论文标题
200 GPA的新型碳化物
Novel rhenium carbides at 200 GPa
论文作者
论文摘要
在大约200 GPA下，钻石砧细胞中rhenium的激光加热至3000 K，从而形成了两个以前未知的碳化物，六边形WC型WC型结构化REC和原骨TISI2-TISI2-TYPE结构化rec2。在多层压力下形成的RE-C滑动溶液的碳含量为Ca。 20 at％。出乎意料的长C-C距离（约1.76-1.85 a）在REC2结构中的“石墨烯状”碳网中无法通过碳原子之间的简单共价结合来解释，并且在非常高的压力下，在非常高的压力下，无机化合物中碳原子之间的相互作用机制可能与遥远的情况不同。
Laser heating of rhenium in a diamond anvil cell to 3000 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 Re-C slid solution formed at multimegabar pressure has the carbon content of ca. 20 at%. Unexpectedly long C-C distances (ca. 1.76-1.85 A) in 'graphene-like' carbon nets in the structure of ReC2 cannot be explained by a simple covalent bonding between carbon atoms and suggest that at very high pressures the mechanism of interaction between carbon atoms in inorganic compounds may be different from that considered so far.
