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Crystallographic study of the mineral ferroan clinozoisite from three localities of Northern Greece

Published online by Cambridge University Press:  10 January 2013

A. C. Stergiou  and
D. K. Gioureli
A. C. Stergiou*
Affiliation:
Applied Physics Laboratory, Department of Physics, Aristotle University of Thessaloniki, 54006 Thessaloniki, Greece
D. K. Gioureli
Affiliation:
Applied Physics Laboratory, Department of Physics, Aristotle University of Thessaloniki, 54006 Thessaloniki, Greece
*
a) Author to whom correspondence should be addressed.
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Abstract

Samples of the mineral ferroan clinozoisite from three localities of Greece (Paranesti-Drama, Xanthi, and Petritsi-Serres), with chemical formula Ca2Al3−xFexSi3O13H (x=0.55, 0.58, and 0.46, respectively), were measured by X-ray powder diffraction, using CoKa radiation. The PDF and bibliographic information were used in order to identify additional phases in the samples. Refinement combined with PDF resulted in the following: ferroan clinozoisite (100%) for the first sample, ferroan clinozoisite (97%) and malladrite (3%) for the second one, and ferroan clinozoisite (75%), clinopyroxene (20%), and malladrite (5%) for the third one. The crystal structure refinement was performed by the “Powder profile analysis (Rietveld)”. P21/m space group was chosen for the ferroan clinozoisite phases, with unit cell constants a=8.8919(5) Å, b=5.6260(3) Å, c=10.1570(6) Å, β=115.418(3)° (Paranesti), a=8.8944(7) Å, b=5.6394(4) Å, c=10.1626(8) Å, β=115.400(5)° (Xanthi) a=8.8965(8) Å, b=5.6372(4) Å, c=10.1595(9) Å, β=115.411(6)° (Petritsi) almost similar for the three samples, while the final R-p factors were 0.069, 0.064, and 0.063, respectively.

Type
Research Article
Information
Powder Diffraction , Volume 13 , Issue 4 , December 1998 , pp. 222 - 226
Copyright
Copyright © Cambridge University Press 1998

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References

Belov, N. V., and Rumanova, J. M. (1953). “The crystal structure of epidote Ca 2Al 2FeSi 3O 12(OH),” Dokl. Akad. Nauk SSSR. 89, 853–856.[Abstr. In Struct. Rep. 17, 567–568 (1953)].Google Scholar
Belov, N. V., and Rumanova, J. M. (1954). “The crystal structure of epidote,” Trudy Inst. Kristallogr., Akad. Nauk SSSR. 9, 103–164. [Abstr. In Struct. Rep. 18 544–545 (1954)].Google Scholar
Bonazzi, P., and Menchetti, S. (1995).“Monoclinic members of the epidote group: effects of the Al⇋Fe 3+⇋Fe 2+ substitution and of the entry of REE 3+,” Mineralogy and Petrology 53, 133–153.CrossRefGoogle Scholar
Cameron, M., Sueno, S., Prewitt, C. T., and Papike, J. J. (1973). “High-temperature crystal chemistry of acmite, diopside, hedenbergite, jadeite, spodumene and ureyite,” Am. Mineral. 58, 594–618.Google Scholar
Comodi, P., and Zanazzi, P. F. (1997). “The pressure behaviour of clinozoisite and zoisite: An X-ray diffraction study,” Am. Mineral. 82, 61–68.CrossRefGoogle Scholar
Dollase, W. A. (1968). “Refinement and comparison of the structures of zoisite and clinozoisite,” Am. Mineral. 53, 1882–1898.Google Scholar
Dollase, W. A. (1971). “Refinement of the crystal structures of epidote, allanite and hancockite,” Am. Mineral. 56, 447–464.Google Scholar
Gabe, E. J., Pontheine, J. C., and Whitlow, S. H. (1973). “A reinvestigation of the epidote structure; Conformation of the iron location,” Am. Mineral. 58, 218–223.Google Scholar
Ito, T. (1950). “X-ray studies on polymorphism,”Maruzen, Tokyo, 50 pp.,Abstr. In Struct. Rep. 13, 375–376(1950).Google Scholar
Ito, T., Morimoto, N., and Sadanaga, R. (1954). “On the structure of epidote,” Acta Crystallogr. 7, 53–59.CrossRefGoogle Scholar
Kvick, A., Pluth, J., Richardson, J., and Smith, J. (1988). “The ferric ion distribution and hydrogen bonding in epidote: a neutron diffraction study at 15K,” Acta Crystallogr. Sect. B: Struct. Sci. 44, 351–355.CrossRefGoogle Scholar
Stergiou, A. C., Rentzeperis, P. J., and Sklavounos, S. (1987). “Refinement of the crystal structure of a medium iron epidote,” Z. Kristallogr. 178, 297–305.CrossRefGoogle Scholar
Stergiou, A.C. (1996). DBWSPLOT program for ploting the Rietveld's refinement results. Thessaloniki, Greece.Google Scholar
Young, R. A. (1995). “DBWS-9411 program for Rietveld refinement,” J. Appl. Crystallogr. 28, 66–67.CrossRefGoogle Scholar
Zalkin, A., Forrester, J. D., and Templeton, D. H. (1967). “The crystal structure of sodium fluosilicate,” Acta Crystallogr. 1, 1948–1953.Google Scholar