New High‐Pressure Phase of CaCO3 at the Topmost Lower Mantle: Implication for the Deep‐Mantle Carbon Transportation

New High‐Pressure Phase of CaCO3 at the Topmost Lower Mantle: Implication for the Deep‐Mantle Carbon Transportation

Abstract In this study, we have investigated the stability of CaCO3 at high pressures and temperatures using synchrotron X‐ray diffraction in laser‐heated diamond anvil cells. Our experimental results have shown that CaCO3 in the aragonite structure transforms into CaCO3‐VII (P21/c) at 27 GPa and 1,...

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Bibliographic Details
Main Authors: Xinyang Li, Zhigang Zhang, Jung‐Fu Lin, Huaiwei Ni, Vitali B. Prakapenka, Zhu Mao
Format: Article
Language:English
Published: Wiley 2018-02-01
Series:Geophysical Research Letters
Subjects:
CaCO3‐VII
CaCO3‐SiO2 reaction
topmost lower mantle
high pressure‐temperature
carbon transportation
Online Access:https://doi.org/10.1002/2017GL076536
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https://doi.org/10.1002/2017GL076536

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