Hydrothermal Synthesis and Crystal Growth of Potassium Titanyl Arsenate, KTiOAsO

HYDROTHERMAL SYNTHESIS AND CRYSTAL GROWTH OF POTASSIUM TITANYL ARSENATE, KTiOAsO  

Submitted by MARK L. F. PHILLIPS and GALEN D. STUCKYJ Checked by JOHN B. INGSf 

The Au tube used in this procedure (4 in. long x -in.-o.d. x 0.010-in. wall, Engelhard) is prepared by annealing both ends at a dull red heat using a 

Powder X-ray diffractometry shows that the lattice is orthorhombic, space group Pnali, with a = 13.146(5) k,b 6.584(2) A, c = 10.771(6) A. Typical width of single-crystal X-ray omega (cu) scan peaks is 0.15°, suggesting the absence of domain walls. The techniques available for visualizing ferro-electronic domains in KTP - (pyroelectric, piezoelectric, and electrooptic) should be applicable to KTA as well. 

Submitted by THEODORE D. BRENNAN and JAMES A. IBERSf Checked by L. F. SCHNEEMEYER  

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