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Related Concept Videos

Hydration of Cement01:24

Hydration of Cement

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Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...
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Strength and Heat of Hydration01:29

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The hydration of cement is an exothermic reaction in which heat is generated as cement hydrates. This heat of hydration is critical to cement's strength development. The rate at which this heat is generated affects the temperature rise, with a majority of the heat being released early in the hydration process, half within the first three days, and about 75% within the first week.
The heat of hydration for each cement compound is significant; for instance, tricalcium aluminate (C3A) and...
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Ionic Crystal Structures02:42

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Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
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Updated: Dec 23, 2025

Preparation of Mica Supported Lipid Bilayers for High Resolution Optical Microscopy Imaging
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Hydrated Silicate Layer Formation on Mica-Type Crystals.

Misa Sugiura1, Mai Sueyoshi2, Ryuichi Seike2

  • 1Department of Chemistry and Material Engineering, Faculty of Engineering, Shinshu University, 4-17-1, Wakasato, Nagano 380-8553, Japan.

Langmuir : the ACS Journal of Surfaces and Colloids
|April 25, 2020
PubMed
Summary

Researchers grew hydrated silicate layers on mica surfaces using a novel synthesis. This process creates cation-exchangeable materials with potential applications in adsorption and material science.

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Area of Science:

  • Materials Science
  • Geochemistry
  • Mineralogy

Background:

  • Mica-type silicates, like fluorophlogopite and muscovite, possess unique layered structures.
  • Understanding surface modifications of these minerals is crucial for developing novel functional materials.

Purpose of the Study:

  • To investigate the formation of cation-exchangeable hydrated silicate layers on synthetic fluorophlogopite and natural muscovite.
  • To explore the chemical processes involved in the growth of these hydrated layers.

Main Methods:

  • Reaction of synthetic fluorophlogopite with LiF, MgCl2, and silica sol in water at 373 K in the presence of urea.
  • Analysis of reaction products, including structural characterization of the formed hydrated phyllosilicate layer.
  • Testing cation exchange capacity using dimethyldistearylammonium and adsorption of methylene blue.

Main Results:

  • A 1 nm hectorite-like hydrated silicate layer was homogeneously formed on the surface of synthetic mica.
  • Urea hydrolysis increased pH, facilitating magnesium hydroxide formation and silicate layer crystallization.
  • The synthesized layered silicates exhibited cation-exchange properties and adsorbed methylene blue.

Conclusions:

  • A novel method for growing cation-exchangeable hydrated silicate layers on mica surfaces was established.
  • The process involves urea hydrolysis, isomorphic substitution, and silica sol uptake.
  • These modified micas show potential for applications in adsorption and as functional materials.