Skip to main content

Lithium fluoride

ADVERTISEMENT
Identification
Molecular formula
LiF
CAS number
7789-24-4
IUPAC name
lithium;fluoride
State
State

At room temperature, lithium fluoride is found in a solid state. It forms crystalline structures that are robust and stable under normal environmental conditions.

Melting point (Celsius)
845.00
Melting point (Kelvin)
1 118.00
Boiling point (Celsius)
1 676.00
Boiling point (Kelvin)
1 949.00
General information
Molecular weight
25.94g/mol
Molar mass
25.9390g/mol
Density
2.6350g/cm3
Appearence

Lithium fluoride is a white, crystalline solid. It occurs in the form of cubic crystals similar to rock salt, with a structure that is typical of alkali halides. Under magnification, it can be seen that the crystals have a distinct, sharp-edged appearance.

Comment on solubility

Solubility of Lithium Fluoride

Lithium fluoride (LiF) is an ionic compound known for its relatively low solubility in water. Understanding the solubility of LiF provides insight into its practical applications and behavior in various environments.

Key Points on Solubility:

  • Water Solubility: Lithium fluoride has a low solubility of approximately 0.12 g per 100 mL of water at room temperature.
  • Influence of Temperature: The solubility of LiF increases slightly with temperature, which is common for many ionic compounds.
  • Solvent Effects: It is *much more soluble in polar solvents* due to the strong ion-dipole interactions present.
  • Comparative Solubility: Compared to other lithium compounds, LiF has a lower solubility, such as lithium chloride (LiCl), which is very soluble in water.

In summary, while lithium fluoride displays some solubility in water, it is considered to be sparingly soluble. As a general guideline, ionic compounds with high lattice energies, like LiF, typically exhibit lower solubility in water. This characteristic is important to note for applications involving ionic reactions and for understanding the behavior of lithium salts in aquatic systems.

Interesting facts

Interesting Facts About Lithium Fluoride

Lithium fluoride is an intriguing chemical compound with several unique properties and applications. Here are some key points that make it noteworthy:

  • Ion Conductivity: Lithium fluoride is known for its excellent ionic conductivity. This property makes it a valuable material in various applications, such as solid-state batteries.
  • Nuclear Applications: In the realm of nuclear chemistry, lithium fluoride is used as a moderator and coolant in fusion reactors. Its ability to absorb neutrons is particularly beneficial in this context.
  • Fluoride Ion Source: This compound serves as a source of fluoride ions in various industrial processes, including the production of aluminum and certain fluorine-containing compounds.
  • Transparent to Infrared: Interestingly, lithium fluoride is transparent to infrared radiation, making it useful in optical applications such as lenses and windows in infrared systems.
  • Natural Occurrence: Lithium fluoride occurs naturally as a rare mineral known as "spodumene," often found in granite pegmatites.

Given these facts, lithium fluoride not only plays a vital role in modern technology and industry but also showcases the diverse applications and features of chemical compounds. It truly exemplifies how a simple compound can have far-reaching implications in both science and technology.

In the words of a well-known chemist, "The study of compounds like lithium fluoride reminds us that the smallest elements can lead to the most profound advancements."