Structure and 119Sn Mossbauer-spectroscopic characterization of BaRhSn2

被引：0

作者：

Reimann, Maximilian Kai ^{[1
]}

Koldemir, Aylin ^{[1
]}

Block, Theresa ^{[1
]}

Koesters, Jutta ^{[1
]}

Tappe, Frank ^{[2
]}

Poettgen, Rainer ^{[1
]}

机构：

[1] Univ Munster, Inst Anorgan & Analyt Chem, Corrensstr 30, D-48149 Munster, Germany

[2] Hsch Hamm Lippstadt, Marker Allee 76-78, D-59063 Hamm, Germany

来源：

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES | 2023年 / 78卷 / 1-2期

关键词：

BaRhSn2; intermetallics; Mossbauer spectroscopy; MgCuAl2; type; stannide; LONSDALEITE NETWORKS; COORDINATION POLYMER; CRYSTAL-STRUCTURE; PD; STANNIDES; RH; TOPOLOGY; RHSN3; CA; SR;

D O I：

10.1515/znb-2022-0152

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

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](delta-) 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 Sn-119 Mossbauer spectrum. The tin atoms exhibit a higher s electron density which is expressed in an increased isomer shift of delta = 2.08(1) mm s(-1) as compared to the previously reported stannide CaRhSn2 with a three-dimensional [RhSn2](delta-) polyanionic network and delta = 1.96(4) mm s(-1).

引用

页码：37 / 42

页数：6

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