A. A. Merkulov

Growth and characterization of KTi1 − xZrxAsO5 single crystals

Abstract Single crystals of KTi 1 − x Zr x AsO 5 of optical quality, isomorphous with KTP, were grown using the high-temperature self-flux technique. X-ray diffraction studies showed changes in the structure for 0 ≤ x ≤ 0.4 increase from orthorhombic ( x = 0) to a presumed rhombohedral structure R3m ( x ≥ 0.4). The structural transformations are accompanied by changes in the form of UV/IR fundamental absorption edges and light scattering. Second harmonic generation from 1.064 μm Nd:YAG laser radiation was obtained at 0 x μm .

Crystal Structure of KTP and KTA. I. Structure of the Potassium–Oxygen Nets and Differences between K+ Sites 1 and 2

The potassium–oxygen nets in the {420} planes of potassium titanyl phosphate (KTP) and its structural analogs are considered. The factors governing the stability of the structure are revealed. It is shown that the net analysis permits one to establish the fine structure of the Z-pores and the distinctions of the K(1) and K(2) structural sites. Models of domain walls in KTP and analogous crystals are suggested.

Growth and crystal structure of the BeAl6O10 single crystals

Abstract Unlike earlier published works we have established incongruent melting for the compound BeAl6O10 (BHA). The conditions of growing crystals from their own melt with a superstoichiometric excess of BeO, using the Czochralski method, have been determined. The nature of inclusions in grown BHA crystals is described. On the basis of X-ray crystal structure analysis and data of spectroscopic studies the symmetry and space group of BHA crystal structure have been refined, as well as uncertainties arising in their interpretation are discussed.