A novel rare earth zinc germanide, Yb2Zn3Ge 3.1; crystal structure and physical properties
- Autor(en)
- Andrij Grytsiv, Darek Kaczorowski, Peter Franz Rogl, Vinh Hung Tran, Claude Godart, K Gofryk, Gerald Giester
- Abstrakt
A novel ternary structure type has been determined from single crystals of Yb2Zn3Ge3.1 grown from zinc flux solvent. Yb2Zn3Ge3.1 crystallizes in a novel monoclinic structure type (a = 1.5804(2) nm, b = 0.42970(1) nm, c = 1.1524(1) nm;ß = 126.14(1)°) with space group C2/m, Z = 4. The large ytterbium atoms are at the centres of pentagonal pyramids formed by Zn/Ge atoms. Zinc atoms are centred in distorted triangular prisms and polyhedra around germanium atoms are related to octahedra. The void at the centre of the Zn octahedra is only partially (20%) filled by Ge atoms. There are two positions for Yb atoms in the unit cell, which contain ions with valency slightly higher than 2+, as evidenced by x-ray absorption spectroscopy and bulk magnetic measurements. The compound exhibits metallic-like electrical conductivity, and its Seebeck coefficient shows a temperature variation characteristic of metals, being, however, fairly enhanced, as expected for intermediate valence systems.
- Organisation(en)
- Institut für Physikalische Chemie, Institut für Mineralogie und Kristallographie
- Externe Organisation(en)
- Polish Academy of Sciences (PAS), Université Paris XI - Paris-Sud
- Journal
- Journal of Physics: Condensed Matter
- Band
- 17
- Seiten
- 385-397
- Anzahl der Seiten
- 13
- ISSN
- 0953-8984
- DOI
- https://doi.org/10.1088/0953-8984/17/2/013
- Publikationsdatum
- 2005
- Peer-reviewed
- Ja
- ÖFOS 2012
- 105113 Kristallographie
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/b43aded1-d9a4-4e62-b2e8-6cbae8996800