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A HRTEM study of defects in silver-doped galena

Published online by Cambridge University Press:  05 July 2018

A. Pring  and
T. B. Williams
A. Pring
Affiliation:
Department of Mineralogy, South Australian Museum, North Terrace, Adelaide, South Australia 5000, Australia
T. B. Williams
Affiliation:
C.S.I.R.O. Division of Materials Science and Technology, Locked Bag 33, Clayton, Victoria 3168, Australia
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Abstract

Synthetic Ag-doped PbS samples were Ar ion beam milled and examined by HRTEM. The silver was found to aggregate in inclusions which have no crystallographic relationship to the PbS host, rather than forming crystallographic defects. The Ag2S inclusions are 500 Å in diameter or larger. The limit of Ag substitution into PbS in solid solution in the absence of Bi or Sb is less than 0.1 mol %. The ion beam milling process introduced a large number of small dislocations in both Ag-doped and pure PbS specimens. These dislocations are thought to be formed through coalescences of point defects.

Keywords

galenasilverHRTEMion beam milling
Type
Mineralogy
Information
Mineralogical Magazine , Volume 58 , Issue 392 , September 1994 , pp. 455 - 459
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1994

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Footnotes

*

Present address JASCO International Co. Ltd., 4-21 Sennin-cho 2-chome, Hachioji City 193, Japan

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