The devitrification of Lithium metaborate (cas 13453-69-5): polymorphism and glass formation

Add time:08/09/2019    Source:sciencedirect.com

The ambient pressure devitrification of glassy lithium metaborate has been studied by Raman and infrared spectroscopies. Of the three different polymorphs obtained, two are identified as α- and γ-LiBO2, while a third one, β′-LiBO2, is thought to consist of alternating borate triangles and tetrahedra respecting the metaborate stoichiometry (BO2-. The network of glassy LiBO2 prepared by melt quenching consists mainly of local arrangements similar to those encountered in all three polymorphs in accordance with the ideas of Krogh-Moe. It is argued that the glass structure exhibits the memory of structural transformations occuring in the vicinity of Tg, and may be described by models implying the existence of structural ‘granularity’.

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