The effect of oxide impurity on the physical properties of 62 ZrF4-8 LaF3-30 BaF2 (mol %) glass was studied by equimolecular substitution of BaO for BaF2. It is shown that oxide impurity decreases the infrared transparency beyond 6μm, lead to an additional absorption band at 1350 cm-1, and increases the glass transition temperature, the crystallization temperature and the viscosity of glass. The additional infrared absorption of oxide impurity in the fluorozirconate glasses result from the multiphonon process of the vibration of F—Zr—O bonds at 680 cm-1.