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Etudes electrique et Raman de borotungstates et de boromolybdates de lithium vitreux

Authors:	Alain Levasseur Mohamed Kbala Mariano Sanz Michel Couzi

Institution:	1. Laboratoire de Chimie du Solide du C.N.R.S., 33405 Talence Cedex, France;1. Laboratoire de Chimie Minérale, 33405 Talence Cedex, France;2. Laboratoire de Spectroscopie Infrarouge (associé au CNRS), 33405 Talence Cedex France

Abstract:	Conductivity studies of glasses obtained from the B₂O₃Li₂OLi₂MoO₄ and B₂O₃Li₂OLi₂WO₄ systems have been carried out. The presence of the transition element in tetrahedral coordination and with two different oxidation states is discussed. A Raman spectroscopy study shows that the MoO₄ or WO₄ tetrahedra are slightly compressed by the network forming lattice.

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