Redetermination Of Lattice Parameters, Densities And Thermal Expansion Coefficients Of Silver And Gold, And The Perfection Of Their Structures

Abstract

The redtermined lattice parameters of Ag and Au are as follows:a25=4.08626±0.00004 and 4.07894±0.00005 Å, resp., including the refraction correction of 0.00035; the densities are d25=10.4976±0.0003 and 19.2779±0.0018 gcm-3, resp. The thermal expansion coefficients between 10 and 65°C are: αAg=18.73·10-6 and αAu=13.4·10-6°C-1. Both metals showed a perfect structure (within the error limits). A complete recovery of the 99.999% pure metals from the consequences of cold work (filing) occurred at room temperature in about 24 hr. (Ag) and in 5 days (Au). The displacement of atoms is strongly retarded by the presence of impurities. A silver crystal quenched just below the melting point showed a lower density which increased during the heat treatment. This behavior can be explained by vacancies diffusing out of the crystal. © 1971 Springer-Verlag.

Department(s)

Materials Science and Engineering

International Standard Serial Number (ISSN)

1434-4475; 0026-9247

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2023 Springer, All rights reserved.

Publication Date

01 Sep 1971

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