Physical Chemistry Chemical Physics, volume 18, issue 6, pages 4617-4626

High-temperature X-ray diffraction and thermal expansion of nanocrystalline and coarse-crystalline acanthite α-Ag2S and argentite β-Ag2S

Publication typeJournal Article
Publication date2016-01-22
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor3.3
ISSN14639076, 14639084
Physical and Theoretical Chemistry
General Physics and Astronomy
Abstract
An in situ study of thermal expansion of polymorphic phases of coarse-crystalline and nanocrystalline silver sulfide - monoclinic acanthite α-Ag2S and cubic argentite β-Ag2S - has been carried out for the first time using the high-temperature X-ray diffraction method. The temperature dependencies of the unit cell parameters of acanthite and argentite in the interval of 300-623 K have been determined, and the thermal expansion coefficients of acanthite and argentite have been found. It is shown that the observed difference in the thermal expansion coefficients for nano- and coarse-crystalline acanthite is due to the small particle size of nanocrystalline silver sulfide leading to the growth of anharmonicity of atomic vibrations. It is established by differential thermal analysis that a reversible polymorphic acanthite-argentite phase transformation takes place at ∼449-450 K and the phase transformation enthalpy is equal to ∼3.7-3.9 kJ mol(-1).

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GOST Copy
Sadovnikov S. I. et al. High-temperature X-ray diffraction and thermal expansion of nanocrystalline and coarse-crystalline acanthite α-Ag2S and argentite β-Ag2S // Physical Chemistry Chemical Physics. 2016. Vol. 18. No. 6. pp. 4617-4626.
GOST all authors (up to 50) Copy
Sadovnikov S. I., Gusev A. I., Chukin A., Rempel A. High-temperature X-ray diffraction and thermal expansion of nanocrystalline and coarse-crystalline acanthite α-Ag2S and argentite β-Ag2S // Physical Chemistry Chemical Physics. 2016. Vol. 18. No. 6. pp. 4617-4626.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1039/c5cp07224g
UR - https://doi.org/10.1039/c5cp07224g
TI - High-temperature X-ray diffraction and thermal expansion of nanocrystalline and coarse-crystalline acanthite α-Ag2S and argentite β-Ag2S
T2 - Physical Chemistry Chemical Physics
AU - Sadovnikov, Stanislav I
AU - Chukin, A.V.
AU - Gusev, Aleksandr I.
AU - Rempel, Andrey
PY - 2016
DA - 2016/01/22 00:00:00
PB - Royal Society of Chemistry (RSC)
SP - 4617-4626
IS - 6
VL - 18
SN - 1463-9076
SN - 1463-9084
ER -
BibTex |
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BibTex Copy
@article{2016_Sadovnikov,
author = {Stanislav I Sadovnikov and A.V. Chukin and Aleksandr I. Gusev and Andrey Rempel},
title = {High-temperature X-ray diffraction and thermal expansion of nanocrystalline and coarse-crystalline acanthite α-Ag2S and argentite β-Ag2S},
journal = {Physical Chemistry Chemical Physics},
year = {2016},
volume = {18},
publisher = {Royal Society of Chemistry (RSC)},
month = {jan},
url = {https://doi.org/10.1039/c5cp07224g},
number = {6},
pages = {4617--4626},
doi = {10.1039/c5cp07224g}
}
MLA
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MLA Copy
Sadovnikov, Stanislav I., et al. “High-temperature X-ray diffraction and thermal expansion of nanocrystalline and coarse-crystalline acanthite α-Ag2S and argentite β-Ag2S.” Physical Chemistry Chemical Physics, vol. 18, no. 6, Jan. 2016, pp. 4617-4626. https://doi.org/10.1039/c5cp07224g.
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