The Stannides Nd3Pd5Sn5, Gd3Pd4.96(1)Sn5, and GdPdSn1. Issue 2 (7th November 2014)

• Record Type: Journal Article
• Authors: Heying, Birgit; Rodewald, Ute Ch.; Pöttgen, Rainer
• Is Part Of: Zeitschrift für anorganische und allgemeine Chemie. Volume 641:Issue 2(2015)
• Page Start: 229
• Page End: 233
• Publication Date: 2014-11-07
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1002/zaac.201400414
• Languages: English
• ISSNs: 0044-2313

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p> The stannides Nd<sub>3</sub>Pd<sub>5</sub>Sn<sub>5</sub> and Gd<sub>3</sub>Pd<sub>4.96(1)</sub>Sn<sub>5</sub> were obtained by arc‐melting of the elements. Nd<sub>3</sub>Pd<sub>5</sub>Sn<sub>5</sub> and Gd<sub>3</sub>Pd<sub>4.96(1)</sub>Sn<sub>5</sub> crystallize with the monoclinic Sm<sub>3</sub>Pd<sub>4.95</sub>Sn<sub>5</sub> type structure, space group <italic>C</italic>2/<italic>m</italic>. Both structures were refined from single crystal diffractometer data: <italic>a</italic> = 1729.5(4), <italic>b</italic> = 454.51(8), <italic>c</italic> = 1428.2(3) pm, <italic>β</italic> = 99.71(2)°, <italic>wR</italic><sub>2</sub> = 0.0689, 2220 <italic>F</italic><sup>2</sup> values, 82 variables for Nd<sub>3</sub>Pd<sub>5</sub>Sn<sub>5</sub> and <italic>a</italic> = 1712.2(2), <italic>b</italic> = 450.36(9) <italic>c</italic> = 1412.0(3) pm, <italic>β</italic> = 99.804(2)°, <italic>wR</italic><sub>2</sub> = 0.0526, 1834 <italic>F</italic><sup>2</sup> values, 83 variables for Gd<sub>3</sub>Pd<sub>4.96(1)</sub>Sn<sub>5</sub>. The Pd2 site of the gadolinium compound showed site occupancy of only 95.8(7) %. The palladium and tin atoms in these monoclinic stannides build up complex three‐dimensional [Pd<sub>5</sub>Sn<sub>5</sub>]<sup><italic>δ</italic></sup><sup>–</sup> polyanionic networks, which leave cavities for the three crystallographically independent rare earth sites: <italic>RE</italic>1@Pd<sub>6</sub>Sn<sub>8</sub>, <italic>RE</italic>2@Pd<sub>7</sub>Sn<sub>8</sub>, and <italic>RE</italic>3@Pd<sub>6</sub>Sn<sub>9</sub>. The networks are stabilized by Pd–Sn, Pd–Pd as well as Sn–Sn bonding. The rare earth atoms bind to the networks via shorter <italic>RE</italic>–Pd contacts. The Gd<sub>3</sub>Pd<sub>4.96(1)</sub>Sn<sub>5</sub> crystal showed an adherent second domain, which consisted of GdPdSn: TiNiSi type, <italic>Pnma</italic>, <italic>a</italic> = 725.6(3), <italic>b</italic> = 461.3(3), <italic>c</italic> = 790.6(3) pm, <italic>wR</italic><sub>2</sub> = 0.0973, 431 <italic>F</italic><sup>2</sup> values, 20 variables.</p> </abstract>