Structure and 119Sn Mössbauer-spectroscopic characterization of BaRhSn2
Author:
Reimann Maximilian Kai1, Koldemir Aylin1, Block Theresa1, Kösters Jutta1, Tappe Frank2, Pöttgen Rainer1
Affiliation:
1. Institut für Anorganische und Analytische Chemie, Universität Münster , Corrensstrasse 30 , 48149 Münster , Germany 2. Hochschule Hamm-Lippstadt , Marker Allee 76–78, 59063 Hamm , Germany
Abstract
Abstract
The stannide BaRhSn2 was synthesized by induction melting of an arc-melted RhSn2 precursor compound with barium in a sealed tantalum ampoule. The structure of BaRhSn2 was refined from single-crystal X-ray diffractometer data: MgCuAl2 type, Cmcm, a = 437.56(4), b = 1242.35(10), c = 767.30(6) pm, wR2 = 0.0845, 469 F
2 values and 16 variables. The rhodium and tin atoms form a two-dimensional [RhSn2]
δ− polyanionic network with short Rh–Sn (273–274 pm) and Sn–Sn (303–312 pm) distances. The large barium atoms lead to a substantial orthorhombic distortion of the (lonsdaleite-related) tin substructure, forcing a break of the Sn–Sn bond in b direction. This change in the tin substructure is reflected in the 119Sn Mössbauer spectrum. The tin atoms exhibit a higher s electron density which is expressed in an increased isomer shift of δ = 2.08(1) mm s−1 as compared to the previously reported stannide CaRhSn2 with a three-dimensional [RhSn2]
δ− polyanionic network and δ = 1.96(4) mm s−1.
Publisher
Walter de Gruyter GmbH
Subject
General Chemistry
Reference51 articles.
1. Paetzold, P. Chemie – Eine Einführung; De Gruyter: Berlin, 2009. 2. Binnewies, M., Jäckel, M., Willner, H., Rayner-Canham, G. Allgemeine und Anorganische Chemie, 2. Auflage; Spektrum Verlag: Heidelberg, 2011. 3. Holleman, A. F., Wiberg, N. Anorganische Chemie, 103. Auflage; De Gruyter: Berlin, 2017. 4. Frondel, C., Marvin, U. B. Nature 1967, 217, 587–589; https://doi.org/10.1038/214587a0. 5. Hanneman, R. E., Strong, H. M., Bundy, F. P. Science 1967, 155, 995–997; https://doi.org/10.1126/science.155.3765.995.
|
|