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Khandarkhaeva, Saiana ; Fedotenko, Timofey ; Bykov, Maxim ; Bykova, Elena ; Chariton, Stella ; Sedmak, Pavel ; Glazyrin, Konstantin ; Prakapenka, Vitali ; Dubrovinskaia, Natalia ; Dubrovinsky, Leonid:
Novel Rhenium Carbides at 200 GPa.
In: European Journal of Inorganic Chemistry.
Bd. 2020
(2020)
Heft 22
.
- S. 2186-2190.
ISSN 1099-0682
DOI: https://doi.org/10.1002/ejic.202000252
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Bundesministerium für Bildung und Forschung Deutsche Forschungsgemeinschaft |
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Abstract
Laser heating of rhenium in a diamond anvil cell to 3000±300 K at about 200 GPa results in formation of two previously unknown rhenium carbides, hexagonal WC-type structured ReC and orthorhombic TiSi2-type structured ReC2. The shortest C–C distances 1.758(3) Å at 219(5) GPa and 1.850(4) Å at 180(7) GPa found in honeycomb-like carbon nets in the structure of ReC2 are quite unusual. The Re–C solid solution formed at multimegabar pressure has the carbon content of ≈ 20 at\%.