The study of the kinetics and the mechanism of dehydroxylation in muscovite by ESR on Fe 3+

Kalinichenko, E. A.; Litovchenko, A. S.; Kalinichenko, A. M.; Bagmut, N. N.; Dekhtyaruk, N. T.

doi:10.1007/s002690050067

Cited by 13 publications

(3 citation statements)

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“…These terms include a variety of intergrown and mixed-layered structures such as: biotite-chlorite, white mica-chlorite, chlorite-vermiculite, lowcharge biotite and chlorite-smectite (Velde, 1978;Black, 1975;Nicot, 1981;Maresch et al, 1985;Lee and Peacor, 1985;Franceschelli et al, 1986;Mellini et al, 1991;Ruiz Cruz, 1999Ruiz Cruz et al, 2002;Do Campo and Nieto, 2005;Ruiz Cruz and Nieto, 2006). Interesting thermal decomposition studies of phyllosilicates such as muscovite, illite and chlorite, carried out on single crystals or on phases occurring in raw materials for ceramic production or in the ceramic micromass (consisting of material <10 mm in size, this term is used in preference to matrix) are also available in the relevant literature (Guggenheim et al, 1987;Worden et al, 1992;Murad and Wagner, 1996;Kalinichenko et al, 1997;Mazzucato et al, 1999;Sanchez-Navas, 1999;Kloprogge and Frost, 2000;Cultrone et al, 2001;RodriguezNavarro et al, 2003;Viti et al, 2004;Devineau et al, 2006;Gualtieri and Ferrari, 2006;GridiBennadji et al, 2008).…”

Section: Introductionmentioning

confidence: 98%

“…Interesting thermal decomposition studies of phyllosilicates such as muscovite, illite and chlorite, carried out on single crystals or on phases occurring in raw materials for ceramic production or in the ceramic micromass (consisting of material <10 mm in size, this term is used in preference to matrix) are also available in the relevant literature (Guggenheim et al, 1987;Worden et al, 1992;Murad and Wagner, 1996;Kalinichenko et al, 1997;Mazzucato et al, 1999;Sanchez-Navas, 1999; Kloprogge and Frost, 2000;Cultrone et al, 2001;Rodriguez-Navarro et al, 2003;Viti et al, 2004;Devineau et al, 2006;Gualtieri and Ferrari, 2006;Gridi-Bennadji et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Thermal behaviour of ‘metamorphic vermiculite’ in Ca-rich ancient ceramic sherds and experimental ceramics

Rathossi¹,

Tsolis-Katagas²,

Katagas³

2010

Mineral. mag.

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A 'metamorphic vermiculite'-like phase was identified in Ca-rich ancient ceramic sherds from excavations in NW Peloponnese, Greece. Archaeometric investigations have shown that the raw materials used in the production of ancient ceramics were derived from local Plio-Pleistocene sediments. Analysis by X-ray diffraction and scanning electron microscopy-energy dispersive spectroscopy showed that 'metamorphic vermiculite' is a common constituent phase of these sediments occurring in three texturally different types: as interstratified white mica-chlorite and chloritevermiculite, and white mica-(white mica-chlorite) stacks. In an attempt to elucidate the thermal transformation of 'metamorphic vermiculite' present in the calcareous raw materials, we produced experimental ceramics made from these local raw materials and fired them at 700, 750, 850, 950 and 1050ºC in a static air furnace. The mixed-layered chlorite-vermiculite was transformed completely at 800ºC contributing to the formation of new high-T minerals. The two other types of 'metamorphic vermiculite' retain their original lath-like shape up to 1050ºC and only a few crystals show that they have undergone complete transformation at this temperature. In the latter crystals, numerous nanocrystals were formed sub-parallel to the former cleavages of 'metamorphic vermiculite' pseudomorphs, suggesting their contribution to the nucleation of high-T minerals (i.e. ferrian aluminian diopside, spinel, Fe oxides) by reactions with the available CaO. It is suggested that the firing conditions (i.e. maximum reaction temperature of 1050ºC, reaction time of 1 h, oxygen atmosphere) which promote disequilibrium reactions, and the greater contribution of the white mica constituent against chlorite in some of the initial structures of 'metamorphic vermiculite' may be responsible for the delay of its thermal decomposition at 1050ºC.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Thermal behaviour of ‘metamorphic vermiculite’ in Ca-rich ancient ceramic sherds and experimental ceramics

Rathossi¹,

Tsolis-Katagas²,

Katagas³

2010

Mineral. mag.

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“…The effect of high temperature on the electrical properties of micas is directly related to dehydration/dehydroxylation processes and the possible associated structural transformations, due to the existence in this type of phyllosilicates of structural water in the form of hydroxyls. The aforementioned processes occurring in micas at elevated temperatures have been investigated over the past years [11,[36][37][38][39][40][41]. Ashida et al [11] reported that the dehydroxylation of muscovite starts above 673 K by the diffusion of water molecules formed from structural hydroxyl ions, without any lattice destruction.…”

Section: Introductionmentioning

confidence: 99%

Complex Electrical Conductivity of Biotite and Muscovite Micas at Elevated Temperatures: A Comparative Study

2020

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The unique physicochemical, electrical, mechanical, and thermal properties of micas make them suitable for a wide range of industrial applications, and thus, the interest for these kind of hydrous aluminosilicate minerals is still persistent, not only from a practical but also from a scientific point of view. In the present work, complex impedance spectroscopy measurements were carried out in muscovite and biotite micas, perpendicular to their cleavage planes, over a broad range of frequencies (10−2 Hz to 106 Hz) and temperatures (473–1173 K) that have not been measured so far. Different formalisms of data representation were used, namely, Cole-Cole plots of complex impedance, complex electrical conductivity and electric modulus to analyze the electrical behavior of micas and the electrical signatures of the dehydration/dehydroxylation processes. Our results suggest that ac-conductivity is affected by the structural hydroxyls and the different concentrations of transition metals (Fe, Ti and Mg) in biotite and muscovite micas. The estimated activation energies, i.e., 0.33–0.83 eV for biotite and 0.69–1.92 eV for muscovite, were attributed to proton and small polaron conduction, due to the bound water and different oxidation states of Fe.

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True micas

Burzo¹

2007

Phyllosilicates

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The study of the kinetics and the mechanism of dehydroxylation in muscovite by ESR on Fe 3+

Cited by 13 publications

References 7 publications

Thermal behaviour of ‘metamorphic vermiculite’ in Ca-rich ancient ceramic sherds and experimental ceramics

Thermal behaviour of ‘metamorphic vermiculite’ in Ca-rich ancient ceramic sherds and experimental ceramics

Complex Electrical Conductivity of Biotite and Muscovite Micas at Elevated Temperatures: A Comparative Study

True micas

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