Elastic and Thermoelastic Properties of the Twinned Perovskite LaGaO 3  and the Cubic Untwinned Perovskite La 0.294 Sr 0.706 Al 0.647 Ta 0.353 O 3 | Zendy

Haussühl S. | Zendy; Mateika D. | Zendy

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Elastic and Thermoelastic Properties of the Twinned Perovskite LaGaO 3 and the Cubic Untwinned Perovskite La 0.294 Sr 0.706 Al 0.647 Ta 0.353 O 3

Author(s) -

Haussühl S.,

Mateika D.

Publication year - 1991

Publication title -

crystal research and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.377

H-Index - 64

eISSN - 1521-4079

pISSN - 0232-1300

DOI - 10.1002/crat.2170260420

Subject(s) - thermoelastic damping , perovskite (structure) , materials science , ionic bonding , condensed matter physics , mineralogy , crystallography , thermodynamics , chemistry , ion , physics , thermal , organic chemistry

The elastic and thermoelastic constants of twinned crystals of LaGaO 3 and untwinned crystals of La 0.294 Sr 0.706 Al 0.647 Ta 0.353 O 3 have been measured by ultrasonic resonance methods. Both materials exhibit a quite similar elastic behaviour characteristic, as for perovskites. Employing a simple formula for ionic crystals, the elastic constants of both oxygen perovskites reveal a depression of about one third in comparison to the fluor perovskite LiBaF 3 .

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