Crystal structure of NaGaTe₂O₆

Autor(en)

Ronald Miletich, Franz Pertlik

Abstrakt

The crystal structure of hydrothermally synthesized NaGaTe2O6 [space group Pcab; a 7.8402(4), b 10.3265(5), c 13.3696(7) .ANG.; Z = 8] was detd. from single-crystal x-ray data and refined to R = 0.031 for 2338 reflections. The at. arrangement can formally be described as a layer structure dominated by a simple AB stacking sequence of corrugated Te(1)nTe(2)nO6n and NanGanO6n layers along the c-axis. The NanGanO6n layers are built up from GaO6 octahedra and NaO7 polyhedra which are connected to both Ga2O10 dimers and infinite [NaO5]n chains parallel to [100]. The tetravalent Te atoms exhibit typical intermediate [3+2] and [3+1] coordination for Te(1) and Te(2), resp.: the 1-sided 3-fold coordination (Te-O: 1.84 to 1.92 .ANG.) is extended by addnl. Te-O bonds (2.56 to 2.69 .ANG.). Based on simple bond-valence considerations, a relation between the variable Te4+Ox coordination, the d.p., and the influence of individual polyhedron types linked to the TexOy unit is pointed out and discussed for NaGeTe2O6.

Organisation(en)

Institut für Mineralogie und Kristallographie

Externe Organisation(en)

Universität Bayreuth

Journal

Journal of Alloys and Compounds

Band

268

Seiten

107-111

Anzahl der Seiten

5

ISSN

0925-8388

DOI

https://doi.org/10.1016/S0925-8388(97)00623-3

Publikationsdatum

1998

Peer-reviewed

Ja

ÖFOS 2012

105113 Kristallographie, 104011 Materialchemie

Schlagwörter

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/crystal-structure-of-nagate2o6(10a41bf8-7a16-49c0-9f7d-e90b7fb39480).html