Add time:08/10/2019         Source:sciencedirect.com

The tetragonal polar barium antimony tartrate trihydrate, Ba[Sb2((+)C4H2O6)2]·3H2O, was grown to large single crystals of optical quality and several cm dimensions. A vibrational spectroscopy study, thermal expansion measurements and a determination of the pyroelectric properties were performed and possibilities for phase matching for second harmonic generation (SHG) were analysed. The crystals show a remarkable high pyroelectric coefficient, a moderate anisotropy of thermal expansion and allow for type I and type II phase matching for collinear SHG. A redetermination of the crystal structure of Ba[Sb2((+)C4H2O6)2]·3H2O at 150 K is given in addition, together with the vibrational spectra and crystal structures of two new related compounds, Ba[As2((+)C4H2O6)2]·3H2O and Ba[Sb2((+)C4H2O6)2]·4H2O, determined at the same temperature.

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