Barium hexaboride

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Barium hexaboride
Names
IUPAC name
Barium boride
Other names
Barium hexaboride
Identifiers
ECHA InfoCard 100.031.774 Edit this at Wikidata
  • InChI=1S/6B.Ba
    Key: DBNPLCUZNLSUCT-UHFFFAOYSA-N
Properties
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).

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

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