“…7). Considering that fresnoite is a potential NLO structure (18,19), we believed that it is important to establish the role of square-pyramidal TiO toward SHG properties. In view of the foregoing, we prepared and examined several members of borates, silicates, and phosphates of the above-mentioned structure types containing NbO /TiO octahedral chains as well as isolated TiO square pyramids and examined their SHG response toward 1064-nm laser radiation.…”