The Mössbauer Spectroscopy and Analytical Investigations of the Polycrystalline Compounds with General Formula Znx SnyCrz Se4
I. Jendrzejewska a, A. Hanc b, P. Zajdel c, A. Kita a, T. Goryczka b, E. Maciążek a and J. Mrzigod a a Institute of Chemistry, University of Silesia, Szkolna 9, 40-006 Katowice, Poland b Institute of Materials Science, University of Silesia, Bankowa 12, 40-007 Katowice, Poland c Department of Chemistry, University College of London, 20 Gordon Street, WC1H 0AJ London, UK
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Received: 08 06 2008
We present combined X-ray powder diffraction and Mössbauer 119Sn studies of polycrystalline compounds with a general formula ZnxSnyCrz Se4 (where x+y+z ≈3). The obtained single-phase compounds crystallize in the spinel cubic structure - Fd3m. Tin ions are found to occupy both tetrahedral and octahedral sublattices. On the contrary to the strong tetrahedral site preference energy of Sn, the presented data strongly suggest that the increase in lattice parameters with Sn doping is caused by Sn ions that incorporated into octahedral positions. A quadrupole and isomer shifts of 119Sn in (SnSe4)6- and (SnSe6)4- are also reported.
DOI: 10.12693/APhysPolA.114.1591
PACS numbers: 61.05.cp, 61.66.Fn, 75.50.Ee, 82.80.Ej