Yttrium chloride, YCl₃

For the preparation and properties of the anhydrous salt. It is a hygroscopic, colourless, crystalline solid, perceptibly volatile at a bright red heat.

The hexahydrate, YCl₃.6H₂O, crystallises in colourless, monoclinic prisms and melts at 156° to 160°. The monohydrate, YCl₃.H₂O, is also known.

Yttrium aurichloride, YCl₃.2AuCl₃.16H₂O (Cleve), and yttrium mercuric chloride, YClS.3HgCl₂.9H₂O, are known.