1. Department of Environmental Science and Engineering, School of Architecture and Environment, Sichuan University, Chengdu 610065, China 2. Chengdu Institute of Relics and Archaeology, Chengdu 610071, China 3. School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, China
Abstract：Diagenetic effect during burial on the hydroxyapatite in enamel and dentin from fossil human and animal teeth was examined, using X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). For the enamel and dentin of all fossil teeth, XRD patterns exhibit bulge line and overlap between major reflections of hydroxyapatite, and the crystallinity of hydroxyapatite is low. For each infrared spectrum, H2O and OH- have distinct peaks of absorbance, and PO3-4and CO2-3 ions have intensive infrared vibration modes at the fundamental wave numbers. The component of hydroxyapatite of all fossil teeth is similar to the modern biological hydroxyapatite. Furthermore, the index (PCI) which reflects the hydroxyapatite crystallinity of each sample ranges from 2.4 to 4.0 while the index (BPI) reflecting the amount of type B carbonate to phosphate indicates that the values of CO2-3 content in hydroxyapatite are rather high, accordingly the crystallinity of all fossil hydroxyapatites are poor. It could be concluded that little alteration of hydroxyapatites from fossil human and animal teeth occurred in the process of diagenesis in Jinsha Relict, Chengdu, China.
黄成敏1,张擎2,柏松1,王成善3*. 成都金沙遗址古人类与古动物牙齿的FTIR与XRD分析[J]. 光谱学与光谱分析, 2007, 27(12): 2448-2452.
HUANG Cheng-min1,ZHANG Qing2,BAI Song1,WANG Cheng-shan3*. FTIR and XRD Analysis of Hydroxyapatite from Fossil Human and Animal Teeth in Jinsha Relict, Chengdu. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2007, 27(12): 2448-2452.
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