@article{gualda_vlach_2005, title={Stoichiometry-based estimates of ferric iron in calcic, sodic-calcic and sodic amphiboles: a comparison of various methods}, volume={77}, ISSN={0001-3765}, url={https://doi.org/10.1590/S0001-37652005000300012}, DOI={10.1590/S0001-37652005000300012}, number={3}, journal={Anais da Academia Brasileira de Ciências}, publisher={Academia Brasileira de Ciências}, author={Gualda, Guilherme A.R. and Vlach, Silvio R.F.}, year={2005}, month={Sept}, pages={521–534} }