Photorefractive cubic sillenite Bii 2 Ti0 2 o single crystals doped with P were successfully grown by using the top-seeded solution growth technique with a novel double-crucible configuration. P-doping growth with a double-crucible resulted in a distinct habit modification and striation-free crystals. P-doping increased optical rotatory power and showed a blue-shift of optical absorption edge. A phase diagram of the Bi 2 0 3 -BiP0 4 binary system was also investigated with regard to obtaining Bi 12 PO 20 crystals with a sillenite structure. 0925-3467/95/$09.50