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Stability of Ionic Tin(II) in a Chloride Fluoride Matrix: the Unexpected Ba1−xSrxCl1+yF1−y Solid Solution Crystallizing in the Bacif Structure

Published online by Cambridge University Press:  15 February 2011

Georges Denes ,
Julie Bratigny ,
David Le Roux  and
Abdualhafeed Muntasar
Georges Denes
Affiliation:
Laboratory of Solid State Chemistry and Mössbauer spectroscopy, Laboratories for Inorganic Materials, Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec, H3G 1M8, Canada, gdenes@vax2.concordia.ca
Julie Bratigny
Affiliation:
Laboratory of Solid State Chemistry and Mössbauer spectroscopy, Laboratories for Inorganic Materials, Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec, H3G 1M8, Canada, gdenes@vax2.concordia.ca
David Le Roux
Affiliation:
Laboratory of Solid State Chemistry and Mössbauer spectroscopy, Laboratories for Inorganic Materials, Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec, H3G 1M8, Canada, gdenes@vax2.concordia.ca
Abdualhafeed Muntasar
Affiliation:
Laboratory of Solid State Chemistry and Mössbauer spectroscopy, Laboratories for Inorganic Materials, Department of Chemistry and Biochemistry, Concordia University, Montreal, Quebec, H3G 1M8, Canada, gdenes@vax2.concordia.ca
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Abstract

We have prepared a wide Ba1−xSrxCl1+yF1−y solid solution (0<x<0.25, −0.20<y<0.20) that has the BaClF structure without any sign of lattice distortion or ordering of the cations or of the anions other than that already present in BaClF. Furthermore, 119Sn Mossbauer spectroscopy shows that tin(ll) is present in this material in the form of Sn2+ ions instead of being covalently bonded Sn(ll) with a stereoactive lone pair of electrons, which is nearly always the case when the anions are small and strongly electronegative, like for F and Cl. The tin situation is similar to that observed in SnCl2.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 453: Symposium R – Solid State Chemistry of Inorganic Materials , 1996 , 177
Copyright
Copyright © Materials Research Society 1997

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References

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