High-pressure ferroelastic phase transition in aluminosilicate hollandite

Tiziana Boffa Ballaran; Jun Liu; Leonid S. Dubrovinsky; Razvan Caracas; Wilson Crichton

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High-pressure ferroelastic phase transition in aluminosilicate hollandite

机译：硅铝酸铝锰矿中的高压铁弹性相变

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We used x-ray synchrotron powder diffraction, Raman spectroscopy, and first-principles calculations to characterize the high-pressure ferroelastic I4/m to I2/m transition of K_(0.8)Na_(0.2)AlSi_3O_8 hollandite, a structural prototype of materials used in various applications ranging from immobilization of radioactive wastes to ionic conductors. The transition is second-order in character with an equilibrium transition pressure renormalized by coupling of the soft mode with the spontaneous strain. The variations in the lattice strains and of the frequency of the soft optic mode with pressure have been used to develop a Landau free-energy expansion to describe the elastic constant variations in K_(0.8)Na_(0.2)AlSi_3O_8 across the transition.

机译：我们使用X射线同步加速器粉末衍射，拉曼光谱和第一性原理计算来表征K_（0.8）Na_（0.2）AlSi_3O_8沸石的高压铁弹性I4 / m至I2 / m跃迁，该结构是所用材料的结构原型从固定放射性废物到离子导体，应有尽有。该过渡是二阶的，其平衡过渡压力通过软模式与自发应变的耦合而重新归一化。晶格应变和软光学模式的频率随压力的变化已用于开发Landau自由能展开，以描述跃迁中K_（0.8）Na_（0.2）AlSi_3O_8的弹性常数变化。

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来源
《Physical review》 |2009年第21期|214104.1-214104.7|共7页
作者
Tiziana Boffa Ballaran; Jun Liu; Leonid S. Dubrovinsky; Razvan Caracas; Wilson Crichton;
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作者单位

Bayerisches Geoinstitut, Universitaet Bayreuth, D-95440 Bayreuth, Germany;

Bayerisches Geoinstitut, Universitaet Bayreuth, D-95440 Bayreuth, Germany;

Bayerisches Geoinstitut, Universitaet Bayreuth, D-95440 Bayreuth, Germany;

Centre National de la Recherche Scientifique, Laboratoire de Sciences de la Terre, UMR 5570,Ecole Normale Superieure de Lyon, 46 allee d'Italie, 69364 Lyon, France;

European Synchrotron Radiation Facility, Boite Postale 220, 38043 Grenoble Cedex 9, France;

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正文语种 eng
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crystallographic aspects of phase transformations pressure effects; high-pressure behavior;

机译：相变压力效应的晶体学方面;高压行为;

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1. Crystal chemistry of lead aluminosilicate hollandite: A new high-pressure synthetic phase with octahedral Si [J] . ROBERT T. DOWNS, ROBERT M. HAZEN, LARRY W. FINGER The American mineralogist . 1995,第9a10期

机译：铝硅酸铅锰锌矿的晶体化学：八面体硅的新型高压合成相
2. First-principles study on the high-pressure phase transition and elasticity of KAlSi_3O_8 hollandite [J] . Kawai K., Tsuchiya T. The American mineralogist . 2013,第1期

机译：KAlSi_3O_8辉石的高压相变和弹性的第一性原理研究
3. A high-pressure neutron diffraction study of the ferroelastic phase transition in RbCaF_3 [J] . Kevin S. Knight, William G. Marshall, Philip M. Hawkins Physics and chemistry of minerals . 2014,第6期

机译：RbCaF_3中铁弹性相变的高压中子衍射研究
4. Slowness surfaces study of the ferroelastic phase transition of LiCsSO4 crystal [C] . Zhou Guo-xiang, Guo Mei-ling, Bai Xue, Symposium on Piezoelectricity, Acoustic Waves and Device Applications . 2015

机译：LiCsSO4晶体铁弹性相变的慢度表面研究
5. High-pressure Raman scattering studies of magnon-phonon interactions and ferroelastic phase transitions. [D] . Rosenblum, Steven S. 1997

机译：磁振子-声子相互作用和铁弹性相变的高压拉曼散射研究。
6. High-Pressure Phase Transition of Micro- and NanoscaleHoVO4 and High-Pressure Phase Diagram of REVO4 with RE Ionic Radius [O] . Junbo Gong, *, Xiaodong Fan, 2018

机译：微米级和纳米级的高压相变稀土离子半径的REVO4的HoVO4和高压相图
7. (Na,K) Aluminosilicate Hollandites: Structures, Crystal Chemistry, and High-pressure Behaviour [O] . Liu Jun 2007

机译：（Na，K）铝硅酸盐荷兰岩：结构，晶体化学和高压行为
8. Uniaxial Stress Studies of Ferroelectric and Ferroelastic Phase Transitions [R] . Billesbach, D. P., Ullman, F. G. 1992

机译：铁电和铁弹相变的单轴应力研究

High-pressure ferroelastic phase transition in aluminosilicate hollandite

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