Thulium (III) chloride

Crystal structure
__ Tm 3+      __ Cl -
Space group	C 2 / m (No. 12)
General
Surname	Thulium (III) chloride
other names	Thulium trichloride
Ratio formula	TmCl 3
Brief description	light yellow powder
External identifiers / databases
CAS number 13537-18-3 1331-74-4 (hexahydrate) 10025-92-0 (heptahydrate) PubChem 61643 Wikidata Q424803
properties
Molar mass	275.29 g mol −1 (anhydrous) 383.39 g mol −1 (hexahydrate)
Physical state	firmly
density	4.34 g cm −3
Melting point	824 ° C
boiling point	1490 ° C
solubility	soluble in water
safety instructions
GHS labeling of hazardous substances Caution H and P phrases H: 315-319-335 P: 261-305 + 351 + 338
Toxicological data	4,294 mg kg −1 ( LD 50 ,  mouse ,  oral )
As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Thulium (III) chloride is a chemical compound from the group of chlorides .

Extraction and presentation

Thulium (III) chloride can be obtained by reacting thulium (III) oxide or thulium (III) carbonate and ammonium chloride.

${\displaystyle \mathrm {Tm_{2}O_{3}+6\ NH_{4}Cl\longrightarrow 2\ TmCl_{3}+6\ NH_{3}+2\ H_{2}O} }$

The hexahydrate is formed by the reaction of thulium with hydrochloric acid . This can be converted to the anhydrate form by reaction with thionyl chloride .

${\displaystyle \mathrm {2\ Tm+6\ HCl\longrightarrow 2\ TmCl_{3}+3\ H_{2}} }$

Thulium (III) chloride can also be synthesized directly from the elements thulium and chlorine .

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

properties

Thulium (III) chloride is a light yellow powder. Its hexahydrate is a light green hygroscopic solid. Both are soluble in water. Thulium (III) chloride has a monoclinic crystal structure with the space group C 2 / m (No. 12) corresponding to that of aluminum (III) chloride .

Individual evidence

1. ↑ ^{a b c d e} Jean D'Ans, Ellen Lax: Paperback for chemists and physicists . 2007, ISBN 978-3-540-60035-0 , pp. 780 ( limited preview in Google Book search).
2. ↑ ^{a b c d e} data sheet Thulium (III) chloride, anhydrous, powder, 99.9% trace metals basis from Sigma-Aldrich , accessed on April 30, 2012 ( PDF ).
3. ↑ ^{a b c d e} Georg Brauer (Ed.), With the collaboration of Marianne Baudler u. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume II, Ferdinand Enke, Stuttgart 1978, ISBN 3-432-87813-3 , p. 897.
4. ↑ Web elements: Thulium
5. ↑ Data sheet Thulium (III) chloride hexahydrate, 99.99% trace metals basis from Sigma-Aldrich , accessed on April 30, 2012 ( PDF ).