Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
High pressure Raman study of Na4Ca(CO3)3 from the ambient pressure to 11 GPa. / Rashchenko, Sergey; Kolesnichenko, Maria; Mikhno, Anastasia и др.
в: High Pressure Research, Том 43, № 3, 2023, стр. 205-214.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - High pressure Raman study of Na4Ca(CO3)3 from the ambient pressure to 11 GPa
AU - Rashchenko, Sergey
AU - Kolesnichenko, Maria
AU - Mikhno, Anastasia
AU - Shatskiy, Anton
N1 - The research was supported by a Russian Science Foundation (grant number 21-77-00016). Authors acknowledge Anastasia Brazhnikova for participation in data collection. Diffraction experiments were carried at the European Synchrotron Radiation Facility and supported by approval of ESRF Proposal ES-810.
PY - 2023
Y1 - 2023
N2 - Na-Ca double carbonates were found as the inclusions in ‘superdeep’ Juina diamonds and as the products of high pressure experiments and thus are regarded as the potential host of CO2 in the deep mantle. Recently, Na-rich carbonate (21.0% wt. of Na2O vs. 13.6% wt. of CaO) was reported as the product of experiment with carbonated eclogite treated at 21 GPa and 1200°C. Na/Ca ratio of this carbonate corresponds to Na4Ca(CO3)3 phase with cubic symmetry synthesized at 6 GPa. The stability of Na4Ca(CO3)3 at higher pressures has not been investigated yet. Herein, we report an in situ Raman study of Na4Ca(CO3)3 carbonate up to 11 GPa in order to reveal stability of its structure at mantle pressures. Obtained results strongly imply for reversible phase transition near 8 GPa associated with decrease of symmetry. The observed phase transition questions the stability of cubic Na4Ca(CO3)3 under conditions of mantle transition zone.
AB - Na-Ca double carbonates were found as the inclusions in ‘superdeep’ Juina diamonds and as the products of high pressure experiments and thus are regarded as the potential host of CO2 in the deep mantle. Recently, Na-rich carbonate (21.0% wt. of Na2O vs. 13.6% wt. of CaO) was reported as the product of experiment with carbonated eclogite treated at 21 GPa and 1200°C. Na/Ca ratio of this carbonate corresponds to Na4Ca(CO3)3 phase with cubic symmetry synthesized at 6 GPa. The stability of Na4Ca(CO3)3 at higher pressures has not been investigated yet. Herein, we report an in situ Raman study of Na4Ca(CO3)3 carbonate up to 11 GPa in order to reveal stability of its structure at mantle pressures. Obtained results strongly imply for reversible phase transition near 8 GPa associated with decrease of symmetry. The observed phase transition questions the stability of cubic Na4Ca(CO3)3 under conditions of mantle transition zone.
KW - Na-carbonates
KW - Raman spectroscopy
KW - deep carbon cycle
KW - diamond anvil cell
KW - high pressure
UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85161570401&origin=inward&txGid=ba38deebfd8f3ade06f142768208d89e
UR - https://www.mendeley.com/catalogue/e6c15318-0c03-3f3c-bddd-c75f44cf40f8/
U2 - 10.1080/08957959.2023.2218535
DO - 10.1080/08957959.2023.2218535
M3 - Article
VL - 43
SP - 205
EP - 214
JO - High Pressure Research
JF - High Pressure Research
SN - 0895-7959
IS - 3
ER -
ID: 56585903