Tantalum pentafluoride

Tantalum pentafluoride

Colorless solid

Fixed

4.74 g · cm -3

96.8 ° C

230 ° C.

Decomposition in water

Risk

Template: Infobox chemical / molecular formula search available

Tantalum (V ) fluoride is an inorganic chemical compound of tantalum from the group of fluorides.

Production and representation

Tantalum (V ) fluoride can be obtained by reaction with hydrogen fluoride, tantalum (V ) chloride.

Also possible the appearance of the elements is at 300 ° C.

Or the reaction of the tantalum with tin (II ) fluoride.

Properties

Tantalum (V ) fluoride is a moisture-sensitive colorless solid which is in the form of highly refractive, deliquescent in air prisms. It dissolves in water to form Tantaloxidfluorid hiss. Smoking and concentrated nitric acid, it does not dissolve as violent as water. Cold concentrated sulfuric acid dissolves only small amounts of the compound with alkali hydroxides and ethers she reacts violently. Dry glass is only slowly attacked at room temperature, but at higher quickly. Tantalum (V) fluoride, has a monoclinic crystal structure with space group C2 / m. Such as molybdenum (V ) fluoride, and tungsten (V ) fluoride is tantalum (V ) fluoride tetrameric units [ MF4F2 / 2] 4 based on cubic dense spherical packing of the fluorine atoms.

Use

Tantalum (V ) fluoride is used in combination with hydrogen fluoride as catalyst and super acid.