Both spiral growth and terrace flow growth were observed on the vicinal (11
1) faces of a multiply twinned diamond particle by scanning electron micros
copy (SEM). Furthermore, both left- and right-handed spirals were obtained
on a fivefold multiply twinned particle. The SEM results provide direct evi
dence for which two types of growth modes could exist at the same time duri
ng the chemical vapor deposition (CVD) diamond growth. It depends strongly
on whether there exists a screw dislocation on the underlying diamond subst
rate for each respective growth on (111) faces. We explained all the featur
es using the classical crystal growth theory of Burton, Cabrera and Frank.