Etude du système SbMoO à 500°C: Mise en évidence de deux nouveaux oxydes de molybdène-antimoine

The ternary system SbMoO has been investigated by reduction using H 2 H 2 O gas mixtures and direct synthesis under vacuum. The products were studied by X-ray diffraction, electron diffraction, and high-resolution electron microscopy. Two new compounds were characterized: Sb 0.2 MoO 3.1 , which is orthorhombic, with an average oxidation state for molybdenum of 5,5; and Sb 0.4 MoO 3.1 , which is hexagonal and in which the average oxidation state of molybdenum is 5. These two phases can be considered in some ways as molybdenum bronzes, but without possessing all the related bronze characteristics.