Crystallization Conditions for Various Crystallographic Forms of Diamond

Abstract

The temperature controls the production and growth of the various morphological types of diamond (for p ≈ constant) [1–3]. Cubic forms predominate at comparatively low temperatures (1050°C), while octahedral ones predominate at higher temperatures (≥1100°C). The temperature affects the growth rate, which itself is reflected in the shape. It is therefore of interest to relate the morphology to the growth rate. There appears to be only one published paper that indicates a higher linear growth rate for octahedral forms by comparison with cubic ones [4]. This is an unusual relationship between the growth rates, so we repeated the measurements of [4].