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Structural complexity of hexagonal prismatic crystal specimens of fluorapatite-gelatine nanocomposites: A case study in biomimetic crystal research

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Kniep,  Rüdiger
Rüdiger Kniep, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Simon,  Paul
Paul Simon, Chemical Metal Science, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Rosseeva,  Elena
Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Kniep, R., Simon, P., & Rosseeva, E. (2014). Structural complexity of hexagonal prismatic crystal specimens of fluorapatite-gelatine nanocomposites: A case study in biomimetic crystal research. Crystal Research and Technology, 49(1), 4-13. doi:10.1002/crat.201300207.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0019-B26C-3
Abstract
Hexagonal prismatic crystal-like entities of fluorapatite-gelatine nanocomposites were grown by double-diffusion in gelatine gels. The Bragg pattern of the specimens (containing 2.3(3) wt.-% gelatine) is consistent with fluorapatite. TEM images together with atomistic computer simulations reveal the material to be best described as a mosaic-dominated nanocomposite superstructure. Intrinsic electric dipole fields (detected by electron holography), generated by a non-classical crystallization process of composite nanoboards (elongated platelets), cause the integration of a meso/macroscopic pattern (symmetry: 6/m) of gelatine microfibrils into the superstructure matrix.