Composition-structure-property correlations in rare earth doped heavy metal oxyfluoride glasses - Doerenkamp, Carsten; Carvajal, E.; Faria, Walter José Gomes Juste; Donoso, José Pedro; de Camargo, Andrea Simone Stucchi; Magon, Claudio José; Eckert, Hellmut (International Congress on Glass - ICG, 2019)