Redetermination of Nd(2)Ti(2)O(7): a non-centrosymmetric structure with perovskite-type slabs

Single crystals of dineodymium(III) dititanium(IV) hepta­oxide, Nd(2)Ti(2)O(7), 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...

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Detalles Bibliográficos
Autores principales: Ishizawa, Nobuo, Ninomiya, Keisuke, Sakakura, Terutoshi, Wang, Jun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Union of Crystallography 2013
Materias:
Inorganic Papers
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3629463/
https://www.ncbi.nlm.nih.gov/pubmed/23633981
http://dx.doi.org/10.1107/S1600536813005497
Descripción
Sumario:Single crystals of dineodymium(III) dititanium(IV) hepta­oxide, Nd(2)Ti(2)O(7), 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 TiO(6) octa­hedra. The Nd and Ti ions are displaced from the geometrical centres of respective coordin­ation 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].

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