INVESTIGATION OF DISSOLUTION KINETICS OF A NIGERIAN COLUMBITE IN HYDROFLUORIC ACID USING THE SHRINKING CORE MODEL. Nigerian Journal of Technology, [S. l.], v. 35, n. 4, p. 841–846, 2016. DOI: 10.4314/njt.354.1177. Disponível em: https://mail.nijotech.com/index.php/nijotech/article/view/1177. Acesso em: 19 apr. 2026.