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Apatite crystal in hard tissue of conodont fossils |
| MISHIMA Hiroyuki1, KAKEI Mituo2, YASUI Toshio3, MIYAMOTO Saori4, MIAKE Yasuo5, YANAGISAWA Takaaki5 |
| 1.Department of Health Sciences, Kochi Gakuen College; 2.Division of Oral Anatomy, School of Dentistry, Meikai University, ; 3.The Yokogurayama Natural Forest Museum; 4.Applied Life Science Course, Kochi Gakuen College; 5.Department of Ultrastructural Science, Oral Health Science Center, Tokyo Dental College; |
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Abstract The present study was aimed at examining the nature of apatite crystal in the tooth apparatus of a conodont fossil using transmission electron microscopy (TEM), scanning electron microscopy (SEM), laser Raman microprobe spectrometry and electron-probe microanalysis (EPMA). The hard tissue of the condont consisted of 2 layers and the organization varied with the size of the crystal. Higher magnification showed that the crystals were observed in the lattice of (100) and the central dark lines were not present. Ca, P, and F were detected in the crystal using EPMA. Our results indicate that the apatite crystal in conodont fossils is not hydroxyapatite but fluorapatite.
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Issue Date: 05 June 2008
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