Method of preparation of chrysoberyl and beryl single crystals

摘要

Single crystals of chrysoberyl and beryl are prepared in a process in which the rods are formed of the desired composition and the rods are heated in a controlled atmosphere using infra-red rays. The infra-red rays are focussed upon a restricted portion of a rod to form a melt zone which is moved along the rod. A seed crystal of the desired type is preferably used. Fluxes are unnecessary and twinning is avoided.