Thermal Equation of State of Natural F-Rich Topaz up to 29 GPa and 750 K

作     者：Yungui Liu Xiang Li Haipeng Song Jingui Xu Dongzhou Zhang Junfeng Zhang Xiang Wu Yungui Liu;Xiang Li;Haipeng Song;Jingui Xu;Dongzhou Zhang;Junfeng Zhang;Xiang Wu

作者机构：State Key Laboratory of Geological Processes and Mineral ResourcesChina University of GeosciencesWuhan 430074China College of Gems and MaterialsHebei GEO UniversityShijiazhuang 050031China Hawai'i Institute of Geophysics and PlanetologySchool of Ocean and Earth Science and TechnologyUniversity of Hawaii at ManoaHonolulu HI 96822USA 

出 版 物：《Journal of Earth Science》 (地球科学学刊（英文版）)

年 卷 期：2023年第34卷第3期

页      面：758-766页

核心收录：

学科分类：0709[理学-地质学] 070901[理学-矿物学、岩石学、矿床学] 07[理学] 0708[理学-地球物理学] 0704[理学-天文学] 

基　　金：financial support from the National Science Foundation of China(No.41827802) supported by the National Science Foundation-Earth Sciences(No.EAR-1634415) the Department of Energy,Geosciences(No.DE-FG0294ER14466) supported by DOE-BES(No.DE-AC0206CH11357) supported in part by COMPRES under NSF Cooperative Agreement EAR-1661511 

主　　题：topaz hydrous mineral water fluorine subduction zones 

摘      要：Subducting oceanic sediments and crusts,originating from the Earth s surface and descending into its deep interior,are important carriers of *** volatiles have significant effects on materials cycling and the dynamic evolution of the subduction zones.A simplified Al_(2)O_(3)-SiO_(2)-H_(2)O(ASH)ternary system models the relationship of minerals in the hydrated and alumina-silica rich sedimentary *** Al_(2)SiO_(4)(F,OH)_(2)is an important mineral in the ASH system and comprises two volatiles:H_(2)O and fluorine(F).In this study,the thermoelasticity of a natural F-rich topaz was investigated using synchrotron-based single-crystal X-ray diffraction combined with diamond anvil cells up to 29.1 GPa and 750 *** pressure-volume-temperature data were fitted to a third-order Birch-Murnaghan Equation of state with V_(0)=343.15(7)Å3,K_(0)=166(1)GPa,K_(0) =3.0(1),(∂K_(0)/∂T)P=-0.015(9)GPa/K andα_(0)=3.9(5)×10^(-5)K^(-1).The isothermal bulk modulus increases with the F content in topaz,and the various F contents present significant effects on its anisotropic *** results further reveal that the isothermal bulk modulus K_(0)of the minerals in ASH system increases with density.F and H contents in hydrous minerals might greatly affect their properties(e.g.,compressibility and stability),providing more comprehensive constraints on the subduction zones.