Presently, deterioration of glass beads is a significant problem in conservation and restoration of beaded exhibits in museums. Glass corrosion affects nearly all kinds of beads but cloudy blue-green ones are more than others subjected to disastrous destruction. However, physical and chemical mechanisms of this phenomenon have not been understood thus far. This article presents results of a study of elemental and phase composition of glass of the blue-green beads of the 19th century obtained from exhibits kept in Russian museums. Using scanning electron microscopy, X-ray microanalysis, and X-ray powder analysis, we have detected and investigated Sb-rich microinclusions in the glass matrix of these beads and found them to be micro crystallites of KSbSiO5. These crystallites were not detected in other kinds of beads which are much less subjected to corrosion than the blue-green ones and deteriorate in a different way. We believe that individual precipitates of KSbSiO5 and especially their clusters play a major role in the blue-green bead deterioration giving rise to slow internal corrosion of the bead glass.
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7 January 2017
Research Article|
January 05 2017
KSbOSiO4 microcrystallites as a source of corrosion of blue-green lead-potassium glass beads of the 19th century
T. V. Yuryeva;
1
The State Research Institute for Restoration, Ministry of Culture of Russian Federation
, Bldg 1, 44 Gastello Street, Moscow 107114, Russia
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I. B. Afanasyev;
I. B. Afanasyev
2
Forensic Science Center, Ministry of the Interior of the Russian Federation
, 5 Zoya and Alexander Kosmodemyansky Street, Moscow 125130, Russia
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E. A. Morozova;
1
The State Research Institute for Restoration, Ministry of Culture of Russian Federation
, Bldg 1, 44 Gastello Street, Moscow 107114, Russia
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I. F. Kadikova;
I. F. Kadikova
1
The State Research Institute for Restoration, Ministry of Culture of Russian Federation
, Bldg 1, 44 Gastello Street, Moscow 107114, Russia
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V. S. Popov;
V. S. Popov
3
Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences
, 31 Leninsky Avenue, Moscow 119071, Russia
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V. A. Yuryev
4
A. M. Prokhorov General Physics Institute, Russian Academy of Sciences
, 38 Vavilov Street, Moscow 119991, Russia
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a)
Electronic mail: tvyur@kapella.gpi.ru
b)
Also at Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, Russia.
c)
Electronic mail: vyuryev@kapella.gpi.ru. URL: http://www.gpi.ru/eng/staff_s.php?eng=1&id=125
J. Appl. Phys. 121, 014902 (2017)
Article history
Received:
September 08 2016
Accepted:
December 21 2016
Citation
T. V. Yuryeva, I. B. Afanasyev, E. A. Morozova, I. F. Kadikova, V. S. Popov, V. A. Yuryev; KSbOSiO4 microcrystallites as a source of corrosion of blue-green lead-potassium glass beads of the 19th century. J. Appl. Phys. 7 January 2017; 121 (1): 014902. https://doi.org/10.1063/1.4973576
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