Spectroscopic characterization of a fish of the cretaceous period (Araripe Basin)

Quimica nova

Nobre, Marcos Augusto de Lima¹  Lanfredi, Silvania¹  Freire, Paulo de Tarso Cavalcante²  Sasaki, José Marcos²  Saraiva, Antonio Alamo Feitosa³  Lima, Ricardo Jorge Cruz⁴ 

[1] Universidade Estadual Paulista, Presidente Prudente, Brasil;Universidade Federal do Ceará, Fortaleza, Brasil;Universidade Regional do Cariri, Crato, Brasil;Universidade Regional do Cariri, Juazeiro do Norte, Brasil

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

DOI  :  10.1590/S0100-40422007000100005

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

The study of fossilshas made considerable progress over the last years as a result of the use ofnew experimental techniques. This paper describes the chemical composition ofa fossilized fish of the Cretaceous period, from a 100 million-year-old, materialoriginated from the Araripe Basin (northeastern Brazil). The chemical compositionof the fossilized fish was analyzed by means of X-ray powder diffraction andFourier transform infrared spectroscopy (FT-IR). The spectroscopic study hasproven 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