Yttrium oxyfluoride

Yttrium oxyfluoride is an inorganic chemical compound with the formula YOF. Under normal conditions, the compound is a colorless solid.

Synthesis

Yttrium oxyfluoride may be formed in the decomposition of crystalline hydrate of yttrium fluoride upon heating to 900 °C in a vacuum:

${\displaystyle {\mathsf {2YF_{3}\cdot 1/2H_{2}O\ {\xrightarrow {\tau ,900^{o}C}}\ YOF+YF_{3}+2HF}}}$

Yttrium oxyfluoride can also be made by hydrolysis of yttrium fluoride with superheated steam at 800 °C:

${\displaystyle {\mathsf {2YF_{3}+H_{2}O\ {\xrightarrow {800^{o}C}}\ YOF+2HF}}}$

Physical properties

Yttrium oxyfluoride forms colorless crystals of tetragonal crystal system; its cell parameters are: a = 0.3910 nm, c = 0.5431 nm. According to hexagonal crystal family, the cell parameters are: a = 0.38727 nm, c = 1.897 nm, Z = 6.

Applications

Stable yttrium oxyfluoride material is used for inner walls of plasma process equipment.

References

1. Lanthanum oxyfluoride
2. Yttrium(III) fluoride
3. List of inorganic compounds
4. Actinium
5. Optical fiber
6. Toru H. Okabe
7. Iodine
8. Fluorine
9. Bohrium
10. Neptunium
11. Chlorine
12. Aluminium fluoride
13. Xenon
14. Tantalum
15. Robert D. Shannon
16. List of minerals recognized by the International Mineralogical Association (K)
17. Potassium fluorosilicate
18. Ruthenium
19. Selenite fluoride