Thulium(III) chloride

Thulium(III) chloride
IUPAC name Thulium(III) chloride
Other names Thulium chloride, thulium trichloride
Identifiers
CAS number	13537-18-3
PubChem	24867527
RTECS number	XP0525000
Properties
Molecular formula	TmCl3
Molar mass	275.292 g/mol
Appearance	yellow crystals
Density	3.98 g/cm³
Melting point	824°C
Boiling point	1490°C[1]
Solubility in water	heptahydrate: very soluble
Solubility	heptahydrate: very soluble in ethanol[2]
Structure
Crystal structure	Monoclinic, mS16
Space group	C12/m1, No. 12
Coordination geometry	6[1]
Thermochemistry
Std enthalpy of formation ΔfHo298	966.6 kJ/mol[3]
Hazards
S-phrases	S26, S36[4]
Main hazards	Xi (Irritant)
Related compounds
Other anions	Thulium(III) oxide
Other cations	Erbium(III) chloride Ytterbium(III) chloride Thulium(II) chloride
Y chloride (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Thulium(III) chloride or thulium trichloride is the chemical compound composed of thulium and chlorine with the formula TmCl₃. It forms yellow crystals. Thulium(III) chloride has the YCl₃ (AlCl₃) layer structure with octahedral thulium ions.^[5]

Reactions

The hydrated form of thulium(III) chloride can be obtained by adding thulium(III) oxide to concentrated hydrochloric acid^[2]. Thulium(III) chloride reacts with strong bases to make thulium(III) oxide.

References

1. ^ ^{a b} "Chemistry: Periodic Table: Thulium: compound data (thulium (III) chloride)". WebElements. http://202.114.88.54/g/web18/wangluo/webelements/webelements/compounds/text/tm/cl3tm1-13537183.html. Retrieved 2008-06-27. 
2. ^ ^{a b} Spencer, James F. (1919). The Metals of the Rare Earths. New York: Longmans, Green, and Co. pp. 152. http://books.google.com/?id=W2zxN_FLQm8C&pg=PA152. Retrieved 2008-06-27 
3. ^ Perry, Dale L.; Phillips, Sidney L. (1995). Handbook of Inorganic Compounds. CRC Press. pp. 512. ISBN 0849386713. http://books.google.com/?id=kTnxSi2B2FcC&pg=PT1017. Retrieved 2008-06-27 
4. ^ "439649 Thulium(III) chloride anhydrous, powder, 99.99% trace metals basis". Sigma-Aldrich. https://www.sigmaaldrich.com/catalog/search/ProductDetail/ALDRICH/439649. Retrieved 2008-06-27. 
5. ^ Wells A.F. (1984) Structural Inorganic Chemistry 5th edition Oxford Science Publications ISBN 0-19-855370-6