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Variability in the crystallographic texture of bivalve nacre

Citace: [] FRÝDA, J., KLINCNAROVÁ, M., FRÝDOVÁ, B., MERGL, M. Variability in the crystallographic texture of bivalve nacre. Bulletin of Geosciences, 2010, roč. 85, č. 4, s. 645-662. ISSN: 1214-1119
Druh: ČLÁNEK
Jazyk publikace: eng
Anglický název: Variability in the crystallographic texture of bivalve nacre
Rok vydání: 2010
Místo konání: Praha
Název zdroje: Česká geologická služba
Autoři: Jiří Frýda , Magdalena Klincnarová , Barbora Frýdová , Doc. RNDr. Michal Mergl CSc.
Abstrakt EN: The crystallographic texture of nacre in eleven bivalve species belonging to the superorders Opponobranchia, Pteriomorpha,and Paleoheterodonta, was studied. Our analysis confirmed a uniform orientation of the crystallographic c-axes of aragonite platelets in all the species studied, but a variable arrangement of a-and b-axes. New data suggest that the rate of alignment of a-and b-axes from girdle-like (unordered nacre) to a single crystal-like texture (ordered nacre) differs considerably among the analyzed species. All observed facts may imply not only evolutionary changes in microstructure and crystallographic texture of the nacre but also in molecular mechanisms driving its production during the long molluscan evolution.
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