Inelastic neutron scattering on sodium aluminosilicate melts: sodium diffusion and intermediate range order

Florian Kargl; A. Meyer

doi:10.1016/j.chemgeo.2004.08.040

Inelastic neutron scattering on sodium aluminosilicate melts: sodium diffusion and intermediate range order

Florian Kargl, A. Meyer

Department of Physics

Technical University of Munich

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16 Citations (Scopus)

Abstract

The interplay of structure and mass transport in sodium aluminosilicate melts at temperatures up to 1600 K has been investigated with inelastic neutron scattering. We compare results of ion dynamics and elastic structure of ternary 3Na2O·Al2O3·12SiO2, 3Na2O·Al2O3·8SiO2, Na2O·Al2O3·6SiO2 and Na2O·Al2O3·4SiO2 with recent results of binary Na2O·3SiO2 and Na2O·2SiO2. Addition of alumina to the binary silicates leads to a decrease in sodium mobility. The prepeak in the elastic structure factor which appears in binary alkali silicates at 0.9 Å−1 and which is interpreted to reflect a network of Na diffusion channels decreases in intensity with increasing alumina content. We find no indication for a prepeak in the Na2O/Al2O3=1 samples. The addition of alumina is apparently disrupting the channel structure found in sodium silicates.

Original language	English
Pages (from-to)	165-172
Number of pages	8
Journal	Chemical Geology
Volume	213
Issue number	1-3
Early online date	22 Oct 2004
DOIs	https://doi.org/10.1016/j.chemgeo.2004.08.040
Publication status	Published - 15 Nov 2004

Keywords

sodium aluinosilicates
microscopic dynamics
neutron scattering
ternary silicates
melt
in situ

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http://hdl.handle.net/2160/1460

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title = "Inelastic neutron scattering on sodium aluminosilicate melts: sodium diffusion and intermediate range order",

abstract = "The interplay of structure and mass transport in sodium aluminosilicate melts at temperatures up to 1600 K has been investigated with inelastic neutron scattering. We compare results of ion dynamics and elastic structure of ternary 3Na2O·Al2O3·12SiO2, 3Na2O·Al2O3·8SiO2, Na2O·Al2O3·6SiO2 and Na2O·Al2O3·4SiO2 with recent results of binary Na2O·3SiO2 and Na2O·2SiO2. Addition of alumina to the binary silicates leads to a decrease in sodium mobility. The prepeak in the elastic structure factor which appears in binary alkali silicates at 0.9 {\AA}−1 and which is interpreted to reflect a network of Na diffusion channels decreases in intensity with increasing alumina content. We find no indication for a prepeak in the Na2O/Al2O3=1 samples. The addition of alumina is apparently disrupting the channel structure found in sodium silicates.",

keywords = "sodium aluinosilicates, microscopic dynamics, neutron scattering, ternary silicates, melt, in situ",

author = "Florian Kargl and A. Meyer",

note = "Kargl, Florian; Meyer, A., (2004) 'Inelastic neutron scattering on sodium aluminosilicate melts: sodium diffusion and intermediate range order', Chemical Geology 213(1-3) pp.165-172 RAE2008",

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T1 - Inelastic neutron scattering on sodium aluminosilicate melts: sodium diffusion and intermediate range order

AU - Kargl, Florian

AU - Meyer, A.

N1 - Kargl, Florian; Meyer, A., (2004) 'Inelastic neutron scattering on sodium aluminosilicate melts: sodium diffusion and intermediate range order', Chemical Geology 213(1-3) pp.165-172 RAE2008

PY - 2004/11/15

Y1 - 2004/11/15

N2 - The interplay of structure and mass transport in sodium aluminosilicate melts at temperatures up to 1600 K has been investigated with inelastic neutron scattering. We compare results of ion dynamics and elastic structure of ternary 3Na2O·Al2O3·12SiO2, 3Na2O·Al2O3·8SiO2, Na2O·Al2O3·6SiO2 and Na2O·Al2O3·4SiO2 with recent results of binary Na2O·3SiO2 and Na2O·2SiO2. Addition of alumina to the binary silicates leads to a decrease in sodium mobility. The prepeak in the elastic structure factor which appears in binary alkali silicates at 0.9 Å−1 and which is interpreted to reflect a network of Na diffusion channels decreases in intensity with increasing alumina content. We find no indication for a prepeak in the Na2O/Al2O3=1 samples. The addition of alumina is apparently disrupting the channel structure found in sodium silicates.

AB - The interplay of structure and mass transport in sodium aluminosilicate melts at temperatures up to 1600 K has been investigated with inelastic neutron scattering. We compare results of ion dynamics and elastic structure of ternary 3Na2O·Al2O3·12SiO2, 3Na2O·Al2O3·8SiO2, Na2O·Al2O3·6SiO2 and Na2O·Al2O3·4SiO2 with recent results of binary Na2O·3SiO2 and Na2O·2SiO2. Addition of alumina to the binary silicates leads to a decrease in sodium mobility. The prepeak in the elastic structure factor which appears in binary alkali silicates at 0.9 Å−1 and which is interpreted to reflect a network of Na diffusion channels decreases in intensity with increasing alumina content. We find no indication for a prepeak in the Na2O/Al2O3=1 samples. The addition of alumina is apparently disrupting the channel structure found in sodium silicates.

KW - sodium aluinosilicates

KW - microscopic dynamics

KW - neutron scattering

KW - ternary silicates

KW - melt

KW - in situ

U2 - 10.1016/j.chemgeo.2004.08.040

DO - 10.1016/j.chemgeo.2004.08.040

M3 - Article

VL - 213

SP - 165

EP - 172

JO - Chemical Geology

JF - Chemical Geology

IS - 1-3

ER -

Inelastic neutron scattering on sodium aluminosilicate melts: sodium diffusion and intermediate range order

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Keywords

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