Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-12-01T05:06:11.312Z Has data issue: false hasContentIssue false
  • English
  • Français

Study of Garnets by ALCHEMI

Published online by Cambridge University Press:  02 July 2020

János L. Lábár ,
Lajos Tόth ,
István Dόdony  and
Jerzy Morgiel
János L. Lábár
Affiliation:
Research Institute for Technical Physics and Materials Science, H-l 121 Budapest, Konkoly-Thegeu. 29-33, Hungary
Lajos Tόth
Affiliation:
Research Institute for Technical Physics and Materials Science, H-l 121 Budapest, Konkoly-Thegeu. 29-33, Hungary
István Dόdony
Affiliation:
Department of Mineralogy, Eötvös Lόránd University, Budapest, Rákόczi u. 4, Hungary
Jerzy Morgiel
Affiliation:
Institute of Metallurgy and Materials Science, ul., Reymonta 25, PL-30059 Krakow, Poland
Get access

Abstract

Garnets were one of the first materials in which an occupation of separate lattice sites by different atomic species was determined with an ALCHEMI technique proposed by Spence and Tafto in l982. The reason of so much interest in this material was twofold, i.e. first its known high sensitivity of X-ray generation depending on orientation especially in the axial orientation and second its complicated crystal structure allowing different atomic arrangements in the unit cell depending on its chemical composition. The dodecahedral (X), octahedral (Y) and tetrahedral (Z) sites between the relatively large oxygen atoms can be filled with a variety of small cations in accordance with the formula X3Y2Z3O12. Partial substitution of one cation with another is common in this structure. The results presented in the previous literature indicated that ALCHEMI can only separate the Y-sites from the sum of the other two (X+Z), while the latter has to remain unresolved.

Type
Atom Location by Channeling Enhancement of X-Ray and EELS Signals (ALCHEMI)(organized by J.Spence)
Information
Microscopy and Microanalysis , Volume 7 , Issue S2: Proceedings: Microscopy & Microanalysis 2001, Microscopy Society of America 59th Annual Meeting, Microbeam Analysis Society 35th Annual Meeting, Long Beach, California August 5-9, 2001 , August 2001 , pp. 358 - 359
Copyright
Copyright © Microscopy Society of America 2001

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1Krishnan, KM, Rez, P and Thomas, G, Acta Crystallogr. B41, 396 (1985)Google Scholar
2Tafto, J and Spence, JCH, Science 218, 49 (1982)CrossRefGoogle Scholar
3Otten, MT, Philips Opt. Bull. 126, 21 (1989)Google Scholar
4Otten, MT and Buseck, PR, Ultramicroscopy 23, 151 (1987)CrossRefGoogle Scholar
5Balboni, R, Frabboni, S, Rinaldi, R and Spigarelli, S., Mikrochim. Acta 114/115, 187 (1994)CrossRefGoogle Scholar
6Labar, JL, Appl. Phys. Lett. 75, 70 (1999)CrossRefGoogle Scholar
7Spence, JCH and Tafto, J, J. Microsc. 130, 147 (1983)CrossRefGoogle Scholar
8Stadelmann, P, Ultramicroscopy 21,131 (1987)CrossRefGoogle Scholar