Ytterbium(III) iodide
Chemical compound
From Wikipedia, the free encyclopedia
Ytterbium(III) iodide is one of ytterbium's iodides, with the chemical formula of YbI3.
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| Names | |
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| Other names
Ytterbium triiodide Ytterbium iodide | |
| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
| ECHA InfoCard | 100.034.053 |
| EC Number |
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PubChem CID |
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CompTox Dashboard (EPA) |
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| Properties | |
| YbI3 | |
| Molar mass | 553.758 g·mol−1 |
| Appearance | yellow crystals[1] |
| Melting point | 700 °C (1,292 °F; 973 K) decomposes[1] |
| soluble[1] | |
| Hazards | |
| GHS labelling:[2] | |
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| Warning | |
| H315, H319, H335 | |
| P261, P264, P264+P265, P271, P280, P302+P352, P304+P340, P305+P351+P338, P319, P321, P332+P317, P337+P317, P362+P364, P403+P233, P405, P501 | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation
Ytterbium(III) iodide can be prepared by reacting metallic ytterbium with iodine at 500°C with a 30 atm pressure:[3]
- 2 Yb + 3 I2 → 2 YbI3
Ytterbium(III) oxide, ytterbium(III) hydroxide or ytterbium(III) carbonate can react with hydroiodic acid to obtain ytterbium(III) iodide in aqueous solution:
- Yb2O3 + 6 HI → 2 YbI3 + 3 H2O
- Yb(OH)3 + 3 HI → YbI3 + 3 H2O
- Yb2(CO3)3 + 6 HI → 2 YbI3 + 3 H2O + 3 CO2
The ytterbium(III) iodide hydrate crystallized from the solution can be heated with ammonium iodide to obtain the anhydrous form.[4]
Reactions
Ytterbium(III) iodide decomposes to ytterbium(II) iodide upon heating:[5]
- 2 YbI3 → 2 YbI2 + I2