The system Na2CO3-FeCO3at 6 GPa and its relation to the system Na2CO3-FeCO3-MgCO3

Anton Shatskiy; Sergey V. Rashchenko; Eiji Ohtani; Konstantin D. Litasov; Mikhail V. Khlestov; Yuri M. Borzdov; Igor N. Kupriyanov; Igor S. Sharygin; Yuri N. Palyanov

doi:10.2138/am-2015-4777

The system Na₂CO₃-FeCO₃at 6 GPa and its relation to the system Na₂CO₃-FeCO₃-MgCO₃

Anton Shatskiy, Sergey V. Rashchenko, Eiji Ohtani, Konstantin D. Litasov, Mikhail V. Khlestov, Yuri M. Borzdov, Igor N. Kupriyanov, Igor S. Sharygin, Yuri N. Palyanov

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

The phase relations in the Na₂CO₃-(Fe_0.87Mn_0.06Mg_0.07)CO₃ system have been studied in Kawai-type multi-anvil experiments using graphite capsules at 6.0 GPa and 900-1400 °C. Subsolidus assemblages comprise the stability fields of Na₂CO₃ + Na₂Fe(CO₃)₂ and Na₂Fe(CO₃)₂ + siderite with the transition boundary at X(Na₂CO₃) = 50 mol%. Intermediate Na₂Fe(CO₃)₂ compound has rhombohedral R3 eitelite structure with cell parameters a = 4.9712(16), c = 16.569(4) A˚, V = 354.61(22). The Na₂CO₃- Na₂Fe(CO₃)₂ eutectic is established at 1000 °C and 66 mol% Na₂CO₃· Na₂Fe(CO₃)₂ disappears between 1000 and 1100 °C via incongruent melting to siderite and a liquid containing about 55 mol% Na₂CO₃. Siderite remains a subliquidus phase at 1400 °C at X(Na₂CO₃) ≤ 30 mol%. The ternary Na₂CO₃-FeCO₃-MgCO₃ system can be built up from the corresponding binary systems: two systems with intermediate Na₂(Mg, Fe)(CO₃)₂ phase, which melts congruently at the Mg-rich side and incongruently at the Fe-rich side, and the (Mg, Fe)CO₃ system with complete solid solution. The phase relations suggest that the maximum contribution of FeCO₃ component into the lowering solidus temperatures of Na-bearing carbonated mantle domains could not exceed several tens of degrees Celsius.

Original language	English
Pages (from-to)	130-137
Number of pages	8
Journal	American Mineralogist
Volume	100
Issue number	1
DOIs	https://doi.org/10.2138/am-2015-4777
Publication status	Published - 2015 Jan 1
Externally published	Yes

Keywords

Carbonatite
Eitelite
High-pressure experiment
Mantle
Melting
Natrite
Phase relations
Siderite

ASJC Scopus subject areas

Geophysics
Geochemistry and Petrology

Access to Document

10.2138/am-2015-4777

Cite this

The system Na₂CO₃-FeCO₃at 6 GPa and its relation to the system Na₂CO₃-FeCO₃-MgCO₃. / Shatskiy, Anton; Rashchenko, Sergey V.; Ohtani, Eiji; Litasov, Konstantin D.; Khlestov, Mikhail V.; Borzdov, Yuri M.; Kupriyanov, Igor N.; Sharygin, Igor S.; Palyanov, Yuri N.

In: American Mineralogist, Vol. 100, No. 1, 01.01.2015, p. 130-137.

Research output: Contribution to journal › Article › peer-review

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abstract = "The phase relations in the Na2CO3-(Fe0.87Mn0.06Mg0.07)CO3 system have been studied in Kawai-type multi-anvil experiments using graphite capsules at 6.0 GPa and 900-1400 °C. Subsolidus assemblages comprise the stability fields of Na2CO3 + Na2Fe(CO3)2 and Na2Fe(CO3)2 + siderite with the transition boundary at X(Na2CO3) = 50 mol%. Intermediate Na2Fe(CO3)2 compound has rhombohedral R3 eitelite structure with cell parameters a = 4.9712(16), c = 16.569(4) A˚, V = 354.61(22). The Na2CO3- Na2Fe(CO3)2 eutectic is established at 1000 °C and 66 mol% Na2CO3· Na2Fe(CO3)2 disappears between 1000 and 1100 °C via incongruent melting to siderite and a liquid containing about 55 mol% Na2CO3. Siderite remains a subliquidus phase at 1400 °C at X(Na2CO3) ≤ 30 mol%. The ternary Na2CO3-FeCO3-MgCO3 system can be built up from the corresponding binary systems: two systems with intermediate Na2(Mg, Fe)(CO3)2 phase, which melts congruently at the Mg-rich side and incongruently at the Fe-rich side, and the (Mg, Fe)CO3 system with complete solid solution. The phase relations suggest that the maximum contribution of FeCO3 component into the lowering solidus temperatures of Na-bearing carbonated mantle domains could not exceed several tens of degrees Celsius.",

keywords = "Carbonatite, Eitelite, High-pressure experiment, Mantle, Melting, Natrite, Phase relations, Siderite",

