Caracterização espectroscópica de peixe do período cretáceo (Bacia do Araripe)

Química Nova

Ricardo Jorge Cruz Lima²  Antonio Alamo Feitosa Saraiva¹  Silvania Lanfredi¹  Marcos Augusto De Lima Nobre¹  Paulo De Tarso Cavalcante Freire¹  José Marcos Sasaki¹ 

[1] ,Universidade Regional do Cariri Departamento de Física Juazeiro do Norte CE ,Brasil

关键词: Fossil;    X-ray diffraction;    Fourier transform infrared spectroscopy;   

DOI  :  10.1590/S0100-40422007000100005

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY-NC   
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