The mixed valent tellurate SrTe{sub 3}O{sub 8}: Electronic lone pair effect of Te{sup 4+}

Journal Article · Wed Nov 15 04:00:00 EST 2006 · Journal of Solid State Chemistry

DOI:https://doi.org/10.1016/j.jssc.2006.07.012· OSTI ID:20900889

Barrier, N ^[1]; Malo, S ^[1]; Hernandez, O ^[2]; Hervieu, M ^[1]; Raveau, B ^[1]

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1. Laboratoire CRISMAT, UMR 6508 CNRS Ensicaen, 6 bd Marechal Juin, 14050 Caen Cedex 4 (France)
2. UMR 6226 CNRS-Universite de Rennes 1 Sciences Chimiques de Rennes, Equipe Materiaux inorganiques: chimie douce et reactivite, Bat. 10B, campus de Beaulieu, 263, avenue du General Leclerc, F-35042 Rennes (France)

A novel mixed valent tellurium oxide, SrTe{sub 3}O{sub 8}, has been synthesized and its crystal structure was determined ab initio from powder X-ray diffraction data. This oxide, which crystallizes in a tetragonal unit-cell, P4{sub 2}/m space group, with very close a and c cell parameters (6.8257(1) and 6.7603(1) A, respectively), exhibits a very original structure built up of corner-sharing TeO{sub 6} (Te{sup 6+}) octahedra and Te{sub 2}O{sub 8} (Te{sup 4+}) twin-pyramidal units. The latter ones form [Te{sub 3}O{sub 8}]{sub {infinity}} chains running along the [001] and the [110] directions. Besides the four sided tunnels where the Sr{sup 2+} cations are located, there are very large four sided tunnels running along the c-axis which are obstructed by the electronic lone pairs of the Te{sup 4+} cations. -- Graphical abstract: Tunnel structure of the mixed valent tellurate SrTe{sub 3}O{sub 8} determined ab initio against powder X-ray diffraction; structure viewed along [001] direction with E the electronic lone pairs of the Te{sup 4+} cations.

• OSTI ID: 20900889
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 11 Vol. 179; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ELECTRON MICROSCOPY
SPACE GROUPS
STRONTIUM COMPOUNDS
STRONTIUM IONS
SYNTHESIS
TELLURIUM IONS
TELLURIUM OXIDES
TETRAGONAL LATTICES
X-RAY DIFFRACTION