Caesium selenide

Caesium selenide
	; Cs+: __ Se2-: __
Names
	Other names Cesium selenide;
Identifiers
CAS Number	31052-46-7 ;
3D model (JSmol)	Interactive image;
ChemSpider	148025;
ECHA InfoCard	100.045.848
EC Number	250-448-8;
PubChem CID	169244;
CompTox Dashboard (EPA)	DTXSID70953155 ;
	InChI InChI=1S/2Cs.Se/q2*+1;-2 Key: KUBAIENASCDSDJ-UHFFFAOYSA-N;
	SMILES [Se-2].[Cs+].[Cs+];
Properties
Chemical formula	Cs2Se
Molar mass	344.771 g/mol
Appearance	colourless, highly hygroscopic crystals
Density	4.33 g·cm−3
Solubility in water	hydrolyses
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H331, H373, H410
Related compounds
Other anions	Caesium oxide; Caesium sulfide; Caesium telluride; Caesium polonide
Other cations	Lithium selenide; Sodium selenide; Potassium selenide; Rubidium selenide
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Caesium selenide is an inorganic compound with the chemical formula Cs₂Se. It has an inverse fluorite structure, with space group $Fm{\bar {3}}m$ . There are 4 units per unit cell, and the other selenides from the same group are similar.