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Terbium(III) iodide
Chemical compound From Wikipedia, the free encyclopedia
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Terbium(III) iodide (TbI3) is an inorganic chemical compound.
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Preparation
Terbium(III) iodide can be produced by reacting terbium and iodine.[2]
- 2 Tb + 3 I2 → 2 TbI3
Terbium iodide hydrate can be crystallized from solution by reacting hydriodic acid with terbium, terbium(III) oxide, terbium hydroxide or terbium carbonate:
- 2 Tb + 6 HI → 2 TbI3 + 3 H2↑
- Tb2O3 + 6 HI → 2 TbI3 + 3 H2O
- 2 Tb(OH)3 + 6 HI → 2 TbI3 + 3 H2O
- Tb2(CO3)3 + 6 HI → 2 TbI3 + 3 H2O + 3 CO2
An alternative method is reacting terbium and mercury(II) iodide at 500 °C.[3]
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Structure
Terbium(III) iodide adopts the bismuth(III) iodide (BiI3) crystal structure type,[4][3] with octahedral coordination of each Tb3+ ion by 6 iodide ions.[5]
References
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