Licursi, E.A. et al. 2023. Mineralogical Characterization of Pegmatites with Occurrences of Halloysite in the Regions of Porciúncula (RJ) and Patrocínio do Muriaé (MG), Southeastern Brazil. Anuário do Instituto de Geociências. 46, (Apr. 2023). DOI:https://doi.org/10.11137/1982-3908_2023_46_52487.