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Published April 13, 2018 | metadata_only
Book Section - Chapter

Melts Under Extreme Conditions From Shock Experiments


Shock compression methods form an important complement to static compression and computational approaches for probing the equation of state and thermodynamic properties of melts. This chapter summarizes shock compression, the theory by which laboratory shocks constrain liquid properties, and the standard experimental methods. It discusses the equations of state of several silicate liquid compositions and implications for microscopic structural mechanisms of liquid compression. From the available data, it examines the range of applicability and limitations of the linear mixing model for multicomponent liquid volumes and applies it to evaluate the relative buoyancy of melts and solids during lower-mantle magma ocean crystallization. Finally, the thermodynamic Grüneisen parameter is defined, its importance in shock wave research and in convecting systems explained, and its behavior according to shock experiments and molecular dynamics simulations discussed. Shock wave data on silicate liquids from several papers and recommended equation of state parameters for those liquids are compiled for convenient reference.

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© 2018 Elsevier Inc. Available online 13 April 2018.

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August 22, 2023
August 22, 2023