Chapter 95 Dislocations in Minerals

David J. Barber, Hans Rudolf Wenk, Greg Hirth, David L. Kohlstedt

Research output: Chapter in Book/Report/Conference proceedingChapter

23 Scopus citations


Dislocations in minerals have a long history: The first images of dislocations ever seen were obtained by Seidentopf in 1905 on rocksalt (halite) with an optical microscope. Since then, and particularly after the development of ion thinning techniques in the early 1960s, dislocations in minerals have been studied in great detail by transmission electron microscopy. While diffraction contrast images of dislocations are similar in metals and minerals, the structures of most minerals are very complex and of low symmetry, which leads to their having a great variety of slip systems that change with temperature-pressure-strain rate conditions. Thus the identification of dislocations in rock-forming minerals and the analysis of their characteristics can be used to infer geological conditions during deformation. Recently much emphasis has been placed on the nature of dislocations in high-pressure phases that occur deep in the Earth. Here findings from transmission electron microscopy are combined with atomic scale modeling. This chapter provides an overview of early and modern work on dislocations in minerals and discusses applications to different mineral groups and their geologic significance.

Original languageEnglish (US)
Title of host publicationDislocations in Solids
Number of pages62
ISBN (Print)9780444534439
StatePublished - 2010

Publication series

NameDislocations in Solids
ISSN (Print)1572-4859

Bibliographical note

Funding Information:
P. Cordier supplied reference material and reviewed our draft; we thank him for the invaluable help. W.F. Müller and W. Skrotzki provided micrographs. HRW acknowledges support from NSF (EAR-0337006). We are also indebted to the Editor, John Hirth for thoughtful comments that helped improve the manuscript.


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