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_chloride_hexahydrate.jpg) | |||
| Names | |||
|---|---|---|---|
| Other names terbium trichloride | |||
| Identifiers | |||
3D model (JSmol) | |||
| ECHA InfoCard | 100.030.108 | ||
| EC Number |
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| UNII | |||
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| Properties | |||
| TbCl3 | |||
| Molar mass | 265.2834 g/mol | ||
| Appearance | white powder | ||
| Density | 4.35 g/cm3, solid | ||
| Melting point | 558 °C (1,036 °F; 831 K) | ||
| Boiling point | 180 to 200 °C (356 to 392 °F; 453 to 473 K) (inHCl gas atmosphere) | ||
| soluble | |||
| Structure | |||
| hexagonal (UCl3 type),hP8 | |||
| P63/m, No. 176 | |||
| Tricapped trigonal prismatic (nine-coordinate) | |||
| Hazards | |||
| GHS labelling:[1] | |||
 | |||
| Warning | |||
| H315,H319 | |||
| P302+P352,P305+P351+P338 | |||
| Related compounds | |||
Otheranions | Terbium(III) oxide | ||
Othercations | Gadolinium(III) chloride Dysprosium(III) chloride | ||
Except where otherwise noted, data are given for materials in theirstandard state (at 25 °C [77 °F], 100 kPa). | |||
Terbium(III) chloride (TbCl3) is achemical compound. In the solid state TbCl3 has theYCl3 layer structure.[2] Terbium(III) chloride frequently forms a hexahydrate.
The hexahydrate of terbium(III) chloride can be obtained by the reaction ofterbium(III) oxide andhydrochloric acid:[3]
It can also be obtained by direct reaction of the elements:[4]
Terbium(III) chloride is a white,hygroscopic powder.[5] It crystallizes in anorthorhombicplutonium(III) bromide crystal structure withspace group Cmcm (No. 63).[6][7] It can form a complex Tb(gly)3Cl3·3H2O with glycine.[8]
The hexahydrate plays an important role as an activator of greenphosphors in color TV tubes and is also used in specialty lasers and as adopant insolid-state devices.[9]
Terbium(III) chloride causeshyperemia of theiris.[10]Conditions/substances to avoid are:heat,acids and acid fumes.
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