Hafnium tetrachloride

Hafnium

White solid

Fixed

315 ° C ( sublimation)

1 hPa (190 ° C)

Reacts with water

Risk

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Hafnium ( IV) chloride is an inorganic chemical compound of hafnium from the group of chlorides.

Production and representation

Hafnium ( IV) chloride can be obtained by chlorination of hafnium with chlorine at 320 ° C.

It can also be obtained by reaction of hafnium ( II) hydride with hydrogen chloride.

Properties

Hafnium ( IV ) chloride is a white crystalline powder, which forms hydrochloric acid mists in moist air and is decomposed by lively water, the Hafniumoxidchlorid arises.

It sublimes at 315 ° C and melts at 433 ° C. under pressure The crystal structure of the compound is monoclinic with space group P2 / c and consists of slightly distorted octahedra form HfCl6 which extended cis -linked HfCl2Cl4/2-Ketten.

Use

Hafnium ( IV ) chloride is used as the starting compound for the chemical vapor deposition of hafnium carbide.