Crystal Structure and Properties of the Titanium Stannide Ti<sub>2</sub>Sn<sub>3</sub>

Zeitschrift fur Naturforschung - Section B Journal of Chemical Sciences - Tập 55 Số 5 - Trang 425-430 - 2000
Bernd Künnen1, Wolfgang Jeitschko2, Gunter Kotzyba3, Bernd D. Mosel4
1Anorganisch-Chemisches Institut, Universität Münster, Wilhelm-K lemm-Straße 8, D-48149 Münster, Germany
2Anorganisch-Chemisches Institut, Universität Münster, Wilhelm -Klemm-Straße 8, D-48149 Münster, Germany
3Anorganisch-Chemisches Institut, niversität Münster, Wilhelm -Klemm-Straße 8, D-48149 Münster, Germany
4Institut für Physikalische Chemie, Universität Münster, Schlossplatz 7, D-48149 Münster, Germany

Tóm tắt

The recently reported binary stannide Ti2Sn3 is confirmed. Its structure was determined from single-crystal X-ray diffractometer data: Cmca, a = 596.7(4), b = 1995(2), c = 701.3(4) pm , Z = 8, R = 0.027 for 817 structure factors and 30 variable parameters. The crystal structure is compared to that of V2GaSn2, which has the same space group symmetry and atomic positions. The Ga atoms of V2GaSn2 occupy those Sn positions of Ti2Sn3 which have the smaller coordination number. The two different titanium atoms of Ti2Sn3 have 11 neighbors of which 3 and 4, respectively, are titanium atoms. The three different tin atoms have 5 titanium with 8 or 10 additional tin neighbors. They show only a slightly broadened but unresolved 119Sn Mössbauer signal with an isomer shift reflecting the high tin content of this intermetallic compound and a relatively large quadrupole splitting of 2.10 mm·s-1. Ti2Sn3 is a good metallic conductor and a Pauli paramagnet.

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Zeitschrift fur Naturforschung - Section B Journal of Chemical Sciences

Tập 55 Số 5

425-430

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