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- W2252074852 abstract "Elastic properties of leucite have been investigated using resonant ultrasound spectroscopy over a temperature range from 300 to 1400 K. According to these measurements, elastic moduli soften by ~50% at the Ia3d-I41/acd ferroelastic transition temperature Tc1 = 940 K relative to the value at 1400 K. A second softening is observed at Tc2 = 920 K, corresponding to the structural change from the space group I41/acd to I41/a. These elastic anomalies are analyzed in a simple model under the assumption that the transitions observed at Tc1 and Tc2 can be approximated by a single pseudoproper ferroelastic transition. The two phase transitions are accompanied by a single peak in mechanical damping attributed to the high mobility of twin walls in the intermediate phase followed by pinning in the low-temperature phase. To determine whether twin walls in tetragonal leucite are polar, resonant piezoelectric spectroscopy and second harmonic generation measurements were performed, but no evidence of polarity was found." @default.
- W2252074852 created "2016-06-24" @default.
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- W2252074852 date "2015-10-01" @default.
- W2252074852 modified "2023-09-27" @default.
- W2252074852 title "Elastic softening of leucite and the lack of polar domain boundaries" @default.
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- W2252074852 doi "https://doi.org/10.2138/am-2015-5313ccby" @default.
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