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- Title
Formation Mechanism of CaCO<sub>3</sub> Spherulites in the Myostracum Layer of Limpet Shells.
- Authors
Shitao Wu; Chang-Yang Chiang; Wuzong Zhou
- Abstract
CaCO3 spherulites were found in the myostracum layer of common limpet shells collected from East Sands, St Andrews, Scotland. Their microstructures were revealed by using powder X-ray diffraction, scanning electron microscopy, high-resolution transmission electron microscopy, and energy dispersive X-ray microanalysis. The formation mechanisms of these spherulites and their morphology evolution were postulated. It was proposed that spherical particles of an inorganic and biological composite formed first. In the centre of each spherical particle a double-layer disk of vaterite crystal sandwiching a biological sheet developed. The disk crystal supplies a relatively strong mirror symmetric dipole field, guiding the orientations of the nanocrystallites and the arrangement of mesorods and, therefore, determining the final morphology of the spherulite.
- Subjects
SPHERULITES (Polymers); LIMPETS; MICROSTRUCTURE
- Publication
Crystals (2073-4352), 2017, Vol 7, Issue 10, p319
- ISSN
2073-4352
- Publication type
Article
- DOI
10.3390/cryst7100319