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Phase relations in the system V/Nb/O. V. Investigation of mixed crystals V1-xNbxO2 |
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| Authors: | H Oppermann F von Woedtke T Reich M A Denecke H Nitsche and M Doerr |
| Institution: | (1) Institut für Anorganische Chemie der TU Dresden, Mommsenstrasse 13, D-01069 Dresden, Germany, DE;(2) Institut für Radiochemie, Forschungszentrum Rossendorf e. V., PF 510 119, D-01314 Dresden, Germany, DE;(3) Institut für Angewandte Physik und Didaktik der Physik, Mommsenstrasse 13, D-01069 Dresden, Germany, DE |
| Abstract: | Mixed crystals V1-xNbxO2 exist over the whole area of the quasibinary line VO2-NbO2. The existence of Nb5+ beside V3+ and V4+ on the V-rich side and V3+ beside Nb5+ and Nb4+ on the Nb-rich side of the mixed crystals is demonstrated by XANES-measurements. The compound VNbO4(V0.5Nb0.5O2) is described as a double oxide with vanadium only as V3+ and niobium only as Nb5+. At this point the electric resistivity of the solid solution shows a maximum. Received: 11 May 1998 / Revised: 4 August 1998 / Accepted: 10 August 1998 |
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