APLICAÇÃO DA ESPECTROSCOPIA RAMAN NA CARACTERIZAÇÃO DE MINERAIS PERTENCENTES A UMA GEOCOLEÇÃO

• Main Authors: Adriele R. Santos, Denise B. Menezes, Javier Ellena, Marcelo B. Andrade
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química
• Series: Química Nova
• Subjects: geocollection; Raman spectroscopy; mineralogy
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422019004500489&lng=en&tlng=en

Lots of Educational Institutions hold their own geocollection due to its utility and versatileness in the practical formation of new generations of skillful professionals in many areas of Science and Technology. The Geoscience laboratory of the Federal University of São Carlos has a collection of minerals used in engineering, mineralogy and other technological courses ministered to undergraduates of different programs. Three samples of this collection were identified using Raman spectroscopy. The analysis carried out in this work enabled the characterization of the major mineral components in the samples as well as the identification of other minor crystalline phases present in the sample. It is important to notice that this information could not be obtained using the regular analyses of mineral properties, such as density, streak, hardness, brightness, cleavage, among others. As a result, the samples A170801 and A170802 were characterized as being mainly calcite (CaCO3) and spodumene (LiAlSi2O6), respectively. On the other hand, sample A170803 show the presence of three different minerals: graphite (C), quartz (SiO2) and muscovite [KAl2(Si3Al)O10(OH,F)2].