthalpy of fusion: 27.09 kJ/mol
Refractive Index
INDEX OF REFRACTION: 1.3915
Vapor Pressure
1 mm Hg at 1047 °C