ABSTRACT
This chapter presents a variety of diagrams showing the relationship between morphology and growth temperature and gas composition. The morphology of diamond, natural or man-made, is a consequence of the basic diamond cubic crystal structure and the quality and rate of crystal growth in various crystallographic directions which are, in turn, strongly influenced by the growth conditions. Diamond crystals found in nature exhibit a wide variety of shapes. Many of the physical and chemical properties of diamond single crystals vary strongly with crystallographic direction. The properties of diamond single crystals depend on the crystal orientation, and the defects and impurities incorporated in the crystal. Polycrystalline diamond consists of many small crystals grown together to form a film or bulk diamond. The extraordinarily high thermal conductivity of diamond is due to the rigidity and regularity of the crystal bonds, making phonon conduction very efficient.
