Effect of lithium addition on Te4+ emission in TeO2- Li2O glasses - Costa, Francine Bettio; Souza, Ana Kely Rufino; Silva, Junior Reis; Moraes, João Carlos Silos; Nunes, Luiz Antônio de Oliveira; Andrade, Luiz Humberto da Cunha; El-Mallawany, Raouf; Lima, Sandro Marcio (Brazil MRS Meeting, 2021)