alpha-lead tellurite from single-crystal data
2008 (English)In: Acta Crystallographica Section E: Structure Reports Online, ISSN 1600-5368, E-ISSN 1600-5368, Vol. 64, I16-U10 p.Article in journal (Refereed) Published
The crystal structure of the title compound, alpha-PbTeO3 ( PTO), has been reported previously by Mariolacos [ Anz. Oesterr. Akad. Wiss. Math. Naturwiss. Kl. ( 1969), 106, 128-130], refined on powder data. The current determination at room temperature from data obtained from single crystals grown by the Czochralski method shows a significant improvement in the precision of the geometric parameters when all atoms have been refined anisotropically. The selection of a centrosymmetric (C2/c) structure model was confirmed by the second harmonic generation test. The asymmetric unit contains three formula units. The structure of PTO is built up of three types of distorted [PbOx] polyhedra (x=7 and 9) which share their O atoms with TeO3 pyramidal units. These main anionic polyhedra are responsible for establishing the two types of tunnel required for the stereochemical activity of the lone pairs of the Pb2+ and Te4+ cations.
Place, publisher, year, edition, pages
2008. Vol. 64, I16-U10 p.
IdentifiersURN: urn:nbn:se:uu:diva-260238DOI: 10.1107/S1600536808003267ISI: 000253792100002PubMedID: 21201834OAI: oai:DiVA.org:uu-260238DiVA: diva2:846752