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Zeitschrift für Kristallographie - Crystalline Materials

Ed. by Antipov, Evgeny / Bismayer, Ulrich / Huppertz, Hubert / Petrícek, Václav / Pöttgen, Rainer / Schmahl, Wolfgang / Tiekink, E. R. T. / Zou, Xiaodong

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Towards systematics of calcite biocrystals: insight from the inside

Wolfgang W. Schmahl1 / Erika Griesshaber* / Klemens Kelm2 / Alexander Ball3 / Andreas Goetz4 / Dayin Xu5 / Lisa Kreitmeier6 / Guntram Jordan7

1Ludwig-Maximilians-Universität München, GeoBioCenter and Dept. of Earth and, München, Deutschland

2Deutsches Zentrum für Luft- und Raumfahrt, Institut für Werkstoffforschung, Köln-Porz, Deutschland

3Natural History Musuem, London, SW7 5BD, Großbritannien

4Ludwig Maximilians Universität München, GeoBioCenter and Department of Earth, München, Deutschland

5Ludwig Maximilians Universität München, GeoBioCenter and Department of Earth, München, Deutschland

6Ludwig Maximilians Universität München, Department of Earth and Environmental Sciences, München, Deutschland

7Ludwig Maximilians Universität München, GeoBioCenter and Department of Earth and Environme, München, Deutschland

* Correspondence address: Ludwig Maximilians Universität München, GeoBioCenter and Department of Earth, Theresienstr. 41, and Environmental Sciences, 80333 München, Deutschland,

Citation Information: Zeitschrift für Kristallographie - Crystalline Materials. Volume 227, Issue 8, Pages 604–611, ISSN (Print) 2194-4946, DOI: 10.1524/zkri.2012.1479, July 2012

Publication History

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Biocrystals of calcite are frequent as they are employed by many phylae of organisms in shells, eggshells, teeth, spines or sensoric apparatus. The calcite phase in these materials occurs in a range of constitutions, from polycrystalline fabrics to “single-crystals”. We demonstrate systematics of calcite biocrystal architectures, from the hybrid composite mesocrystal fibres of brachiopod and mollusc shells, via the submillimeter-sized hybrid composite crystal aggregates formed by mesocrystal fibres with both morphological co-orientation and lattice co-oriäentation, to more complex purpose-oriented multiplex äcomposite crystals of echinoderm teeth, which feature a high degree of single-crystal-like 3D orientational correlation of microstructural elements of different morphology and composition. These systematics rely on observations by electron backscatter diffraction (EBSD) and TEM.

Keywords: Biomineralization; Nacre; Mesocrystal; Hierarchical architecture; ACC

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