Investigations Concerning the Quasi‐binary System V₂O₅ – Nb₂O₅

Abstract

Abstract In examining the pseudobinary system V 2 O 5 – Nb 2 O 5 it was possible to isolate, by systematic transport reactions, just one stable compound of the mean composition V 1.057 Nb 8.943 O 25 in addition to the boundary phases, which is in contrast to the data given in the literature. The phase width of this compound is very small and within the confidence limits of the analytical method of determination of 0.2 p.c. A maximum of 50 ppm Nb 2 O 5 only dissolve in V 2 O 5 . Determining the solubility of V 2 O 5 in Nb 2 O 5 failed, because the two‐phase products resulting during the chemical transport of the respective samples could not be separated exactly.