Red persistent luminescence or 'R IND. 2''O IND. 2' S:'EU POT. 3+', 'MG POT. 2+', TI POT. IV' materials '(R POT. 3+:La, Gd and Y)' prepared by microwave-assisted synthesis - Machado, Ian Pompermayer; Carvalho, José Miranda de; Silva, Ivan Guide Nunes da; Rodrigues, Lucas Carvalho Veloso; Brito, Hermi Felinto de (Brazilian MRS Meeting, 2015)