Gallium(III) fluoride

• Galliumfluorid ( ambiguous )
• Galliumtrifluorid

• 7783-51-9
• 22886-66-4 (trihydrate )

Colorless odorless solid

Fixed

4.47 g · cm -3

800 ° C.

> 1000 ° C.

Very slightly soluble in water (24 mg · l-1 at 20 ° C)

Attention

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Gallium (III ) fluoride is a chemical compound of the gallium from the group of fluorides.

Production and representation

Gallium (III ) fluoride can be obtained by reacting gallium with hydrogen fluoride.

The production by thermolysis of Ammoniumfluorogallat in a fluorine gas flow is possible.

The trihydrate GaF3 · 3H2O can be gained (III ) oxide with hydrogen fluoride by reaction of gallium (III ) hydroxide or gallium.

Properties

Gallium (III ) fluoride is a colorless solid which is resistant to hot and cold water. In water, gallium (III ) fluoride (as opposed to its trihydrate) very slightly soluble. It can be sublimed without decomposition in a protective nitrogen atmosphere above 800 ° C. By dehydration of the trihydrate can be prepared either in air or under vacuum, yet in a fluorine gas stream oxide free gallium (III ) fluoride. Gallium (III ) fluoride, aluminum fluoride has a polymer similar to the crystal structure of a distorted rhenium (VI) oxide similar structure. It forms such as alumina complex compounds.

Use

Gallium (III ) fluoride is used for the preparation of Fluorgallatgläsern for optical purposes.