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Redetermination of Nd2Ti2O7: a non-centrosymmetric structure with perovskite-type slabs.

Authors :
Ishizawa N
Ninomiya K
Sakakura T
Wang J
Source :
Acta crystallographica. Section E, Structure reports online [Acta Crystallogr Sect E Struct Rep Online] 2013 Mar 06; Vol. 69 (Pt 4), pp. i19. Date of Electronic Publication: 2013 Mar 06 (Print Publication: 2013).
Publication Year :
2013

Abstract

Single crystals of dineodymium(III) dititanium(IV) hepta-oxide, Nd2Ti2O7, were synthesized by the flux method and found to belong to the family of compounds with perovskite-type structural motifs. The asymmetric unit contains four Nd, four Ti and 14 O-atom sites. The perovskite-type slabs are stacked parallel to (010) with a thickness corresponding to four corner-sharing TiO6 octa-hedra. The Nd and Ti ions are displaced from the geometrical centres of respective coordin-ation polyhedra so that the net polarization occurs along the c axis. The investigated crystals were all twinned and have a halved monoclinic unit cell in comparison with the first structure determination of this compound [Scheunemann & Müller-Buschbaum (1975 ▶). J. Inorg. Nucl. Chem. 37, 2261-2263].

Details

Language :
English
ISSN :
1600-5368
Volume :
69
Issue :
Pt 4
Database :
MEDLINE
Journal :
Acta crystallographica. Section E, Structure reports online
Publication Type :
Academic Journal
Accession number :
23633981
Full Text :
https://doi.org/10.1107/S1600536813005497