Salzmann, CG, Murray, BJ and Shephard, JJ (2015) Extent of stacking disorder in diamond. Diamond and Related Materials, 59. pp. 69-72. ISSN 0925-9635
Abstract
Hexagonal diamond has been predicted computationally to display extraordinary physical properties including a hardness that exceeds cubic diamond. However, a recent electron microscopy study has shown that so-called hexagonal diamond samples are in fact not discrete materials but faulted and twinned cubic diamond. We now provide a quantitative analysis of cubic and hexagonal stacking in diamond samples by analysing X-ray diffraction data with the DIFFaX software package. The highest fractions of hexagonal stacking in materials previously referred to as hexagonal diamond are below 60%. The remainder of the stacking sequences is cubic. We show that the cubic and hexagonal sequences are interlaced in a complex way and that naturally occurring Lonsdaleite is not a simple physical mixture of cubic and hexagonal diamond. Instead, it is structurally best described as stacking disordered diamond. The future experimental challenge will be to prepare diamond samples beyond 60% hexagonality and towards the so far elusive ‘perfect’ hexagonal diamond.
Metadata
Item Type: | Article |
---|---|
Authors/Creators: |
|
Copyright, Publisher and Additional Information: | © 2015, Elsevier. This is an author produced version of a paper published in Diamond and Related Materials. Uploaded in accordance with the publisher's self-archiving policy. |
Keywords: | Diamond; Lonsdaleite; Diffraction; Stacking disorder; Memory effects |
Dates: |
|
Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst for Climate & Atmos Science (ICAS) (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 13 Jan 2016 13:17 |
Last Modified: | 26 Oct 2016 16:09 |
Published Version: | http://dx.doi.org/10.1016/j.diamond.2015.09.007 |
Status: | Published |
Publisher: | Elsevier |
Identification Number: | 10.1016/j.diamond.2015.09.007 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:93345 |