author = "Anton Shatskiy and Rashchenko, {Sergey V.} and Eiji Ohtani and Litasov, {Konstantin D.} and Khlestov, {Mikhail V.} and Borzdov, {Yuri M.} and Kupriyanov, {Igor N.} and Sharygin, {Igor S.} and Palyanov, {Yuri N.}",

note = "Funding Information: We thank Oliver Tschauner for editorial handling and useful suggestions. We gratefully acknowledge anonymous reviewers for comments that help to improve the manuscript. This work was supported by the Russian Scientific Fund (proposal no. 14-17-00609) and performed under the project of the Ministry of Education and Science of Russian Federation (no. 14.B25.31.0032). The work was carried out involving the equipment belonging to the Siberian Synchrotron and Terahertz Radiation Center (Novosibirsk, Russia). Publisher Copyright: {\textcopyright} 2015, Walter de Gruyter GmbH. All rights reserved.",

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T1 - The system Na2CO3-FeCO3at 6 GPa and its relation to the system Na2CO3-FeCO3-MgCO3

AU - Shatskiy, Anton

AU - Rashchenko, Sergey V.

AU - Ohtani, Eiji

AU - Litasov, Konstantin D.

AU - Khlestov, Mikhail V.

AU - Borzdov, Yuri M.

AU - Kupriyanov, Igor N.

AU - Sharygin, Igor S.

AU - Palyanov, Yuri N.

N1 - Funding Information: We thank Oliver Tschauner for editorial handling and useful suggestions. We gratefully acknowledge anonymous reviewers for comments that help to improve the manuscript. This work was supported by the Russian Scientific Fund (proposal no. 14-17-00609) and performed under the project of the Ministry of Education and Science of Russian Federation (no. 14.B25.31.0032). The work was carried out involving the equipment belonging to the Siberian Synchrotron and Terahertz Radiation Center (Novosibirsk, Russia). Publisher Copyright: © 2015, Walter de Gruyter GmbH. All rights reserved.

PY - 2015/1/1

Y1 - 2015/1/1

N2 - The phase relations in the Na2CO3-(Fe0.87Mn0.06Mg0.07)CO3 system have been studied in Kawai-type multi-anvil experiments using graphite capsules at 6.0 GPa and 900-1400 °C. Subsolidus assemblages comprise the stability fields of Na2CO3 + Na2Fe(CO3)2 and Na2Fe(CO3)2 + siderite with the transition boundary at X(Na2CO3) = 50 mol%. Intermediate Na2Fe(CO3)2 compound has rhombohedral R3 eitelite structure with cell parameters a = 4.9712(16), c = 16.569(4) A˚, V = 354.61(22). The Na2CO3- Na2Fe(CO3)2 eutectic is established at 1000 °C and 66 mol% Na2CO3· Na2Fe(CO3)2 disappears between 1000 and 1100 °C via incongruent melting to siderite and a liquid containing about 55 mol% Na2CO3. Siderite remains a subliquidus phase at 1400 °C at X(Na2CO3) ≤ 30 mol%. The ternary Na2CO3-FeCO3-MgCO3 system can be built up from the corresponding binary systems: two systems with intermediate Na2(Mg, Fe)(CO3)2 phase, which melts congruently at the Mg-rich side and incongruently at the Fe-rich side, and the (Mg, Fe)CO3 system with complete solid solution. The phase relations suggest that the maximum contribution of FeCO3 component into the lowering solidus temperatures of Na-bearing carbonated mantle domains could not exceed several tens of degrees Celsius.

AB - The phase relations in the Na2CO3-(Fe0.87Mn0.06Mg0.07)CO3 system have been studied in Kawai-type multi-anvil experiments using graphite capsules at 6.0 GPa and 900-1400 °C. Subsolidus assemblages comprise the stability fields of Na2CO3 + Na2Fe(CO3)2 and Na2Fe(CO3)2 + siderite with the transition boundary at X(Na2CO3) = 50 mol%. Intermediate Na2Fe(CO3)2 compound has rhombohedral R3 eitelite structure with cell parameters a = 4.9712(16), c = 16.569(4) A˚, V = 354.61(22). The Na2CO3- Na2Fe(CO3)2 eutectic is established at 1000 °C and 66 mol% Na2CO3· Na2Fe(CO3)2 disappears between 1000 and 1100 °C via incongruent melting to siderite and a liquid containing about 55 mol% Na2CO3. Siderite remains a subliquidus phase at 1400 °C at X(Na2CO3) ≤ 30 mol%. The ternary Na2CO3-FeCO3-MgCO3 system can be built up from the corresponding binary systems: two systems with intermediate Na2(Mg, Fe)(CO3)2 phase, which melts congruently at the Mg-rich side and incongruently at the Fe-rich side, and the (Mg, Fe)CO3 system with complete solid solution. The phase relations suggest that the maximum contribution of FeCO3 component into the lowering solidus temperatures of Na-bearing carbonated mantle domains could not exceed several tens of degrees Celsius.

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KW - Eitelite

KW - High-pressure experiment

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KW - Natrite

KW - Phase relations

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