The glass transition temperature, thermal expansion coefficient and electrical conductivity have been measured for oxybromide tellurite glasses in the system LiBrLi 2OTeO 2. Results are discussed in relation to the glass structure together with the previous results reported of the LiClLi 2OTeO 2 system. The glass transition temperature is higher and the thermal expansion coefficient is lower in the LiBr-containing glasses than in corresponding LiCl glasses. The electrical conductivity is lower in the LiBr-containing glasses especially in glasses with low TeO 2 content. These phenomena are explained by considering the strength of the TeO ax bond, where ax denotes an axial position, and the amount of TeO 3 2−; the degree of weakening of the TeO ax bond, which brings about the formation of TeO 3 2−, is smaller in LiBr glasses than in the LiCl glasses. In glasses with high TeO 2 content, increase of the LiBr/(LiBr+Li 2O) ratio increases the glass transition temperature and decreases the thermal expansion coefficient. This is explained in terms of the variation of strength of the TeO ax bond.