The grey track effect in KTiOPO4 and KTiOAsO4 is shown to be related to the presence of Ti+3. The susceptibility to grey track formation was maximum in crystals grown from tungsten-based solvents. The data shows that no clear correlations exist between grey track susceptibility and either ionic conductivity or crystal-growth temperature. The similarity of grey tracks with photorefractive damage in LiNbO3 suggests the effect can be eliminated by stabilization of Ti+3 using charge compensation.

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If you are interested in eventual retirement, this article discusses some issues that you may wish to consider. For example, a variety of ethical, legal, professional, business, clinical, and personal considerations are critical when a psychologist decides to retire and close a practice. When these diverse considerations are approached sensitively and are well resolved, the best interests of clients are emphasized, and optimally, they will cope more adequately with their psychologist's retirement. Managing these considerations effectively will also enhance the psychologist's move into retirement.

Crystals of KTiOAsO4 were grown by the high temperature solution method and their optical and ionic conductivity properties evaluated. The band edge and IR cutoff were 370 and 4850 nm, respectively. A domain structure prevented efficient frequency conversion in as-grown crystals. The ionic conductivity at 22 °C and 120 kHz was 1.5×10−8, 7.3×10−9, and 1.7×10−6 S/cm for the [100], [010], and [001], respectively. The alleged ferroelectric Curie temperature was 852 ±2 °C.

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