Identifiers | |
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3D model (JSmol)
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Properties | |
FOY | |
Molar mass | 123.903 g·mol−1 |
Appearance | white powder |
Density | 5.18 g/cm3 |
Structure | |
tetragonal | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Yttrium oxyfluoride is an inorganic chemical compound with the formula YOF.[1] Under normal conditions, the compound is a colorless solid.[2]
Yttrium oxyfluoride may be formed in the decomposition of crystalline hydrate of yttrium fluoride upon heating to 900 °C in a vacuum:
Yttrium oxyfluoride can also be made by hydrolysis of yttrium fluoride with superheated steam at 800 °C:
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.
Stable yttrium oxyfluoride material is used for inner walls of plasma process equipment.[3][4]