Shandong Univ, State Key Lab 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 RbTiOAsO4 crystal have been investigated by white-beam synchrotron radiation topography. It is found that growth sector boundaries are the primary growth defects and they show strong X-ray kinematical contrast in the topograph. All the dislocations are growth induced and appear only in the near capping region. The area away from the capping region is nearly dislocation free. Growth bands show weak contrast in the X-ray topograph. which implies that the impurity contents are relatively low in various growth sectors and each growth sector is uniform in composition. (C) 1999 Elsevier Science B.V. All rights reserved.