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Expertize and diagnostics at the Russian State Depository for precious metals and gems
Название Nondestructive methods for research during expertize of platinum coins and jewelleries
Автор Goldshtrakh M. A., Obrezumov V. P., Zhitenko L. P., Buzin V. I.
Информация об авторе M. A. Gol'dshtrakh, Candidate of Chemistry Science, Chief Specialist; V. P. Obrezumov, Candidate of Engineering Science, Deputy Head of Department; L. P. Zhitenko, Candidate of Chemistry Science, Chief Expert; V. I. Buzin, Chief Expert; e-mail: expgokhr@yandex.ru; Gokhran of Russia.
Реферат
The results of research and expertize of jewelleries and coins, produced from platinum alloys, with methods of X-ray fluorescence analysis and hydrostatic weighing have been presented. The data about composition, homogeneity and density of platinum alloys are obtained. It has been established that platinum content in the examined Russian coins of Nickolas I period made 96-99% (mass.), while the main additive impurities are Ir (up to 2%), Fe (up to 2%), Cu (up to 0.5%), Rh and Pd (~0.1%). Alloy density of these coins constitutes 19.3-21.2 g/cm3. It is concluded about possibility of usage of the a.m. methods in the expertise of authenticity of the coins and other products.
Ключевые слова Platinum, coins, spectrometry, X-ray spectrometry analysis, minting, products, density.
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Language of full-text русский
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