X-Ray Powder Diffraction Study of Atomic Structure of Nanocrystalline SiC and Diamond Materials

Ewa Grzanka; Bogdan F. Palosz; Stanislaw Gierlotka; Svetlana Stelmakh; Roman Pielaszek; Ulrich Bismayer; J. Neuefeind; P. Jóvári; W. Palosz

doi:10.4028/www.scientific.net/MSF.443-444.39

Paper Titles

Completion of Crystal Structure with Polyhedral Coordination: A New Procedure
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Calibration of Diffractometers: A Test Method to Monitor the Performance of Instruments
p.27

Standardisation of X-Ray Powder Diffraction Methods
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FOX: Modular Approach to Crystal Structure Determination from Powder Diffraction
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X-Ray Powder Diffraction Study of Atomic Structure of Nanocrystalline SiC and Diamond Materials
p.39

Quantitative Phase Analysis Using the Rietveld Method - Estimates of Possible Problems Based on Two Interlaboratory Comparisons
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Planar Disorder Analysis from Powder Diffraction Pattern
p.51

New Method for Estimation of the Magnesium Fraction in Magnesian Calcite
p.55

XRD Study of the Nacrite/CsCl/H₂O Intercalation Complex
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HomeMaterials Science ForumMaterials Science Forum Vols. 443-444X-Ray Powder Diffraction Study of Atomic Structure...

X-Ray Powder Diffraction Study of Atomic Structure of Nanocrystalline SiC and Diamond Materials

Abstract:

A considerable fraction of atoms in nanosize particles is at the grain surface (due to the small size of the crystals). We assume that the surface atoms form a separate structural phase relative to the bulk of the grain (the core). Therefore, one set of the lattice parameters characterizing a nanocrystal may be inadequate for a unique description of its structure. An alternative evaluation of diffraction data of nanocparticles, based on the 'apparent lattice parameter' is proposed. Based on this new methodology it is shown that real nano-crystals constitiute a complex, more than a one-uniform-phase structure.

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Periodical:

Materials Science Forum (Volumes 443-444)

Pages:

39-44

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.443-444.39

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Online since:

January 2004

Authors:

Ewa Grzanka, Bogdan F. Palosz, Stanislaw Gierlotka, Svetlana Stelmakh, Roman Pielaszek, Ulrich Bismayer, J. Neuefeind, P. Jóvári, W. Palosz

Keywords:

Diffraction, Nanocrystal, Surface Structure

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References

[1] B. Palosz, E. Grzanka , S. Gierlotka, S. Stel’makh, R. Pielaszek, W. Lojkowski, U. Bismayer, J. Neuefeind, H.P. Weber, W. Palosz, Phase Transitions, (2002) in press.

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DOI: 10.4028/www.scientific.net/ddf.208-209.187

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