Auxiliary material for this article contains synthesis and experimental details, three figures, and a table.

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grl25863-sup-0001-readme.txtplain text document3KReadme.txt
grl25863-sup-0002-txts01.txtplain text document6KText S1. Descriptions of the sample characterization, synthesis, and pressure determination from measured lattice parameters of gold and NaCl.
grl25863-sup-0003-fs01.jpgimage/pjpeg1393KFigure S1. Raw X-ray diffraction image of PPv at P = 1.19 Mbar.
grl25863-sup-0004-fs02.epsPS document347KFigure S2. Conventional Mössbauer spectra for the sample assemblage at P = 1.19 Mbar, as calculated from CONUSS using the best-fit parameters in Table 1, with and without stainless steel.
grl25863-sup-0005-fs03.epsPS document551KFigure S3. Synchrotron Mössbauer spectrum of PPv at P = 1.19 Mbar with calculated fits including increasing amounts of a high quadrupole splitting site distinctive of perovskite.
grl25863-sup-0006-ts01.txtplain text document1KTable S1. Hyperfine parameters of iron obtained with associated valence and spin states from selected high-pressure measurements on crystalline materials at room-temperature.
grl25863-sup-0007-t01.txtplain text document1KTab-delimited Table 1.

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