Potassium selenide

Potassium selenide (K₂Se) is an inorganic compound formed from selenium and potassium.

Potassium selenide

Names
IUPAC name Potassium selenide
Other names Dipotassium selenide
Identifiers
CAS Number	1312-74-9 N
3D model (JSmol)	Interactive image
ChemSpider	66596
ECHA InfoCard	100.013.817
EC Number	215-198-6
PubChem CID	73968
UNII	5B5516VCNR
CompTox Dashboard (EPA)	DTXSID6061658
InChI InChI=1S/2K.Se/q2*+1;-2 Key: VZZSRKCQPCSMRS-UHFFFAOYSA-N
SMILES [K+].[K+].[Se-2]
Properties
Chemical formula	K2Se
Molar mass	157.16
Appearance	clearish wet crystal[1]
Density	2.29 g/cm3[2]
Melting point	800 °C (1,470 °F; 1,070 K)[3]
Solubility in water	reacts
Structure
Crystal structure	cubic: antifluorite
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	toxic
GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H331, H373, H410
Precautionary statements	P260, P262, P264, P270, P271, P273, P280, P284, P301+P310, P304+P340, P310, P314, P320, P321, P330, P361, P363, P391, P403+P233, P405, P501
Related compounds
Other anions	Potassium oxide Potassium sulfide Potassium telluride Potassium polonide
Other cations	Lithium selenide Sodium selenide Rubidium selenide Caesium selenide
Related compounds	Potassium selenate
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Production

It can be produced by the reaction of selenium and potassium. If the two are combined in liquid ammonia, the purity is higher.

Crystal structure

Potassium selenide has a cubic, antifluorite crystal structure.