3D model (JSmol)
CompTox Dashboard (EPA)
|Molar mass||308.03 g/mol|
|Melting point||1,110 °C (2,030 °F; 1,380 K)|
|Boiling point||1,680 °C (3,060 °F; 1,950 K)|
Refractive index (nD)
|C12/c1, No. 15|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
Thorium(IV) fluoride (ThF4) is an inorganic chemical compound. It is a white hygroscopic powder which can be produced by reacting thorium with fluorine gas. At temperatures above 500 °C, it reacts with atmospheric moisture to produce ThOF2.
Despite its (mild) radioactivity, thorium fluoride is used as an antireflection material in multilayered optical coatings. It has excellent optical transparency in the range 0.35-12 µm, and its radiation is primarily due to alpha particles, which can be easily stopped by a thin cover layer of another material.