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Reference.org
Gadolinium(III) iodide
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<p>Gadolinium(III) iodide is an <a href="/facts/Iodide/JyVRGWMX">iodide</a> of <a href="/facts/Gadolinium/eLYUeScu">gadolinium</a>, with the <a href="/facts/Chemical_formula/hghUtthl">chemical formula</a> of GdI3. It is a yellow, highly <a href="/facts/Hygroscopic/1NBGewXv">hygroscopic</a> solid with a <a href="/facts/Bismuth(III)_iodide/qap1BoQB">bismuth(III) iodide</a>-type <a href="/facts/Crystal_structure/bJ4bCeHd">crystal structure</a>. In <a href="/facts/Air/hQ95Jznz">air</a>, it quickly absorbs moisture and forms <a href="/facts/Hydrate/dev82l69">hydrates</a>. The corresponding oxide iodide is also readily formed at elevated temperature. </p>