@inproceedings{inproceedings8d65eb95,
title   = {Stoichiometry-based estimates of ferric iron in calcic, sodic-calcic and sodic amphiboles: a comparison of various methods},
author = {Gualda, Guilherme Augusto Rosa and Vlach, Silvio Roberto Farias},
year = {2002},
booktitle   = {General Meeting of the International Mineralogical Association}
}