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⁻, 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. It can be obtained by reacting gadolinium and gadolinium(III) iodide at a high temperature:

Gd + 2 GdI₃ → 3 GdI₂

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

Identifiers

CAS Number	13814-72-7^Y
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