Dysprosium(III) selenide

Dysprosium(III) selenide is one of the selenides of dysprosium, with the chemical formula of Dy₂Se₃.

Dysprosium(III) selenide

Identifiers
CAS Number	12020-04-1 Y
3D model (JSmol)	Interactive image
EC Number	234-652-4
PubChem CID	165975
CompTox Dashboard (EPA)	DTXSID00923265
InChI InChI=1S/2Dy.3Se/q2*+3;3*-2 Key: AXKRJHNJTNYZJO-UHFFFAOYSA-N
SMILES [Se-2].[Se-2].[Se-2].[Dy+3].[Dy+3]
Properties
Chemical formula	Dy2Se3
Molar mass	561.913 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Preparation

Dysprosium(III) selenide can be prepared by reacting dysprosium(III) oxide or dysprosium(III) chloride with hydrogen selenide:

Dy₂O₃ + 3 H₂Se → Dy₂Se₃ + 3 H₂O

2 DyCl₃ + 3 H₂Se → Dy₂Se₃ + 6 HCl

It can also be obtained by reacting the elements at high temperatures:

2 Dy + 3 Se → Dy₂Se₃

Properties

Dysprosium(III) selenide reacts with arsenic triselenide to obtain DyAsSe₃.

Dy₂Se₃ + As₂Se₃ → 2DyAsSe₃