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Journal Article

Crystalline structure of the strontium niobates Sr4Nb2O9 and Sr5Nb4O15

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Citation

Weiden, M., Grauel, A., Norwig, J., Horn, S., & Steglich, F. (1995). Crystalline structure of the strontium niobates Sr4Nb2O9 and Sr5Nb4O15. Journal of Alloys and Compounds, 218(1), 13-16. doi:10.1016/0925-8388(94)01461-2.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0019-E56A-3
Abstract
The 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 Sr4Nb4O15 and Sr5Nb4O15 were obtained by Rietveld analysis, indicating triclinic and monoclinic unit cell parameters, respectively. Both structures reveal a layering of Sr-O planes. The Nb ions are located in octahedral holes between the Sr-O layers.