Hostname: page-component-84b7d79bbc-2l2gl Total loading time: 0 Render date: 2024-07-25T17:06:23.877Z Has data issue: false hasContentIssue false
  • English
  • Français

Identification of the Polytype-like Modifications of Ca3GeO5 by Powder Diffraction

Published online by Cambridge University Press:  10 January 2013

Yoshio Takeuchi  and
Fumito Nishi
Yoshio Takeuchi
Affiliation:
Mineralogical Institute, Faculty of Science, University of Tokyo, Hongo, Tokyo 113, Japan
Fumito Nishi
Affiliation:
Mineralogical Institute, Faculty of Science, University of Tokyo, Hongo, Tokyo 113, Japan
Get access Rights & Permissions [Opens in a new window]

Abstract

Features of the powder diffraction patterns of known polytype-like modifications of Ca3GeO5, such as 2H, 9R and 24R types, and a monoclinic polymorph have been studied by means of the patterns calculated based on their crystal structures. The result has provided keys to identify them when they coexist in the same synthetic product. Accounts have been given on the crystallographic features of the building layer and rules for layer stackings of the modifications in general. Any modification may then be constructed to predict its powder diffraction pattern.

Type
Research Article
Information
Powder Diffraction , Volume 1 , Issue 1 , March 1986 , pp. 44 - 49
Copyright
Copyright © Cambridge University Press 1986

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

Bigaré, M., Guinier, A., Mazières, C., Regourd, M.Yannaquis, N., Eysel, W., Hahn, Th. & Woermann, E. (1967). Amer. Ceram. Soc. 50, 609–619.CrossRefGoogle Scholar
Biokova, A. J., Toropov, N. A. & Vavilonova, V. T. (1967). Dokl. Akad. Nauk. SSSR 175, 654–657.Google Scholar
Boikova, A. I. & Domansky, A. I. (1974). Cem. Concr. Res. 4, 773–784.Google Scholar
Clark, C. M., Smith, D. K. & Johnson, G. G. (1973). A FORTRAN IV Program for Calculating X-ray Powder Diffraction Patterns — Version 5. Pennsylvania State University, University Park, PA.Google Scholar
Eysel, W. & Hahn, Th. (1967). Z. Kristallogr. 131, 40–59.Google Scholar
Guinier, A. (Chairman) (1984). Report of IUCr Ad-Hoc Committee on the Nomenclature of Disordered, Modulated and Polytype Structures. Acta Crystallogr. A40, 339–404.Google Scholar
JCPDS (1976). Joint Committee on Powder Diffraction Standards — International Centre for Diffraction Data, Swarthmore, PA.Google Scholar
Nishi, F. & Takeuchi, Y. (1983). Cryst. Soc. Japan Annual Meeting Abstr. 16B–5.Google Scholar
Nishi, F. & Takeuchi, Y. (1984a). Z. Kristallogr. 168, 197–212.Google Scholar
Nishi, F. & Takeuchi, Y. (1984b). Acta Crystallogr. C40, 730–733.Google Scholar
Nishi, F. & Takeuchi, Y. (1985a). Acta Crystallogr. In the press.Google Scholar
Nishi, F. & Takeuchi, Y. (1985b). In preparation.Google Scholar
Nishi, F., Takeuchi, Y. & Maki, I. (1985). Z. Kristallogr. In the press.Google Scholar
Smith, D. K. (1967). A revised program for calculating X-ray powder diffraction patterns: UCRL-5260, Lawrence Radiation Laboratory, Livermore, Calif.Google Scholar
Takeuchi, Y., Nishi, F. & Maki, I. (1984). Acta Crystallogr. A40, C215.Google Scholar