Fine-probing the crystal-chemistry of talc by MAS-NMR spectroscopy

Martin, F.; Ferrage, Eric; Petit, Sabine; Parseval, Philippe de; Delmotte, Luc; Ferret, Jocelyne; Arseguel, Didier; Salvi, Stefano

doi:10.1127/0935-1221/2006/0018-0641

Cited by 23 publications

(30 citation statements)

References 42 publications

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“…The peak at − 85 ppm has been attributed to Q 2 tetrahedra [11,17]. The 29 Si resonance of silicates connected to magnesium is shifted to higher frequencies than silicates connected to calcium, in agreement with the observations for anhydrous solids [42][43][44][45] as silicon next to magnesium is less shielded than silicon next to calcium. The predominance of Q 3 species in M-S-H confirms the presence of a silica sheet as discussed in more detail in [11,17].…”

Section: Xrdsupporting

confidence: 77%

Magnesium and calcium silicate hydrates

Lothenbach

Nied

L’Hôpital

et al. 2015

Cement and Concrete Research

205

110

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Section: Xrdsupporting

confidence: 77%

Magnesium and calcium silicate hydrates

Lothenbach

Nied

L’Hôpital

et al. 2015

Cement and Concrete Research

205

110

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“…1 H NMR spectra of synthetic talc reveal three signals at 0.5, 1.8 and 4 ppm while natural talc is characterized by a broad peak centered at 0.5 ppm and attributed to the structural hydrogen atoms in a trioctahedral Mg environment (Figure ) . The peaks observed in synthetic talc samples are assigned to silanol groups on particle edges and physisorbed water at 1.8 and 4.3 ppm, respectively. The hydrophilic character of synthetic talc was also identifiable by FTIR analysis …”

Section: Crystalline Nanotalc Obtained By Hydrothermal Treatmentmentioning

confidence: 99%

“…As the method described by Decarreau et al . did not lead to a stable product, the first patented process described how a stable talc composition could be obtained from a synthetic kerolite through annealing, for example, at 550 °C for 5 h . Although this process allowed obtaining talc particles, this process was still long and tedious.…”

Section: Crystalline Nanotalc Obtained By Hydrothermal Treatmentmentioning

confidence: 99%

Synthetic Talc and Talc‐Like Structures: Preparation, Features and Applications

Claverie

Dumas

Carême

et al. 2017

Chemistry A European J

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This contribution gives a comprehensive review about the progress in preparation methods, properties and applications of the different synthetic talc types: i) crystalline nanotalc synthesized by hydrothermal treatment; ii) amorphous and/or short-range order nanotalc obtained by precipitation, and iii) organic-inorganic hybrid talc-like structures obtained through a sol-gel process or a chemical grafting. Several advantages of nanotalc such as high chemical purity, high surface area, tunable submicronic size, high thermal stability, and hydrophilic character (leading to be the first fluid mineral) are emphasized. Synthetic nanotalc applications are also considered including its use as nanofiller in composite materials, as absorbers of organic compounds, as anticorrosion coatings and as agents for cosmetic applications. Regarding their high industrial application potential, intensive research has been carried out to better understand their behavior and develop processes to produce them. To facilitate further research and development, scientific and technical challenges are discussed in this Review article.

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“…However, natural talc suffers from some limitations in applications such as: 1) its association with other minerals (chlorite, carbonates, asbestos…), 2) its hydrophobic character and 3) its large micron‐size (between 2 and 100 μm after industrial grinding). In this way, the talc synthesis brings a solution to obtain a mineral with a chemical purity and a particle size controlled …”

Section: Ultra‐fast Continuous Synthesis Of Minerals In Scwmentioning

confidence: 99%

Continuous Synthesis of Nanominerals in Supercritical Water

Claverie

Díez-Garcia

Martin

et al. 2019

Chemistry A European J

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The synthesis of minerals should play a crucial role in the development of new and advanced materials. Since 2016, a renewal of interest to enlarge the mineral synthesis towards industrial requirements has been observed, especially thanks to three main recent papers. The innovative process exposed combines a continuous process with the use of supercritical water. In addition to curtail synthesis times, this process offers a control on the particle characteristics (size, crystallinity, structure, etc.) and a capacity to be easily transferable at an industrial scale. This innovative concept is demonstrated with the synthesis of three minerals which are the talc (a phyllomineral), the xonotlite and the tobermorite (two inominerals). This article proposes an overview of the possibilities to synthesize nanominerals in continuous processing for the development of advanced materials with promising industrial applications.

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Fine-probing the crystal-chemistry of talc by MAS-NMR spectroscopy

Cited by 23 publications

References 42 publications

Magnesium and calcium silicate hydrates

Magnesium and calcium silicate hydrates

Synthetic Talc and Talc‐Like Structures: Preparation, Features and Applications

Continuous Synthesis of Nanominerals in Supercritical Water

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