Erbium iodate

Erbium iodate is an inorganic compound with the chemical formula Er(IO₃)₃.

Erbium iodate

Identifiers
CAS Number	14723-96-7 anhydrous Y 54172-09-7 dihydrate Y
3D model (JSmol)	Interactive image
CompTox Dashboard (EPA)	DTXSID70163631
InChI InChI=1S/3HIO3.Er/c3*2-1(3)4;/h3*(H,2,3,4);/q;;;+3/p-3 Key: SJSQSCFANAWQCT-UHFFFAOYSA-K
SMILES [Er+3].O=I(=O)[O-].O=I(=O)[O-].O=I(=O)[O-]
Properties
Chemical formula	Er(IO3)3
Molar mass	691.97
Appearance	pale pink[1] or orange crystals (anhydrous)[2] pink[2] or red crystals (dihydrate)[3]
Density	4.956 g·cm−3 (20 °C, dihydrate)[3]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Preparation

Erbium iodate can be obtained by reacting erbium periodate and periodic acid in water at 160 °C. The reaction will produce anhydrous and dihydrate crystals.^[2]

Properties

Erbium iodate dihydrate is stable below 266 °C, loses two molecules of water at 289 °C, and decomposes at 589 °C to generate iodine and release oxygen.^[3]