2011
DOI: 10.1021/cg200136t
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Nanostructure of Biogenic Calcite Crystals: A View by Small-Angle X-Ray Scattering

Abstract: One of the most fascinating topics currently being discussed in the field of biomineralization is the occlusion of organic macromolecules within mineral crystals. It is already known that intracrystalline organic inclusions in biogenic calcite improve the fracture behavior and anisotropically distort the calcite lattice. However, the detailed structure of the crystals and the underlying processes leading to the incorporation of the organic molecules are poorly understood. In this work, we investigate calcite p… Show more

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Cited by 36 publications
(51 citation statements)
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“…Along the crystallographic c-axis, there are alternating organic-rich and -poor regions on a length scale of tens of nanometres, whereas in the perpendicular directions, the distribution of nanopatches is more random and uniform. Gilow et al [12] also concluded that organic molecules attach preferentially to the highly charged f001g planes of the prismatic calcite of Pinna (which is a close relative of Atrina). A similar pattern has been recently observed in the nacre of the mussel Perna [33].…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Along the crystallographic c-axis, there are alternating organic-rich and -poor regions on a length scale of tens of nanometres, whereas in the perpendicular directions, the distribution of nanopatches is more random and uniform. Gilow et al [12] also concluded that organic molecules attach preferentially to the highly charged f001g planes of the prismatic calcite of Pinna (which is a close relative of Atrina). A similar pattern has been recently observed in the nacre of the mussel Perna [33].…”
Section: Discussionmentioning
confidence: 99%
“…This is referred to as mesocrystalline behaviour [10]. Previous authors [1,11], using high-resolution synchrotron XRD, determined coherent domains with lengths ranging from 300 to 750 nm for the calcitic prisms of two species of Atrina and one of Pinna, with very low mosaicity (0.038 for Atrina serrata [1], and less than 18 for Pinna nobilis [12]). They are anisotropic in shape, extending differently along diverse crystallographic directions [11].…”
Section: Introductionmentioning
confidence: 99%
“…For example, it was shown that proteins in P. lividus sea urchin spines are preferentially adsorbed on calcite planes parallel to the c-axis (hk0-planes), 23 whereas proteins from sponge spicules and from calcitic prims of mollusk shells are mostly attached to the (001)-planes. [31][32][33][34] Note that in sea urchin spines, the c-axis is aligned with the long axis of the spines, whereas in the test plates (in P. lividus species), it is tangent to the test curvature in the apical direction. 35 To provide single-crystal-like diffraction spots, the organic/inorganic interfaces have to be coherent, i.e.…”
Section: Introductionmentioning
confidence: 99%
“…21 To this regard, inhomogeneous distributions of nm-sized organic inclusions have been shown by small-angle X-ray scattering in individual calcitic crystallites extracted from specific mollusk shells thus creating an organic-inorganic material with enhanced mechanical properties. 22 To accommodate an inorganic matrix such as FeCO 3, which is the iron counterpart of calcite, a hybrid nanofiller could be used. Recently, focus on polyhedral oligomeric silsesquioxane (POSS) molecules as hybrid nanofiller ( Supplementary Fig.…”
Section: Introductionmentioning
confidence: 99%