“…In order to control the crystal growth easily and avoid the phase transformation, many solvents have been used to grow BBO crystals, such as B (Levin & Mcmurdie, 1949;Huang & Liang, 1981;Wang & Huang, 1985;Jiang et al, 1986;Cheng et al, 1988;Feigelson et al, 1989;Gualtieri et al, 1989;Huang & Liang, 1989;Bordui et al, 1993;Oseledchik et al, 1993;Cheng et al, 1997;Kim et al, 1998;Chen et al, 2003;Bekker et al, 2009;Fedorov et al, 2002). Recently, Bekker et al (2012) reported the results of their investigation of the ternary reciprocal system Na, Ba// BO 2 , F, and grew large BBO crystals from the BaB 2 O 4 ÀBa 2 Na 3 [B 3 O 6 ] 2 F system.…”