Structural transformations of the cumulene form of amorphous carbyne at high pressure

Autor:	S. E. Evsyukov, Yu. P. Kudryavtsev, A. G. Lyapin, Vadim V. Brazhkin, Svetlana Popova, T. D. Varfolomeeva, S. G. Lyapin
Rok vydání:	1997
Předmět:	Materials science Physics and Astronomy (miscellaneous) Carbyne chemistry.chemical_element Cumulene Amorphous solid Crystal chemistry.chemical_compound Crystallography chemistry Covalent bond Phase (matter) Graphite Carbon
Zdroj:	Journal of Experimental and Theoretical Physics Letters. 66:255-260
ISSN:	1090-6487 0021-3640
DOI:	10.1134/1.567463
Popis:	Structural transformations of the cumulene form of amorphous carbyne which are induced by heating at high pressure (7.7 GPa) are investigated. These can be described by the sequence amorphous phase — crystal — amorphous phase — disordered graphite. Raman scattering shows that predominately the chain structure of carbyne remains at the first three stages. It was found that the intermediate crystalline phase is an unknown modification of carbon whose structure is identified as cubic (a=3.145 A). A mechanism of structural transformations in carbyne that involves the formation of new covalent bonds between chains is discussed.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0b905f4fda957be25bb615b06b343b54 https://doi.org/10.1134/1.567463 Zobrazit plný text záznamu Plný text ve formátu PDF