Fig. 8
From: Effect of grain size on amorphization mechanism and kinetics of bridgmanite in shocked meteorites
Survived bridgmanite fraction after amorphization as a function of temperature. The solid curve shows the variation between the bridgmanite and amorphous fractions with different timescales of 10–2–104 s based on the Avrami component n of 0.05. The fraction change of coarse grains (Nishi et al. 2022) is also shown for comparison (dashed curve). Assuming the fine-grained polycrystalline bridgmanite, the residual post-shock temperature was estimated to be ~ 700 K when 10 mol% of bridgmanite was preserved in the shocked meteorite at a timescale of 102 s. This temperature was 100 K higher than the previously estimated value assuming coarse grains