Crystalline structure of the strontium niobates Sr4Nb2O9 and Sr5Nb4O15
1995; Elsevier BV; Volume: 218; Issue: 1 Linguagem: Inglês
10.1016/0925-8388(94)01461-2
ISSN1873-4669
AutoresM. Weiden, A. Grauel, Jochen Norwig, S. Horn, F. Steglich,
Tópico(s)Electronic and Structural Properties of Oxides
ResumoThe strontium niobate compounds Sr4Nb2O9 and Sr5Nb4O15 were prepared by solid state reactions and studied by high-resolution X-ray powder diffraction measurements. The structures of the two systems Sr4Nb2O9 and Sr5Nb4O15 were obtained by Rietveld analysis, indicating triclinic and monoclinic unit cell parameters, respectively. Both structures reveal a layering of SrO planes. The Nb ions are located in octahedral holes between the SrO layers.
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