Gadolinium diiodide

Gadolinium diiodide
Identifiers
CAS Number	13814-72-7 ;
3D model (JSmol)	Interactive image;
PubChem CID	157871709;
	InChI InChI=1S/Gd.2HI/h;2*1H/q+2;;/p-2 Key: DOUOICPRZGCJLL-UHFFFAOYSA-L;
	SMILES [I-].[I-].[Gd+2];
Properties
Chemical formula	GdI2
Molar mass	411.06 g·mol−1
Appearance	bronze solid
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Gadolinium diiodide is an inorganic compound, with the chemical formula of GdI₂. It is an electride, with the ionic formula of Gd³⁺(I⁻)₂e⁻,^[2] and therefore not a true gadolinium(II) compound. It is ferromagnetic at 276 K with a saturation magnetization of 7.3 B; it exhibits a large negative magnetoresistance (~70%) at 7 T near room temperature.^[3] It can be obtained by reacting gadolinium and gadolinium(III) iodide at a high temperature:^[4]

Gd + 2 GdI₃ → 3 GdI₂

Quick facts Identifiers, Properties ...

It can react with hydrogen at high temperature (800 °C) to obtain gadolinium hydrogen iodide (GdI₂H_0.97^[5]).^[6]

References