High temperature/high pressure synthesis and crystal structure of the new corundum related compound Zn 4Nb 2O 9

A new high-pressure, high-temperature phase, Zn 4Nb 2O 9, has been prepared at T=1700 °C, using a pressure of P=9 GPa. An XRD study based on the Rietveld technique showed the structure to be corundum related ( P 3 ̄ c1 , Z=2) with the unit-cell parameters a=5.1864(1) Å, c=14.1445(2) Å. The structure...

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Bibliographic Details
Published inSolid state sciences Vol. 5; no. 3; pp. 459 - 463
Main Authors Tarakina, Nadezhda V., Tyutyunnik, Alexander P., Zubkov, Vladimir G., D'yachkova, Tatjana V., Zainulin, Yury G., Hannerz, Hillevi, Svensson, Gunnar
Format Journal Article
LanguageEnglish
Published Elsevier Masson SAS 2003
Subjects
Crystal structure
Electron diffraction
Electron microscopy
High pressure
Oxoniobate
Rietveld refinement
X-ray powder diffraction
Zinc niobium oxide
Zinc niobium oxide
Rietveld refinement
Electron diffraction
X-ray powder diffraction
Oxoniobate
Electron microscopy
Crystal structure
High pressure
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Summary:A new high-pressure, high-temperature phase, Zn 4Nb 2O 9, has been prepared at T=1700 °C, using a pressure of P=9 GPa. An XRD study based on the Rietveld technique showed the structure to be corundum related ( P 3 ̄ c1 , Z=2) with the unit-cell parameters a=5.1864(1) Å, c=14.1445(2) Å. The structure consists of close-packed oxygen atoms, with 2/3 of the octahedral interstices occupied by zinc and niobium atoms. The space group was confirmed by micro diffraction and selected-area electron diffraction studies. Graphic
ISSN:1293-2558
1873-3085
DOI:10.1016/S1293-2558(03)00024-4