publicações selecionadas Síntese via sol-gel de sistemas mistos óxidos-fluoretos-oxifluoreto dopados com Tm3+ e Eu3+, 01/10/ Síntese via sol-gel de sistemas mistos óxidos-fluoretos-oxifluoretos dopados com Tm3+ e Eu3+ New synthetic routes towards phosphate glasses: structural characterization by solid state NMR New Sol-Gel Routes Towards Phosphate and Silicate Glasses: Structural Characterization by Solid State NMR