Gadolinium(III) iodide
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-iodid.png) | |
| Identifiers | |
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3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.033.619 |
| EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| GdI3 | |
| Molar mass | 537.96 g/mol−1 |
| Appearance | yellow solid |
| Melting point | 926 °C[1] |
| Boiling point | 1340 °C[2] |
| Hazards | |
| GHS labelling: | |
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| Danger[1] | |
| H317, H360 | |
| P201, P280, P308+P313[1] | |
| Related compounds | |
Other anions |
Gadolinium(III) fluoride Gadolinium(III) chloride Gadolinium(III) bromide |
Other cations |
Europium(III) iodide Terbium(III) iodide Samarium(III) iodide |
Related compounds |
Gadolinium(II) iodide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Gadolinium(III) iodide is an iodide of gadolinium, with the chemical formula of GdI3. It is a yellow, highly hygroscopic solid with a bismuth(III) iodide-type crystal structure. In air, it quickly absorbs moisture and forms hydrates. The corresponding oxide iodide is also readily formed at elevated temperature.[2]
Gadolinium(III) iodide can be obtained by reacting gadolinium with iodine:[2]
- 2 Gd + 3 I2 → 2 GdI3
It can also be obtained by reacting gadolinium with mercury(II) iodide in a vacuum at 500 °C:[2]
- 2 Gd + 3 HgI2 → 2 GdI3 + 3 Hg
Gadolinium(III) iodide can be obtained by the reaction between gadolinium(III) oxide and hydroiodic acid, crystallizing into the hydrate form. The hydrate form can be heated with ammonium iodide to form the anhydrous form.[2][3]
- Gd2O3 + 6 HI → 2 GdI3 + 3 H2O