Phase transition in sodium bismuth tungstate NaBi(WO4)2 - acoustic studies

L. Khusravbekov; E. V. Charnaya; Cheng Tien; I. K. Rakhimov; B. F. Borisov; M. I. Salakhutdinoc; M. M. Ulfatshoev

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Phase transition in sodium bismuth tungstate NaBi(WO4)2 - acoustic studies

机译：钨酸钠铋铋NaBi（WO4）2的相变-声学研究

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Acoustic studies of sodium bismuth tungstate, NaBi(WO4)2, single crystal were carried out in the temperature range from 290 K to 340 K. Strong anomalies in ultrasound velocity and attenuation were observed above room temperature for both longitudinal and transverse waves. The results obtained suggested a phase transition at 319.2 K. The order parameter responsible for the phase transition was found to be coupled linearly with strains in transverse acoustic waves and nonlinearly with those in longitudinal waves. It was suggested that the phase transition is related with substitutional ordering of the Na+ and Bi3+ ions at the cation sites.

机译：在290 K至340 K的温度范围内进行了钨酸钠铋NaBi（WO4）2单晶的声学研究。在室温下，纵波和横波均观察到超声速度和衰减的强烈异常。所获得的结果表明在319.2 K处发生了相变。发现引起相变的阶跃参数与横向声波中的应变线性耦合，而与纵向波中的非线性非线性耦合。提示相变与阳离子位点上的Na +和Bi3 +离子的取代顺序有关。

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《Physica status solidi, B. Basic research》 |2008年第8期|共3页
作者
L. Khusravbekov; E. V. Charnaya; Cheng Tien; I. K. Rakhimov; B. F. Borisov; M. I. Salakhutdinoc; M. M. Ulfatshoev;
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1. Phase transition in sodium bismuth tungstate NaBi(WO4)2 - acoustic studies [J] . L. Khusravbekov, E. V. Charnaya, Cheng Tien, Physica status solidi, B. Basic research . 2008,第8期

机译：钨酸钠铋铋NaBi（WO4）2的相变-声学研究
2. Phase equilibria diagrams, crystal growth peculiarities and Raman investigations of lead and sodium-bismuth tungstate-molybdate solid solutions [J] . Lebedev Andrei V., Avanesov Samvel A., Yunalan Tyliay M., Optical Materials . 2016,第Feba期

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3. Phase transition in a NaBi(MoO4)(2) crystal: Acoustic investigations [J] . Khusravbekov L, Charnaya EV, Vasilkov SD, Physics of the solid state . 2007,第3期

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4. Raman spectroscopic study on structure and phase transition of zirconium tungstate synthesized with a CO2 laser [C] . J P wang, Q D chen International Conference on New Material and Chemical Industry . 2018

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Phase transition in sodium bismuth tungstate NaBi(WO4)2 - acoustic studies

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