Crystalline structure of the strontium niobates Sr<sub>4</sub>Nb<sub>2</sub>O<sub>9</sub> and Sr<sub>5</sub>Nb<sub>4</sub>O<sub>15</sub>
- Weiden, M.
- Grauel, A.
- Norwig, J.
- Horn, S.
- Steglich, F.
DOIAbstract
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
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