scholarly journals Electronic spin state of ferric iron in Al-bearing perovskite in the lower mantle

2005 ◽  
Vol 32 (17) ◽  
Author(s):  
Li Li ◽  
John P. Brodholt ◽  
Stephen Stackhouse ◽  
Donald J. Weidner ◽  
Maria Alfredsson ◽  
...  
Keyword(s):  
Spin State ◽  
Lower Mantle ◽  
Ferric Iron ◽  
Electronic Spin

scholarly journals Electronic spin state of iron in lower mantle perovskite

2004 ◽  
Vol 101 (39) ◽  
pp. 14027-14030 ◽  
Author(s):  
J. Li ◽  
V. V. Struzhkin ◽  
H.-k. Mao ◽  
J. Shu ◽  
R. J. Hemley ◽  
...  
Keyword(s):  
Spin State ◽  
Lower Mantle ◽  
Electronic Spin

scholarly journals Low-spin ferric iron in primordial bridgmanite crystallized from a deep magma ocean

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yoshiyuki Okuda ◽  
Kenji Ohta ◽  
Yu Nishihara ◽  
Naohisa Hirao ◽  
Tatsuya Wakamatsu ◽  
...  
Keyword(s):  
Lower Mantle ◽  
Ferric Iron ◽  
Thermal Evolution ◽  
Spin Transition ◽  
Mantle Heterogeneity ◽  
Magma Ocean ◽  
Electronic Spin ◽  
Energy Domain ◽  
History Of ◽  
Open Question

AbstractThe crystallization of the magma ocean resulted in the present layered structure of the Earth’s mantle. An open question is the electronic spin state of iron in bridgmanite (the most abundant mineral on Earth) crystallized from a deep magma ocean, which has been neglected in the crystallization history of the entire magma ocean. Here, we performed energy-domain synchrotron Mössbauer spectroscopy measurements on two bridgmanite samples synthesized at different pressures using the same starting material (Mg0.78Fe0.13Al0.11Si0.94O3). The obtained Mössbauer spectra showed no evidence of low-spin ferric iron (Fe3+) from the bridgmanite sample synthesized at relatively low pressure of 25 gigapascals, while that directly synthesized at a higher pressure of 80 gigapascals contained a relatively large amount. This difference ought to derive from the large kinetic barrier of Fe3+ rearranging from pseudo-dodecahedral to octahedral sites with the high-spin to low-spin transition in experiments. Our results indicate a certain amount of low-spin Fe3+ in the lower mantle bridgmanite crystallized from an ancient magma ocean. We therefore conclude that primordial bridgmanite with low-spin Fe3+ dominated the deeper part of an ancient lower mantle, which would contribute to lower mantle heterogeneity preservation and call for modification of the terrestrial mantle thermal evolution scenarios.

Electronic spin state of Fe,Al-containing MgSiO3 perovskite at lower mantle conditions

Lithos ◽  
2014 ◽  
Vol 189 ◽  
pp. 167-172 ◽  
Author(s):  
I. Kupenko ◽  
C. McCammon ◽  
R. Sinmyo ◽  
C. Prescher ◽  
A.I. Chumakov ◽  
...  
Keyword(s):  
Spin State ◽  
Lower Mantle ◽  
Mgsio3 Perovskite ◽  
Electronic Spin

Effect of composition, structure, and spin state on the thermal conductivity of the Earth's lower mantle

2010 ◽  
Vol 180 (3-4) ◽  
pp. 148-153 ◽  
Author(s):  
A.F. Goncharov ◽  
V.V. Struzhkin ◽  
J.A. Montoya ◽  
S. Kharlamova ◽  
R. Kundargi ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Spin State ◽  
Lower Mantle ◽  
Composition Structure

Iron spin state in silicate glass at high pressure: Implications for melts in the Earthʼs lower mantle

2014 ◽  
Vol 385 ◽  
pp. 130-136 ◽  
Author(s):  
C. Prescher ◽  
C. Weigel ◽  
C. McCammon ◽  
O. Narygina ◽  
V. Potapkin ◽  
...  
Keyword(s):  
High Pressure ◽  
Silicate Glass ◽  
Spin State ◽  
Lower Mantle

Spin state and electronic environment of iron in basaltic glass in the lower mantle

2017 ◽  
Vol 102 (10) ◽  
pp. 2106-2112 ◽  
Author(s):  
Fumiya Maeda ◽  
Seiji Kamada ◽  
Eiji Ohtani ◽  
Naohisa Hirao ◽  
Takaya Mitsui ◽  
...  
Keyword(s):  
Spin State ◽  
Lower Mantle ◽  
Basaltic Glass ◽  
Electronic Environment

Electronic, spin-state, and magnetic transitions inBa2Co9O14investigated by x-ray spectroscopies and neutron diffraction

2017 ◽  
Vol 95 (23) ◽  
Author(s):  
J. Herrero-Martín ◽  
J. Padilla-Pantoja ◽  
S. Lafuerza ◽  
A. Romaguera ◽  
F. Fauth ◽  
...  
Keyword(s):  
Neutron Diffraction ◽  
Spin State ◽  
Magnetic Transitions ◽  
X Ray ◽  
Electronic Spin
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