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- Title
The Stannides Nd<sub>3</sub>Pd<sub>5</sub>Sn<sub>5</sub>, Gd<sub>3</sub>Pd<sub>4.96(1)</sub>Sn<sub>5</sub>, and GdPdSn.
- Authors
Heying, Birgit; Rodewald, Ute Ch.; Pöttgen, Rainer
- Abstract
The stannides Nd3Pd5Sn5 and Gd3Pd4.96(1)Sn5 were obtained by arc-melting of the elements. Nd3Pd5Sn5 and Gd3Pd4.96(1)Sn5 crystallize with the monoclinic Sm3Pd4.95Sn5 type structure, space group C2/ m. Both structures were refined from single crystal diffractometer data: a = 1729.5(4), b = 454.51(8), c = 1428.2(3) pm, β = 99.71(2)°, wR2 = 0.0689, 2220 F2 values, 82 variables for Nd3Pd5Sn5 and a = 1712.2(2), b = 450.36(9) c = 1412.0(3) pm, β = 99.804(2)°, wR2 = 0.0526, 1834 F2 values, 83 variables for Gd3Pd4.96(1)Sn5. 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 [Pd5Sn5] δ- polyanionic networks, which leave cavities for the three crystallographically independent rare earth sites: RE1@Pd6Sn8, RE2@Pd7Sn8, and RE3@Pd6Sn9. 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 RE-Pd contacts. The Gd3Pd4.96(1)Sn5 crystal showed an adherent second domain, which consisted of GdPdSn: TiNiSi type, Pnma, a = 725.6(3), b = 461.3(3), c = 790.6(3) pm, wR2 = 0.0973, 431 F2 values, 20 variables.
- Subjects
PALLADIUM; GADOLINIUM; X-ray diffraction; SINGLE crystals; DIFFRACTOMETERS
- Publication
Zeitschrift für Anorganische und Allgemeine Chemie, 2015, Vol 641, Issue 2, p229
- ISSN
0044-2313
- Publication type
Article
- DOI
10.1002/zaac.201400414