Physical properties and phase transitions of bis (guanidinium) zirconium bis (nitrilotriacetate) hydrate, [C(NH₂)₃]₂ Zr [N(CH₂COO)₃]₂•H₂O

Author(s)

Eiken Haussühl, Ekkehart Tillmanns

Abstract

Large single crystals of optical quality of bis(guanidinium)zirconium bis(nitrilotriacetate)hydrate have been grown from aqueous solutions. Complete elastic, thermoelastic and piezoelastic tensors have been determined by ultrasonic methods. In addition, the tensor of thermal expansion, refractive indices, dielectric and piezoelectric constants have been studied in the range between 210 K and 330 K. Most physical properties investigated show a strong anisotropy. The piezoelectric constant d123 exceeds d111 of α-quartz by a factor of 25. Two higher-order phase transitions appear at about 287 K and 290 K. The intermediate phase exhibits strong anomalies of the temperature and pressure dependence of the propagation velocities of quasi-longitudinal elastic waves having a large component of the displacement vector parallel to [010].

Organisation(s)

Department of Mineralogy and Crystallography

Journal

Zeitschrift für Kristallographie : international journal for structural, physical, and chemical aspects of crystalline materials

Pages

826-831

No. of pages

6

ISSN

0044-2968

Publication date

1997

Peer reviewed

Yes

Austrian Fields of Science 2012

103009 Solid state physics, 105113 Crystallography

Portal url

https://ucrisportal.univie.ac.at/en/publications/c93a3d72-e46b-4300-8fba-b0328a88abfe