Crystal Structure of InSe Grown from Melt and Its Structure Transition

Abstract

The crystal structure of InSe grown from the melt in evacuated capsules, was determined by the X-ray single crystal technique. It was ascertained that the rhombohedral structure transforms into the h.c.p. structure under heat-treatment, and that the reverse transition is also possible. Many InSe whiskers were obtained and the crystallographic relation between the two structures in the whiskers is discussed. Some h.c.p. whiskers gave anomalous layer lines in their X-ray rotation patterns, and this is attributed to multiple reflections caused by the fibrous structure of the whiskers. The atomic distances within the coordination units of the InSe structures are revised.