Zahn D (2013)
Publication Type: Journal article
Publication year: 2013
Book Volume: 573
Pages Range: 5-7
DOI: 10.1016/j.cplett.2013.04.058
The atomistic mechanism of the perovskite~$i̊ghtarrow$~post-perovskite transformation of MgSiO3 is explored from molecular simulation mimicking extreme pressure and temperature conditions akin to planet Earth's interior (D$''$ region). The nucleation process is highly anisotropic and initiated by column-wise rotation of SiO6 octahedra around the [0~0~1] direction. The post-perovskite transition is found to be a rare event (i.e. one requiring substantial activation energy, $∼$15~eV for the critical nucleus, but, once started, propagates very fast (103--104~m/s). The most stable phase front, the (0~1~0) interface, propagates at only 10% of the speed of the (0~0~1) phase front.
APA:
Zahn, D. (2013). Nucleation mechanism and kinetics of the perovskite to post-perovskite transition of MgSiO3 under extreme conditions. Chemical Physics Letters, 573, 5-7. https://dx.doi.org/10.1016/j.cplett.2013.04.058
MLA:
Zahn, Dirk. "Nucleation mechanism and kinetics of the perovskite to post-perovskite transition of MgSiO3 under extreme conditions." Chemical Physics Letters 573 (2013): 5-7.
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