Abstract
We present a theory of crystallization of a melt sphere of forsteriteand enstatite compositions taking account of nucleation and growth ofcrystalline nuclei and the release of latent heat due to thecrystallization. From comparison of the theory with the experimentusing a gas jet levitation system by Nagashima et al. (2006), weestimate the interfacial energy between melt and crystal and theactivation energy of self-diffusion. We disucss the conditions forthree states in the cooling of the melt, i.e. remelting, crystal growth,and glass formation, found in the experiment.