SHANDONG UNIV,INST CRYSTAL MAT,JINAN 250100,PEOPLES R CHINA
; INST HIGH ENERGY PHYS,BEIJING SYNCHROTRON RADIAT LAB,BEIJING 100039,PEOPLES R CHINA
The growth defects in flux-grown NdxY1-xAl3(BO3)(4) (NYAB) single crystals have been investigated by means of chemical etching and synchrotron radiation techniques. The band-shaped and polysynthetic twins were detected by optical microscopy due to the difference in etching rates between the host crystal and the twin. In the meantime, the orientation and symmetry of the twins were analyzed from their etching patterns. A large number of etch pits with regular shapes were also found on the surface, and these etch pits correspond to outcrops of the dislocations originating from the seed crystal or inclusions.