Rare earth element and yttrium geochemistry applied to the genetic study of cryolite ore at Pitinga Mine (Amazon, Brazil) - Minuzzi, Orlando R. R.; Bastos Neto, Artur C.; Formoso, Milton Luiz Laquintinie; Andrade, Sandra; Janasi, Valdecir de Assis; Flores, Juan A. (Anais da Academia Brasileira de Ciências, 2008)