Barium hexaboride

Barium hexaboride
Names
	IUPAC name Barium boride
	Other names Barium hexaboride
Identifiers
CAS Number	12046-08-1;
ECHA InfoCard	100.031.774
PubChem CID	6336903;
CompTox Dashboard (EPA)	DTXSID501014267 ;
	InChI InChI=1S/6B.Ba Key: DBNPLCUZNLSUCT-UHFFFAOYSA-N;
Properties
Chemical formula	BaB6
Molar mass	202.193 g/mol
Appearance	Black, cubic substance
Density	4.36 g/cm3
Melting point	2,270 °C (4,120 °F; 2,540 K)
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Barium hexaboride is a hard material with a high melting point.^[1] It can be formed by passing a barium vapour at >750 °C over boron crystals:

Ba + 6B → BaB₆

However, it can also be formed by reacting barium chloride with boron in two stages: firstly at 900 °C for 30 minutes and then at 1,500 °C for 60 minutes.

Potential applications

Barium hexaboride has been considered as a candidate for use in hot-cathode electron guns.

References

^ Massidda, S.; Monnier, R.; Stoll, E. (October 2000). "Electronic structure of barium hexaboride". The European Physical Journal B. 17 (4): 645–649. Bibcode:2000EPJB...17..645M. doi:10.1007/s100510070103. ISSN 1434-6028.

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[1] Massidda, S.; Monnier, R.; Stoll, E. (October 2000). "Electronic structure of barium hexaboride". The European Physical Journal B. 17 (4): 645–649. Bibcode:2000EPJB...17..645M. doi:10.1007/s100510070103. ISSN 1434-6028.

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