Thulium (II) chloride

Crystal structure
__ Tm 2+      __ Cl -
General
Surname	Thulium (II) chloride
other names	Thulium dichloride
Ratio formula	TmCl 2
Brief description	dark red solid
External identifiers / databases
CAS number 22852-11-5 Wikidata Q15726008
properties
Molar mass	239.84 g mol −1
Physical state	firmly
Melting point	718 ° C
safety instructions
GHS hazard labeling no classification available
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Thulium (II) chloride is an inorganic chemical compound of thulium from the group of chlorides .

Extraction and presentation

Thulium (II) chloride can be obtained by reducing thulium (III) chloride with thulium in a vacuum at 800 to 900 ° C.

${\displaystyle \mathrm {Tm+2\ TmCl_{3}\longrightarrow 3\ TmCl_{2}} }$

It can also be represented by the reaction of thulium with mercury (II) chloride .

${\displaystyle \mathrm {Tm+HgCl_{2}\longrightarrow TmCl_{2}+Hg} }$

properties

Thulium (II) chloride is a dark red solid that looks dark green as a powder. The connection is extremely hygroscopic and can only be stored and handled under carefully dried protective gas or in a high vacuum. In air or on contact with water, it changes into hydrates while absorbing moisture , but these are unstable and more or less quickly turn into oxide chlorides with evolution of hydrogen . The compound has a crystal structure of strontium iodide type.

Individual evidence

1. ↑ ^{a b c d e f} Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume I, Ferdinand Enke, Stuttgart 1975, ISBN 3-432-02328-6 , p. 1081.
2. ↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.