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Auxiliary material for this article contains a text file describing sample characterization; determination of the spin crossover from experimental data and derivation of the thermal EoS parameters; and pressure and temperature dependence of the LS fraction, thermal expansion coefficient, isothermal bulk modulus, and bulk sound velocity along a lower-mantle geotherm, as well as three figures showing the representative X-ray diffraction patterns of ferropericlase in a laser-heated DAC at high pressures and temperatures, the fraction of the LS state in ferropericlase along a mantle geotherm, and the thermal elastic parameters of ferropericlase at constant temperatures derived from our experimental results and a table containing the experimental obtained unit cell volume of ferropericlase at a given temperature.

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Additional file information is provided in the readme.txt.

FilenameFormatSizeDescription
grl28755-sup-0001-readme.txtplain text document3Kreadme.txt
grl28755-sup-0002-txts01.docWord document55KText S1. Addition details on sample characterization; determination of the spin crossover from experimental data and deriving the thermal EoS; pressure and temperature dependence of the LS fraction; and thermal expansion coefficient, isothermal bulk modulus, and bulk sound velocity along a mantle geotherm.
grl28755-sup-0003-fs01.epsPS document106KFigure S1. Representative X-ray diffraction patterns of ferropericlase [(Mg0.75Fe0.25)O] in a laser-heated DAC at high pressures and temperatures.
grl28755-sup-0004-fs02.epsPS document55KFigure S2. Fraction of the LS state in ferropericlase along a mantle geotherm.
grl28755-sup-0005-fs03.epsPS document325KFigure S3. Thermal elastic parameters of ferropericlase [(Mg0.75Fe0.25)O] at constant temperatures derived from our experimental results.
grl28755-sup-0006-ts01.txtplain text document4KTable S1. Pressure-volume data of fp25.

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