A thermodynamic model for polymerized sodium aluminosilicate melts

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Autoren

  • Alexander G. Simakin
  • Vladimir O. Zavel'sky
  • Harald Behrens
  • Jaroslav Kucherinenko
  • Tamara Salova

Organisationseinheiten

Externe Organisationen

  • Russian Academy of Sciences (RAS)
  • RAS - Institute of Physiologically Active Compounds
  • Lomonosov Moscow State University
  • University of North Dakota
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Details

OriginalspracheEnglisch
Seiten (von - bis)243-250
Seitenumfang8
FachzeitschriftEuropean journal of mineralogy
Jahrgang17
Ausgabenummer2
PublikationsstatusVeröffentlicht - 29 Apr. 2005

Abstract

A simplified thermodynamic model is proposed assuming nepheline-like and trydimite-like structural units being major constituents of polymerized aluminosilicate melts. In the frame of the model, dissolution of albite in the melt can be described by the dissociation reaction AbL = NeL + QzL. Static 23Na NMR spectra recorded on glasses along the binary join Ab-Qz are consistent with the proposed structural units. The NMR spectra can be decomposed into two mixed (Lorentzian + Gaussian) components. The narrow line is comparable in chemical shift and width with the symmetric position of sodium in crystalline nepheline. The second much broader line is assigned to a more asymmetric albite-like environment. The proportions of both sites estimated from static NMR of glasses of the dry Ab-Qz binary are close to the calculated proportion in the melt at the glass transition. Using the new thermodynamic model, the liquidus of silica polymorphs in the system Ab-Qz can be described well by assuming non-ideal mixing of structural units in the melt with small interaction parameters.

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A thermodynamic model for polymerized sodium aluminosilicate melts. / Simakin, Alexander G.; Zavel'sky, Vladimir O.; Behrens, Harald et al.
in: European journal of mineralogy, Jahrgang 17, Nr. 2, 29.04.2005, S. 243-250.

Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review

Simakin, AG, Zavel'sky, VO, Behrens, H, Kucherinenko, J & Salova, T 2005, 'A thermodynamic model for polymerized sodium aluminosilicate melts', European journal of mineralogy, Jg. 17, Nr. 2, S. 243-250. https://doi.org/10.1127/0935-1221/2005/0017-0243
Simakin, A. G., Zavel'sky, V. O., Behrens, H., Kucherinenko, J., & Salova, T. (2005). A thermodynamic model for polymerized sodium aluminosilicate melts. European journal of mineralogy, 17(2), 243-250. https://doi.org/10.1127/0935-1221/2005/0017-0243
Simakin AG, Zavel'sky VO, Behrens H, Kucherinenko J, Salova T. A thermodynamic model for polymerized sodium aluminosilicate melts. European journal of mineralogy. 2005 Apr 29;17(2):243-250. doi: 10.1127/0935-1221/2005/0017-0243
Simakin, Alexander G. ; Zavel'sky, Vladimir O. ; Behrens, Harald et al. / A thermodynamic model for polymerized sodium aluminosilicate melts. in: European journal of mineralogy. 2005 ; Jahrgang 17, Nr. 2. S. 243-250.
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Download

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AU - Simakin, Alexander G.

AU - Zavel'sky, Vladimir O.

AU - Behrens, Harald

AU - Kucherinenko, Jaroslav

AU - Salova, Tamara

PY - 2005/4/29

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N2 - A simplified thermodynamic model is proposed assuming nepheline-like and trydimite-like structural units being major constituents of polymerized aluminosilicate melts. In the frame of the model, dissolution of albite in the melt can be described by the dissociation reaction AbL = NeL + QzL. Static 23Na NMR spectra recorded on glasses along the binary join Ab-Qz are consistent with the proposed structural units. The NMR spectra can be decomposed into two mixed (Lorentzian + Gaussian) components. The narrow line is comparable in chemical shift and width with the symmetric position of sodium in crystalline nepheline. The second much broader line is assigned to a more asymmetric albite-like environment. The proportions of both sites estimated from static NMR of glasses of the dry Ab-Qz binary are close to the calculated proportion in the melt at the glass transition. Using the new thermodynamic model, the liquidus of silica polymorphs in the system Ab-Qz can be described well by assuming non-ideal mixing of structural units in the melt with small interaction parameters.

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