Abstract
An interesting type of syntaxy has been observed by transmission electron microscopy where two different polytypes of SiC, 6H and 15R in one case and 6H and 4H in another case, coexist as alternating parallel bands of 200∼500 A ̊ in width with the common c-axis. It is pointed out that this phenomenon is very closely related to an extensive formation of twin bands during the growth of β-SiC and to the coexistence of two kinds of martensite of close packed structure as alternating parallel bands in the transformation products of β-phase noble metal base alloys.
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