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Polytypes and twins in the diamond–lonsdaleite system formed by high‐pressure and high‐temperature treatment of graphite
Author(s) -
Kulnitskiy Boris,
Perezhogin Igor,
Dubitsky Gennady,
Blank Vladimir
Publication year - 2013
Publication title -
acta crystallographica section b
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.604
H-Index - 33
eISSN - 2052-5206
pISSN - 2052-5192
DOI - 10.1107/s2052519213021234
Subject(s) - diamond , graphite , materials science , transmission electron microscopy , material properties of diamond , electron energy loss spectroscopy , high pressure , nanometre , crystallography , analytical chemistry (journal) , nanotechnology , composite material , chemistry , physics , thermodynamics , chromatography
As a result of the high‐temperature and high‐pressure treatment of graphite we obtained a powder containing diamond and lonsdaleite. The structure and properties of the powder were studied by transmission electron microscopy (TEM) and electron energy‐loss spectroscopy (EELS). It was found that the synthesized material contains not only diamond nanoparticles, but also some relatively large (up to several nanometers) fragments of lonsdaleite. 4 H and 6 H polytypes were found in some of the diamond particles. Incoherent twin boundaries were observed in the diamond particle containing fragments of lonsdaleite.