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High-pressure melting of MgSiO3

Belonoshko, Anatoly B. (author)
KTH,Kondenserade materiens teori
Skorodumova, N. V. (author)
Rosengren, Anders (author)
KTH,Kondenserade materiens teori
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Ahuja, Rajeev (author)
KTH,Materialvetenskap
Johansson, Börje (author)
KTH,Tillämpad materialfysik
Burakovsky, L. (author)
Preston, D. L. (author)
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 (creator_code:org_t)
2005
2005
English.
In: Physical Review Letters. - 0031-9007 .- 1079-7114. ; 94:19
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • The melting curve of MgSiO3 perovskite has been determined by means of ab initio molecular dynamics complemented by effective pair potentials, and a new phenomenological model of melting. Using first principles ground state calculations, we find that the MgSiO3 perovskite phase transforms into post perovskite at pressures above 100 GPa, in agreement with recent theoretical and experimental studies. We find that the melting curve of MgSiO3, being very steep at pressures below 60 GPa, rapidly flattens on increasing pressure. The experimental controversy on the melting of the MgSiO3 perovskite at high pressures is resolved, confirming the data by Zerr and Boehler.

Keyword

post-perovskite phase
abinitio molecular-dynamics
lower mantle
(mg,fe)sio3 perovskite
simulations
transition
temperatures
state
forsterite
equations

Publication and Content Type

ref (subject category)
art (subject category)

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