Oliveira, Tiago FernandesSouza, Carlson Pereira deMoriyama, André Luis Lopes2021-04-272020-03-01OLIVEIRA, T.F.; SOUZA, C.P.; MORIYAMA, A. L.. Acid leaching and thermal treatments in the obtaining of mixed oxides of Nb and Ta from ferrocolumbite. Minerals Engineering, v. 147, p. 106157, 2020. DisponÃvel em: https://www.sciencedirect.com/science/article/abs/pii/S0892687519305680?via%3Dihub. Acesso em: 27 abr. 2021. https://doi.org/10.1016/j.mineng.2019.106157.0892-6875https://repositorio.ufrn.br/handle/123456789/32328NiobiumCalcinationFerrocolumbiteMixed oxidesTantalumAcid leaching and thermal treatments in the obtaining of mixed oxides of Nb and Ta from ferrocolumbitearticle10.1016/j.mineng.2019.106157