Growth and properties of a new birefringent α-BaB2O2 crystal

A novel birefringent (alpha) -BaB2O4 crystal with 40 mm in diameter, 35 mm in height has been grown successfully in our laboratory by Czochralski method. The proportion of B2O3 and BaO of starting materials, crystal cracking and the transmission spectrum of (alpha) -BaB2O4 crystal have been briefly analyzed.