Caracterização espectroscópica de peixe do período cretáceo (Bacia do Araripe)
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Data
2007-02-01
Autores
Lima, Ricardo Jorge Cruz
Saraiva, Antonio Alamo Feitosa
Lanfredi, Silvania [UNESP]
Nobre, Marcos Augusto de Lima [UNESP]
Freire, Paulo de Tarso Cavalcante
Sasaki, José Marcos
Título da Revista
ISSN da Revista
Título de Volume
Editor
Sociedade Brasileira de Química
Resumo
The study of fossils has made considerable progress over the last years as a result of the use of new experimental techniques. This paper describes the chemical composition of a fossilized fish of the Cretaceous period, from a 100 million-year-old, material originated from the Araripe Basin (northeastern Brazil). The chemical composition of the fossilized fish was analyzed by means of X-ray powder diffraction and Fourier transform infrared spectroscopy (FT-IR). The spectroscopic study has proven that the main substances found in the fossilized fish are CaCO3 and Ca5(PO4)3(OH). A tentative mechanism to explain the fossilization process is also given.
Descrição
Palavras-chave
Fossil, X-ray diffraction, Fourier transform infrared spectroscopy
Como citar
Química Nova. Sociedade Brasileira de Química, v. 30, n. 1, p. 22-24, 2007.