首页|High-Pressure Behavior of Ferromagnesite(Mg0.81Fe0.19)CO3 by Synchrotron X-Ray Diffraction and Raman Spectroscopy up to 53 GPa

High-Pressure Behavior of Ferromagnesite(Mg0.81Fe0.19)CO3 by Synchrotron X-Ray Diffraction and Raman Spectroscopy up to 53 GPa

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Ferromagnesite(Mg,Fe)CO3 with 20 mol%iron is a potential host mineral for carbon transport and storage in the Earth mantle.The high-pressure behavior of synthetic ferromagnesite(Mg0.81Fe0.19)CO3 up to 53 GPa was investigated by synchrotron X-ray diffraction(XRD)and Raman spectroscopy.The iron bearing carbonate underwent spin transition at around 44-46 GPa accompa-nied by a volume collapse of 1.8%,which also demonstrated a variation in the dνi/dP slope of the Ra-man modes.The pressure-volume data was fitted by a third-order Birch-Murnaghan equation of state(BM-EoS)for the high spin phase.The best-fit K0 = 108(1)GPa and K'0 = 4.2(1).Combining the dνi/dP and the K0,the mode Grüneisen parameters of each vibrational mode(T,L,ν4 and ν1)were calculated.The effects of iron concentration on the Mg1-xFexCO3 system related to high-pressure compressibility and vibrational properties are discussed.These results expand the knowledge of the physical properties of carbonates and provide insights to the potential deep carbon host.

ferromagnesitesynchrotron XRDRaman spectroscopyhigh pressuregeochemistrymineral

Lin Liang、Guibin Zhang、Shengxuan Huang、Jingjing Niu、Dongzhou Zhang、Jingui Xu、Wen Liang、Shan Qin

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Key Laboratory of Orogenic Belts and Crustal Evolution,MOE,and School of Earth and Space Sciences,Peking University,Beijing 100871,China

CAS Center of Excellence in Tibetan Plateau Earth Sciences and Key Laboratory of Continental Collision and Plateau Uplift,Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100101,China

Hawai'i Institute of Geophysics and Planetology,School of Ocean and Earth Science and Technology,University of Hawai'i at Manoa,Hawai'i 96822,U.S.A.

Key Laboratory of High Temperature and High Pressure Study of the Earth's Interior,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China

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国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金青年基金GeoSoilEnviroCARS(the University of Chicago)Advanced Photon Source(APS)Argonne National LaboratoryNational Science Foundation-Earth SciencesDepartment of Energy-GeoSciencesCOMPRES under NSF CooperativeArgonne National Laboratory

4177203442072047NSFC-41972056NSFC-4162220241802044Sector 13EAR-1634415DE-FG02-94ER14466EAR-1661511DE-AC02-06CH11357

2024

10.1007/s12583-021-1495-y

地球科学学刊(英文版)
中国地质大学

地球科学学刊(英文版)

CSTPCD
影响因子：0.724
ISSN：1674-487X
年,卷(期)：2024.35(2)
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