Abstract
It is well known that structural vacancies of carbon in nonstoichiometric titanium carbide form a long-range order structure in the carbon sublattice. For the superlattice structure of titanium carbide, two strucutres have been proposed; a cubic space group Fd3m and a rhomnohedral space group R\bar3m. However, it has not been definitely identified so far which of the two structures is the case. Therefore, in oder to identify the structure, we examined TiC0.59, for which superlattice spots are observed, by high resolution electron microscopy and micro-diffraction technique.It is found that in each variant the superlattice has a periodicity along onle one 〈111〉 direction. From this result, it is concluded that the superlattice of titanium carbide is R\bar3m.
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