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High-resolution X-ray diffraction study of the chromite (Mg0.60Fe0.402+)(Al0.39Cr1.50Fe0.093+)O4

Published online by Cambridge University Press:  10 January 2013

T. R. C. Fernandes  and
J. I. Langford
T. R. C. Fernandes
Affiliation:
Institute of Mining Research, University of Zimbabwe, P. O. Box MP167, Mount Pleasant, Harare, Zimbabwe
J. I. Langford
Affiliation:
School of Physics & Astronomy, University of Birmingham, Birmingham B15 2TT, United Kingdom
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Abstract

As part of a study by high-resolution X-ray diffraction of chrome ores from the Great Dyke, Zimbabwe, powder data are reported for a well-crystallized ferroan magnesiochromite spinel, in which some Cr had been replaced by Al. Data were obtained by using CuKα1 radiation, with an incident beam focusing monochromator to eliminate the Kα2 component. The cell parameter is a0=8.3123(2) Å, the figures of merit are M17=383 and F17=182 (0.0055, 17) and the calculated density is 4.50(5) Mgm−3. A small amount of sample broadening was observed and this was attributed to a mean crystallite size of 259(1) nm. © 1997 International Center for Diffraction Data.

Keywords

chromitespinelhigh-resolution X-ray powder diffractioncell parameterline profile analysis
Type
Research Article
Information
Powder Diffraction , Volume 13 , Issue 2 , June 1998 , pp. 96 - 99
Copyright
Copyright © Cambridge University Press 1998

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References

Bish, D. L., and Reynolds, R. C. Jr. (1989). “Sample preparation in X-ray diffraction,” in Reviews in Mineralogy, Modern Powder Diffraction, Vol. 20, edited by D. L. Bish and J. E. Post (Mineralogical Society of America, Washington), pp. 73–99.Google Scholar
Fernandes, T. R. C. (1985). “Chromite Mineralogy and Metallurgical Behaviour,” in Proceedings of MINTEK 50 International Conference on Mineral Science and Technology, edited by C. F. Houghton (Council for Mineral Technology, Randburg, South Africa), Vol. 2, pp. 913–922.Google Scholar
Fernandes, T. R. C., Lee, W. E., and Mitchell, T. E. (1994). “Microstructural Aspects of the Reduction of Zimbabwe Chromite to High Carbon Ferrochromium,” Trans. Inst. Min. Metall.(Sect. C: Mineral Process. Extr. Metall.)103,C177-87.Google Scholar
Langford, J. I. (1971). “Powder pattern programs,” J. Appl. Crystallogr. 4, 259–260.CrossRefGoogle Scholar
Langford, J. I. (1978). “A rapid method for analyzing the breadths of diffraction and spectral lines using the Voigt function,” J. Appl. Crystallogr. 11, 10–14.CrossRefGoogle Scholar
Langford, J. I. (1992). “The use of the Voigt function in determining microstructral properties from diffraction data by means of pattern decomposition,” in Accuracy in Powder Diffraction II, edited by E. Prince and J. K. Stalick, NIST Special Publication No. 846 (US Dept. of Commerce, Gaithersburg, MD), pp. 110–126.Google Scholar
Nusinovici, J., and Rehfeldt-Oskierski, A. (1990). “DIFFRAC-AT search/match and profile fitting programs,” Collected Abstracts, IUCr Powder Diffraction Satellite Meeting, Toulouse, France, 16–19 July 1990 (unpublished), pp. 315–316.Google Scholar
Slatter, D. de L. (1978). “The physical properties of Rhodesian chromium ores and their significance in ferrochromium production,” Inst. Min. Res. Rep. No. 28, University of Zimbabwe (unpublished), pp. 75.Google Scholar
Slatter, D. de L. (1980). “The composition of Zimbabwean chromium ores and the derivation of physico-chemical ratings for smelting the ores to high-carbon ferrochromium,” Inst. Min. Res. Rep. C193, University of Zimbabwe (unpublished), pp. 79.Google Scholar
Slatter, D. de L. (1981). “The effects of chemical composition upon the reducibility of Zimbabwean chromium ores,” Inst. Min. Res. Rep. No. 43, University of Zimbabwe (unpublished), pp. 39.Google Scholar
Swanson, H. E., Morris, M. C., and Evans, E. H. (1966). “Cell determination for internal standards,” NBS Monograph No. 25, Sec. 4, p. 3–4.Google Scholar