High Quality Content by WIKIPEDIA articles! Niobium dioxide, is the chemical compound with the formula NbO2. It is a bluish black non-stoichiometric solid with a composition range of NbO1.94-NbO2.09. It can be prepared by reacting Nb2O5 with H2 at 800-1350 °C. An alternative method is reaction of Nb2O5 with Nb powder at 1100 °C. The room temperature form NbO2 has a tetragonal, rutile-like structure with short Nb-Nb distances indicating Nb-Nb bonding. High temp form also has a rutile-like structure with short Nb-Nb distances. Two high pressure phases have been reported one with a rutile-like structure, again with short Nb-Nb distances, and a higher pressure with baddeleyite-related structure.

Данное издание не является оригинальным. Книга печатается по технологии принт-он-деманд после получения заказа.