| Names | |
|---|---|
| IUPAC name Barium boride | |
| Other names Barium hexaboride | |
| Identifiers | |
| CAS Number | |
| ECHA InfoCard | 100.031.774 
|
| PubChem CID | |
| CompTox Dashboard (EPA) | |
InChI
| |
| Properties | |
| Chemical formula | BaB6 |
| Molar mass | 202.193 g/mol |
| Appearance | Black, cubic substance |
| Density | 4.36 g/cm |
| 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 , 100 kPa). Infobox references | |
Barium hexaboride is a hard material with a high melting point. 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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