Abstract
The phase equilibria in the Cr 2V 4O 13-CrVMoO 7 system at temperatures up to 1000 °C over the entire component concentration range have been studied by DTA and X-ray powder diffraction. It has been found that there is a solid solution of MoO 3 in Cr 2V 4O 13 in this system. The Mo 6+ ions are incorporated in the Cr 2V 4O 13 lattice, replacing V 5+ ions, and this substitution gives rise to excessive positive charges the compensation of which leads to the reduction of Cr 3+ to Cr 2+. All the results are shown in the form of a phase diagram.
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