Research output: Contribution to journal › Article › peer-review
Calcium orthocarbonate, Ca2CO4-Pnma: A potential host for subducting carbon in the transition zone and lower mantle. / Sagatova, Dinara; Shatskiy, Anton; Sagatov, Nursultan et al.
In: Lithos, Vol. 370-371, 105637, 01.10.2020.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Calcium orthocarbonate, Ca2CO4-Pnma: A potential host for subducting carbon in the transition zone and lower mantle
AU - Sagatova, Dinara
AU - Shatskiy, Anton
AU - Sagatov, Nursultan
AU - Gavryushkin, Pavel N.
AU - Litasov, Konstantin D.
N1 - Funding Information: We thank the Information Technology Centre of Novosibirsk State University for providing access to the cluster computational resources. This study was financially supported by the Russian Foundation for Basic Research (project No 20-03-00774). AS was supported by the state assignment of IGM SB RAS . KDL was supported by the state assignment of IHPP RAS. Publisher Copyright: © 2020 Elsevier B.V. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/10/1
Y1 - 2020/10/1
N2 - A novel structure of calcium orthocarbonate Ca2CO4-Pnma has been discovered using ab-initio crystal structure prediction methods (AIRSS and USPEX) based on the density functional theory. This phase appears above 13 GPa and remains stable to at least 50 GPa and 2000 K according to the calculations within quasi-harmonic approximation. Thus, the discovered phase can be stable at Earth's transition zone and lower mantle P-T conditions. The carbon atoms in the discovered phase are presented in 4-fold coordination, and its structure is similar to the high-pressure and high-temperature α'H-Ca2SiO4 phase.
AB - A novel structure of calcium orthocarbonate Ca2CO4-Pnma has been discovered using ab-initio crystal structure prediction methods (AIRSS and USPEX) based on the density functional theory. This phase appears above 13 GPa and remains stable to at least 50 GPa and 2000 K according to the calculations within quasi-harmonic approximation. Thus, the discovered phase can be stable at Earth's transition zone and lower mantle P-T conditions. The carbon atoms in the discovered phase are presented in 4-fold coordination, and its structure is similar to the high-pressure and high-temperature α'H-Ca2SiO4 phase.
KW - CaCO
KW - Density functional theory
KW - Lower mantle
KW - Orthocarbonate
KW - Subduction
KW - Transitions zone
KW - HIGH-PRESSURE
KW - INCLUSIONS
KW - DIAMOND
KW - Otthocarbonate
KW - AB-INITIO
KW - CACO3
KW - POLYMORPHS
KW - BRAZIL
KW - PHASE
KW - Ca2CO4
KW - MINERALOGY
KW - ARAGONITE
UR - http://www.scopus.com/inward/record.url?scp=85087006099&partnerID=8YFLogxK
U2 - 10.1016/j.lithos.2020.105637
DO - 10.1016/j.lithos.2020.105637
M3 - Article
AN - SCOPUS:85087006099
VL - 370-371
JO - Lithos
JF - Lithos
SN - 0024-4937
M1 - 105637
ER -
ID: 24616967