Barium selenide

Barium selenide is an inorganic compound, with the chemical formula of BaSe. It is a white solid although typically samples are colored owing to the effects of air oxidation.^[3]

Barium selenide

Identifiers
CAS Number	1304-39-8 Y
3D model (JSmol)	Interactive image
ChemSpider	8010098
ECHA InfoCard	100.013.755
EC Number	215-130-5
PubChem CID	9834377
UNII	42Z7S6FJNV
CompTox Dashboard (EPA)	DTXSID7061649
InChI InChI=1S/Ba.Se/q+2;-2 Key: RJWLRCHYHHXJLX-UHFFFAOYSA-N
SMILES [Se-2].[Ba+2]
Properties
Chemical formula	BaSe
Molar mass	216.298 g·mol−1
Appearance	white solid
Structure[1]
Crystal structure	NaCl type (cubic)
Space group	Fm3m (No. 225)
Lattice constant	a = 662.9 pm
Formula units (Z)	4
Hazards
GHS labelling:[2]
Pictograms
Signal word	Danger
Hazard statements	H301, H331, H373, H410
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

BaSe has the lowest energy band gap among alkaline earth chalcogenides.^[4]

Preparation

Barium selenide can be obtained by the reduction of barium selenate in hydrogen flow:.^[3][5]

BaSeO₄ + 4 H₂ → BaSe + 4 H₂O

It can also be obtained by reacting selenium with barium carbonate or barium oxide at high temperature:^{[citation needed]}

2 BaCO₃ + 5 Se → 2 BaSe + 3 SeO₂ + CO₂

Related compounds

Barium can also forms a series of polyselenide compounds, such as Ba₂Se₃, BaSe₂ and BaSe₃.^[1]