Abstract
Application of the hybrid polymeric model to depict silicate melt energetics allows to distinguish chemical interaction terms from strain energy contributions. It is thus shown that Lux-Flood basic oxides when admixed with silica in various proportions along simple binaries give rise to purely endothermic effects, while acidic Lux-Flood oxides give rise to athermal mixtures and amphoteric oxides promote both enthalpic and entropic (non-configurational) chemical interactions. The Lux-Flood acid–base character of the various oxides is shown then to be consistent with experimental determinations of nephelauxetic properties of the limiting oxide components in the mean donor ligand field approximation (optical basicity of Duffy and coworkers). The linear proportionality observed between endothermic heat of mixing and optical basicity difference allows to predict the polymerization extent in simple MO–SiO 2 molten systems in a wide T range with reasonable precision.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
