Crystal growth, crystal structure and physical properties of polar orthorhombic tris(glycine) zinc chloride by M. Fleck, P. Becker, L. Bayarjargal, R. Ochrombel, and L. Bohatý

Crystal Research and Technology

Cryst. Res. Technol. 43, 127 (2008) - Abstract -

Crystal growth, crystal structure and physical properties of polar orthorhombic tris(glycine) zinc chloride

M. Fleck, P. Becker*, L. Bayarjargal*, R. Ochrombel*, and L. Bohatý*

Institut für Mineralogie und Kristallographie, Universität Wien, Althanstr. 14, 1090 Wien
*Institut für Kristallographie, Universität zu Köln, Zülpicher Str. 49 b, 50674 Köln

Keywords	glycine zinc chloride, crystal growth, linear optical properties, SHG phase matching conditions, piezoelectric properties
PACS	61.66.Fn, 77.65.Bn, 77.84.Bw, 78.20.Ci, 81.10.Dn
DOI	10.1002/crat.200711070

Large single crystals of the polar (point group mm2) compound tris(glycine) zinc chloride, (NH₃CH₂COO)₃.ZnCl₂, were grown from aqueous solutions. The refractive indices were measured in the wavelength region from 365 nm to 1083 nm and an unpolarised absorption spectrum was recorded (transparency range from 260 to 1550nm). The phase matching conditions for second harmonic generation were analysed: both, type I (ss-f) and type II (sf-f) are possible in the red and near IR region. All five components of the piezoelectric tensor were determined; the maximum values of longitudinal and transverse piezoelectric effects are less than one half of α-quartz. In addition, a redetermination of the crystal structure (including location of H atoms) is presented.

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