Spectroscopic characterization of biogenic silica

Amorphous biogenic silicas were studied by FTIR and MAS-NMR spectroscopy. Fossil diatom frustules and sponge spicules exhibit a highly condensed and well-organised silica whereas the silica frustule of living diatoms is much less condensed, suggesting that some condensation process still happens upo...

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Bibliographic Details
Published in:Journal of non-crystalline solids 2003-02, Vol.316 (2), p.331-337
Main Authors: Gendron-Badou, Aı̈cha, Coradin, Thibaud, Maquet, Jocelyne, Fröhlich, François, Livage, Jacques
Format: Article
Language:English
Subjects:
Animal, plant and microbial ecology
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
General aspects. Techniques
Methods and techniques (sampling, tagging, trapping, modelling...)
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Summary:Amorphous biogenic silicas were studied by FTIR and MAS-NMR spectroscopy. Fossil diatom frustules and sponge spicules exhibit a highly condensed and well-organised silica whereas the silica frustule of living diatoms is much less condensed, suggesting that some condensation process still happens upon fossilisation during the diagenetic evolution of silica. Moreover, the silica network of living diatoms appears to be linked to the bio-organic components of the cell, in agreement with the biosilicification mechanisms suggesting that some proteins or polysaccharides favour the formation of silica.
ISSN:0022-3093
1873-4812
DOI:10.1016/S0022-3093(02)01634-4