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| Names | |
|---|---|
| IUPAC name
Rhenium diboride
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| Identifiers | |
3D model (JSmol)
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| EC Number |
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PubChem CID
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| Properties | |
| ReB2 | |
| Molar mass | 207.83 g/mol |
| Appearance | black powder |
| Density | 12.7 g/cm3 |
| Melting point | 2,400 °C (4,350 °F; 2,670 K)[1] |
| none | |
| Structure | |
| Hexagonal, Space group P63/mmc. | |
| Hazards | |
| GHS labelling: | |
 [2]
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| Warning[2] | |
| H315, H319, H335[2] | |
| P261, P280, P304+P340, P305+P351+P338, P405, P501[2] | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Rhenium diboride (ReB2) is a synthetic high-hardness material that was first synthesized in 1962.[3][4] The compound is formed from a mixture of rhenium, noted for its resistance to high pressure, and boron, which forms short, strong covalent bonds with rhenium. It has regained popularity in recent times in hopes of finding a material that possesses hardness comparable to that of diamond.[5]
Unlike other high-hardness synthetic materials, such as the c-BN, rhenium diboride can be synthesized at ambient pressure,[4] potentially simplifying a mass production. However, the high cost of rhenium and commercial availability of alternatives such as polycrystalline c-BN, make a prospect of large-scale applications less likely.[4]
- ^ Gaidar', L. M.; Zhilkin, V. Z. (1968). "Forward slip in the rolling of strip from metal powders". Soviet Powder Metallurgy and Metal Ceramics. 7 (4): 258. doi:10.1007/BF00775787. S2CID 135565681.
- ^ a b c d "Rhenium Diboride". American Elements. Retrieved 2018-08-02.
- ^ La Placa, S. J.; Post, B. (1962). "The crystal structure of rhenium diboride". Acta Crystallographica. 15 (2): 97. Bibcode:1962AcCry..15...97L. doi:10.1107/S0365110X62000298.
- ^ a b c Dubrovinskaia, Natalia; Dubrovinsky, Leonid; Solozhenko, Vladimir L. (2007-12-07). "Comment on "Synthesis of Ultra-Incompressible Superhard Rhenium Diboride at Ambient Pressure"". Science. 318 (5856): 1550. Bibcode:2007Sci...318.1550D. doi:10.1126/science.1147650. ISSN 0036-8075. OCLC 264200699. PMID 18063772. S2CID 1640087. Retrieved 2024-01-27.
- ^ Chung, Hsiu-Ying; et al. (April 20, 2007). "Synthesis of Ultra-Incompressible Superhard Rhenium Diboride at Ambient Pressure". Science. 316 (5823): 436–9. Bibcode:2007Sci...316..436C. doi:10.1126/science.1139322. PMID 17446399. S2CID 10395879.