A one-dimensional cuprate closely related to the 0212'-structure: Nd[sub 2]Ba[sub 4]Cu[sub 2]O[sub 9]

Journal Article · Fri Oct 01 04:00:00 EDT 1993 · Journal of Solid State Chemistry; (United States)

DOI:https://doi.org/10.1006/jssc.1993.1286· OSTI ID:5122872

Domenges, B; Michel, C; Barbey, L; Nguyen, N; Raveau, B ^[1]; Abbattista, F; Vallino, M ^[2]

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1. Laboratoire CRISMAT, Caen (France)
2. Dipartimento di Scienza dei Materiali e Ingegneria Chimica, Turin (Italy)

The structure of the cuprate Nd[sub 2]Ba[sub 4]Cu[sub 2]O[sub 9] has been determined using both X-ray powder diffraction and high resolution electron microscopy. The compound crystallizes in the space group P4n2 with a = 12.072, c =3.874 [angstrom]. The structure consists of isolated chains of corner-sharing CuO[sub 5] pyramids whose cohesion is ensured by the presence of Nd[sup 3+] and Ba[sup 2+] cations, the coordination of which can be described as distorted monocapped trigonal prisms BaO[sub 7] and NdO[sub 7]. A description of the structure in terms of pyramidal copper chains sharing their corners with NdO[sub 5] tetragonal pyramids is also given. The resulting three-dimensional framework [Nd[sub 2]Cu[sub 2]O[sub 8]][sub x] forms octogonal tunnels where the barium cations and the additional oxygen are located. The close relationships between this one-dimensional cuprate and the layered cuprates are discussed.

• OSTI ID: 5122872
• Journal Information: Journal of Solid State Chemistry; (United States), Journal Name: Journal of Solid State Chemistry; (United States) Vol. 106:2; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
COHERENT SCATTERING
COPPER COMPOUNDS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CUPRATES
DIFFRACTION
LATTICE PARAMETERS
NEODYMIUM COMPOUNDS
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SCATTERING
TETRAGONAL LATTICES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION