Compositional and structural characterization of Quartz from Southern region of Minas Gerais - Martins, Roberto Turibio Ebina Kawanaka; Ferreira, Isabela Alves; Trindade, Neilo Marcos; Yoshimura, Elisabeth Mateus; Ulsen, Carina; Souza, Melina Mara de (Autumn Meeting, 2022)