Yttrium(III) fluoride

Orthorhombic

Y, F

• Yttrium
• Yttrium (III ) fluoride

White solid

Fixed

4.0 g · cm -3

1150 ° C.

2230 ° C

Insoluble in water, soluble in concentrated mineral acids

Attention

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Yttrium is a chemical compound of yttrium selected from the group of the fluorides.

Production and representation

Yttrium fluoride may be represented by the reaction of fluorine with yttria or yttrium hydroxide and hydrofluoric acid.

Properties

Yttrium fluoride having a refractive index of 1.51 at 500 nm and is in the range of 193 nm to 14,000 nm (that is, from the UV to the IR range ) transparent.

By reduction with calcium may be recovered from yttrium pure yttrium.

Use

There is used as starting material for the preparation of pure yttrium or other yttrium compounds, and as a material for thin films, glasses and ceramic materials.

Other Yttriumfluoride

Yttrium (I ) fluoride, YF (CAS 13981-88-9 ) and yttrium (II ) fluoride, YF2 (CAS 13981-89-0 ) are extremely unstable and only known in the gas phase.