A hydrated crystalline calcium carbonate phase: Calcium ... - AAAS
网页2019年1月25日 · Calcium carbonate (CaCO 3) forms important minerals on Earth and is a model system for understanding crystal nucleation. Three different structures of CaCO 3 are known, along with two structures that are hydrated. Zou et al. found a third hydrated CaCO 3 structure formed from amorphous CaCO 3 in the presence of magnesium ions.
The nano- and meso-scale structure of amorphous calcium carbonate
网页2022年4月27日 · Here, using Monte Carlo simulations constrained by X-ray and neutron scattering data together with model building, we demonstrate a method for determining the structure of these intermediates...
Geometrically frustrated interactions drive structural complexity in ...
网页2023年9月25日 · The empirical model parameters for amorphous calcium carbonate take values known to promote structural complexity. We thus show that both the complex structure and its resilience to...
Uncovering the Role of Bicarbonate in Calcium Carbonate …
网页2021年5月11日 · Reactions of nucleation and crystallization operating at distinct spatiotemporal scales make critical contributions to biological and geological phenomena, where calcium carbonate (CaCO 3) is an important scientific model system for investigating the molecular mechanisms of these processes.
Crystallization of Calcium Carbonate: Modeling Thermodynamic ...
网页2022年9月6日 · Calcium carbonate (CaCO 3) crystallization is a complex operation due to the diverse thermodynamic and kinetic factors involved during the particle formation of vaterite, aragonite, and calcite. This article involves the experimental and computational study of CaCO 3 crystallization in the presence of Mg 2+, Ba 2+, and Sr 2+.
Continuous Structural Evolution of Calcium Carbonate Particles: A ...
网页2007年3月3日 · The existence of this structural sequence provides unique insight into the mechanism of polymer-mediated crystallization. We propose that it reflects continuity in the crystallization mechanism itself, spanning the limits from nonoriented aggregation of nanoparticles to classical ion-by-ion growth.
Study on microscopic pores and physico-mechanical properties of …
网页2 天之前 · Table 5 Model parameters at calcium carbonate content of 5%. Full size table The parameters in Tables 4 and 5 are substituted into the model to obtain the fitting and experimental results, as ...
Biomineralization: Integrating mechanism and evolutionary history …
网页2022年3月9日 · We show that insights on CaCO 3 skeleton formation pathway (15, 23 – 26), trends and constraints from evolutionary history (27), genetics, transcriptomics, proteomics, and isotope geochemistry (9) all point toward a simple but powerful plausible conceptual model for CaCO 3 biomineralization.
Dynamics of calcium carbonate formation: Geochemical …
网页2018年11月1日 · It aims to describe the successive precipitation of amorphous calcium carbonate (ACC) and calcite, taking account of their mutual influence: ACC precipitates according to the standard TST and creates surface complexation sites from which calcite can form and create new surface complexation sites.
Biomineralization Process Inspired In Situ Growth of Calcium Carbonate ...
网页3 天之前 · Biological composites such as bone, nacre, and teeth show excellent mechanical efficiency because of the incorporation of biominerals into the organic matrix at the nanoscale, leading to hierarchical composite structures. Adding a large volume of ceramic nanoparticles into an organic molecular network uniformly has been a challenge in engineering applications. However, in natural organisms ...
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