Volpi, V.Montesso, M. [UNESP]Ribeiro, S. J. L. [UNESP]Viali, W. R.Magon, C. J.Silva, I. D. A.Donoso, J. P.Nalin, M. [UNESP]2018-11-272018-11-272016-01-01Journal Of Non-crystalline Solids. Amsterdam: Elsevier Science Bv, v. 431, p. 135-139, 2016.0022-3093http://hdl.handle.net/11449/165015This paper shows the study of optical and structural properties of SbPO4-PbGeO3-MnCl2 glass and glass-ceramics. Glass was prepared by melting-quenching methodology while the glass ceramic was obtained by controlled thermal treatment of the glass. The UV-Vis results show that the glass presents only Mn2+ species, but, the thermal treatment leads to oxidation of Mn2+ to Mn3+ species, what was evidenced by an absorption band in the visible range. High resolution transmission electron microscopy shows the presence of nanocrystalline phases of Mn2O3 and PbGeO3 confirming the formation of a glass-ceramic Electron paramagnetic resonance measurements suggest that manganese ions occupy only one environment in the glass. On the other hand, for glass-ceramic at least three different structural sites were identified by simulation of the EPR signal. (C) 2015 Elsevier B.V. All rights reserved.135-139engGlassGlass-ceramicManganeseUV-VisEPRArtigo10.1016/j.jnoncrysol.2015.04.022WOS:000367126600027Acesso abertoWOS000367126600027.pdf