 | |
| Names | |
|---|---|
| IUPAC name Thulium(III) chloride | |
| Other names Thulium chloride, thulium trichloride | |
| Identifiers | |
3D model (JSmol) | |
| ChemSpider | |
| ECHA InfoCard | 100.033.535 |
| EC Number |
|
| RTECS number |
|
| UNII | |
| |
| |
| Properties | |
| TmCl3 | |
| Molar mass | 275.292 g/mol |
| Appearance | yellow crystals |
| Density | 3.98 g/cm3 |
| Melting point | 824 °C (1,515 °F; 1,097 K) |
| Boiling point | 1,490 °C (2,710 °F; 1,760 K) |
| heptahydrate: very soluble | |
| Solubility | heptahydrate: very soluble inethanol[1] |
| Structure | |
| Monoclinic,mS16 | |
| C12/m1, No. 12 | |
| 6[2] | |
| Thermochemistry | |
Std enthalpy of formation(ΔfH⦵298) | −966.6 kJ/mol[3] |
| Hazards | |
| Occupational safety and health (OHS/OSH): | |
Main hazards | Irritant |
| GHS labelling:[4] | |
 | |
| Warning | |
| H315,H319,H335 | |
| P261,P264,P271,P280,P302+P352,P304+P340,P305+P351+P338,P312,P332+P313,P337+P313,P362,P403+P233,P405,P501 | |
| Related compounds | |
Otheranions | Thulium(III) oxide |
Othercations | Erbium(III) chloride Ytterbium(III) chloride Thulium(II) chloride |
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |
Thulium(III) chloride orthulium trichloride is as an inorganic salt composed ofthulium andchlorine with theformula TmCl3. It forms yellow crystals. Thulium(III) chloride has theYCl3 (AlCl3) layer structure with octahedral thulium ions.[5] It has been used as a starting material for some exoticnanostructures prepared for NIRphotocatalysis.[6][7]
Thulium(III) chloride can be obtained by reactingthulium(III) oxide or thulium(III) carbonate andammonium chloride:[8]
Thehexahydrate of thulium(III) chloride can be obtained by addingthulium(III) oxide to concentratedhydrochloric acid.[1][8]
Thulium(III) chloride can also be obtained by directly reacting thulium and chlorine:[9]
Thulium(III) chloride is a light yellow powder. Its hexahydrate is a light green hygroscopic solid.[6] Both are soluble in water.[10] Thulium(III) chloride has amonoclinic crystal structure with thespace group C2/m (No. 12) corresponding to that of aluminum(III) chloride.[10][8]
Thulium(III) chloride reacts with strongbases to make thulium(III) oxide.
