ISSN:
0044-2313
Keywords:
Chemistry
;
Inorganic Chemistry
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Description / Table of Contents:
Synthesis and Investigation of NiNb2O6 Single Crystals of Columbite and Rutil TypeC-NiNb2O6 (columbite type) and R-NiNb2O6 (rutil type) single crystals were prepared by solid state reactions. C-NiNb2O6 a = 14.032; b = 5.687; c = 5.033 Å, space group D2h14 - Pbcn. R-NiNb2O6 a = 4.710; c = 3.038 Å, space group D4h14 - P42/mnm. The metal positions of the rutil structure are statisticaly occupied by Ni2+ and Nb5+ ions. R-NiNb2O6 is in respect to lower temperatures a metastable compound.
Notes:
Mit Festkörperreaktionen wurden Einkristalle von NiNb2O6 präpariert und röntgenographisch untersucht. C-NiNb2O6 (Columbitstruktur) a = 14,032; b = 5,687; c = 5,033 Å, Raumgruppe D2h14 - Pben; R-NiNb2O6 (Rutilstruktur) a = 4,710; c = 3,038 Å, Raumgruppe D4h14 - P42/mnm. Ni2+ und Nb5+ besetzen im Rutilgitter die Metallpositionen statistisch, gegenüber C-NiNb2O6 ist R-NiNb2O6 bei tiefen Temperaturen metastabil.
Additional Material:
3 Tab.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/zaac.19835030810
