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X-ray powder diffraction study of cesium ammonium hexachlorotellurate [Cs0.86(NH4)0.14]2TeCl6

Published online by Cambridge University Press:  01 March 2012

R. Karray ,
A. Kabadou ,
A. Ben Salah  and
A. van der Lee
R. Karray
Affiliation:
Laboratoire des Sciences des Matériaux et d’Environnement, Faculté des Sciences de Sfax, 3018 Sfax, Tunisia
A. Kabadou
Affiliation:
Laboratoire des Sciences des Matériaux et d’Environnement, Faculté des Sciences de Sfax, 3018 Sfax, Tunisia
A. Ben Salah
Affiliation:
Laboratoire des Sciences des Matériaux et d’Environnement, Faculté des Sciences de Sfax, 3018 Sfax, Tunisia
A. van der Lee
Affiliation:
Institut Européen des Membranes (UMR 5635), Université de Montpellier II, cc 047, Place E. Montpellier, France
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Abstract

The crystal structure of cesium ammonium hexachlorotellurate [Cs0.86(NH4)0.14]2TeCl6, has been determined using X-ray powder diffraction techniques. At room temperature, the title compound crystallizes in the cubic space group Fm3m, with a lattice parameter a=10.470(17) Å. The Rietveld refinement of the structure led to final confidence factors Rp=0.0338 and Rwp=0.0487. The structure of [Cs0.86(NH4)0.14]2TeCl6 belongs to the large family of K2PtCl6-related structures. The H atoms of the ammonium group are orientated with its apex toward Te atoms as seen in the related compound (NH4)2SiF6. An IR spectroscopic study was performed to confirm the results of the diffraction method, notably concerning the presence of the ammonium group.

Keywords

Rietveld refinementX-ray powder diffractionthreefold disorderIR spectroscopy
Type
Technical Articles
Information
Powder Diffraction , Volume 21 , Issue 3 , September 2006 , pp. 225 - 228
Copyright
Copyright © Cambridge University Press 2006

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References

Boultif, A. and Louër, D. (2004). “Powder pattern indexing with the dichotomy method,” J. Appl. Crystallogr. JACGAR 10.1107/S0021889804014876 37, 724–731.CrossRefGoogle Scholar
Dimitropoulos, C., Pelzl, J., and Borsa, F. (1990). “2D NMR and 35Cl nuclear-quadrupole-resonance study of ammonium-ion motion and phase transitions in natural and deuterated (NH4)2TeCl6,” Phys. Rev. B PRBMDO 10.1103/PhysRevB.41.3914 41, 3914–3919.CrossRefGoogle ScholarPubMed
Engel, G. (1935). “Die kristallstrukturen einiger hexachlorokomplexsalze,” Z. Kristallogr. ZEKRDZ 90, 341–373.CrossRefGoogle Scholar
Hazell, A. C. (1966). “A reinvestigation of the crystal structure of diammonium hexachlorotellurate(IV), (NH4)2TeCl6,” Acta Chem. Scand. (1947-1973) ACSAA4 20, 165–169.CrossRefGoogle Scholar
Karray, R., Kabadou, A., Ciśařová, I., Ben Hassen, R., and Ben Salah, A. (2004). “Structure of rubidium-ammonium hexachlorotellurate [Rb−0.8(NH4)(0.2)](2)TeCl6 at room and low temperatures,” J. Alloys Compd. JALCEU 377, 85–90.CrossRefGoogle Scholar
Karray, R., Kabadou, A., Jarraya, S., and Ben Salah, A. (2006). “Super-protonic phase transition and fast ionic conductivity of Li+ in [Li0.2(NH4)0.8]2TeCl6,” Solid State Ionics SSIOD3 177, 89–93.CrossRefGoogle Scholar
Karray, R., Kabadou, A., Loukil, M., and Ben Salah, A. (2003). “Crystal structure of lithium ammonium hexachlorotellurate(IV), [Li0.2(NH4)0.8]2TeCl6,” Z. Kristallogr. — New Cryst. Struct. ZZZZZZ 218, 399–400.CrossRefGoogle Scholar
Lisher, E. J., Cowlam, N., and Gillott, L. (1979). “A neutron diffraction study of ammonium hexachlororhenate,” Acta Crystallogr., Sect. B: Struct. Crystallogr. Cryst. Chem. ACBCAR 10.1107/S0567740879005513 35, 1033–1038.CrossRefGoogle Scholar
Louër, D. and Louër, M. (1972). “Méthode d’essais et erreurs pour l’indexation automatique des diagrammes de poudre,” J. Appl. Crystallogr. JACGAR 10.1107/S0021889872009483 5, 271–275.CrossRefGoogle Scholar
Nakamoto, K. (1963). Infrared Spectra of Inorganic and Coordination Compound, 2nd. ed. (Wiley, New York), 543 pp.Google Scholar
Prager, M., Raaen, A. M., and Svare, I. (1983). “Tunnel splittings in ammonium hexachlorides,” J. Phys. C JPSOAW 10.1088/0022-3719/16/6/002 16, L181–L186.CrossRefGoogle Scholar
Rietveld, H. M. (1969). “A profile refinement method for nuclear and magnetic structures,” J. Appl. Crystallogr. JACGAR 10.1107/S0021889869006558 2, 65–71.CrossRefGoogle Scholar
Rodriguez-Carjaval, J. (1990). “XVth Congress of the International Union of Crystallography,” Proceedings of the Satellite Meeting on Powder Diffraction,Toulouse, p. 127.Google Scholar
Roisnel, T. (2001). Fullprof Rietveld - Juan Rodriguez-Carvajal and WinPlotr Interface.Google Scholar
Schlemper, E. O., Hamilton, W. C., and Rush, J. J. (1966). “Structure of cubic ammonium fluosilicate: Neutron-diffraction and neutron-inelastic-scattering studies,” J. Chem. Phys. JCPSA6 10.1063/1.1727071 44, 2499–2505.CrossRefGoogle Scholar
Young, R. A. and Wiles, D. B. (1982). “Profile shape functions in Rietveld refinements,” J. Appl. Crystallogr. JACGAR 10.1107/S002188988201231X 15, 430–438.CrossRefGoogle Scholar