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Goryainov S, Krylov A, Borodina U, Likhacheva A, Krylova S, Seryotkin Y, Bogdanov N, Vtyurin A, Grishina S. Raman study of decomposition of Na-bearing carbonates in water fluid at high P-T parameters. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 322:124801. [PMID: 39053118 DOI: 10.1016/j.saa.2024.124801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2023] [Revised: 07/02/2024] [Accepted: 07/08/2024] [Indexed: 07/27/2024]
Abstract
The study of Na-carbonates stability and their transformations in aqueous carbonate fluid under high P-T conditions is relevant from the point of view of the understanding geochemical processes of the Na-assisted carbon circulation in the Earth's crust and subduction zones. In situ Raman study of Na-bearing carbonate-water-Fe-metal system in diamond anvil cell (DAC) at high P-T conditions revealed that carbonates decompose with abiogenic formation of formates and other organic compounds that differs from behavior of carbonates in dry system. XRD and FTIR methods have been used additionally to determine the phase composition. Na-bearing carbonates (nahcolite NaHCO3, shortite Na2Ca2(CO3)3 and cancrinite Na7Ca[(CO3)1.5Al6Si6O24]⋅2H2O) in aqueous fluid decompose to form simple carbonates and formates (as dominant organic molecules) at moderate P-T parameters (above ∼0.2 GPa, 200 °C). Our experimental results directly confirm the hypothesis of Horita and Berndt (Science, 1999) about possible yield of organic formates in the carbonate-water-metal system. Nahcolite NaHCO3 in aqueous fluid in the presence of Fe metal decomposes into anhydrous phases: natrite γ-Na2CO3, siderite, magnetite (due to dissolution of Fe steel gasket), Na-formate and likely organic molecular crystalline solvate of Na-formate and methyl formate. Shortite decays into anhydrous phases: aragonite CaCO3, Na-Ca-formates and an amorphous phase. Cancrinite decomposes to unidentified carbonate-alumonosilicate phases, Na-Ca-formates and unknown organic molecular crystal. Magnetite is also formed in this system due to dissolution of Fe steel gasket used in DAC. The present study provides a new insight in processes of abiogenic formation of organic matter from carbonates in the crust and upper mantle.
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Affiliation(s)
- Sergey Goryainov
- Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, prospect Acad. Koptyug 3, Novosibirsk, 630090, Russia.
| | - Alexander Krylov
- Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, 50, bld. 38, Krasnoyarsk, 660036, Russia
| | - Ulyana Borodina
- Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, prospect Acad. Koptyug 3, Novosibirsk, 630090, Russia
| | - Anna Likhacheva
- Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, prospect Acad. Koptyug 3, Novosibirsk, 630090, Russia
| | - Svetlana Krylova
- Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, 50, bld. 38, Krasnoyarsk, 660036, Russia
| | - Yurii Seryotkin
- Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, prospect Acad. Koptyug 3, Novosibirsk, 630090, Russia
| | - Nikita Bogdanov
- Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, prospect Acad. Koptyug 3, Novosibirsk, 630090, Russia
| | - Alexander Vtyurin
- Kirensky Institute of Physics, Federal Research Center KSC SB RAS, Akademgorodok, 50, bld. 38, Krasnoyarsk, 660036, Russia
| | - Svetlana Grishina
- Sobolev Institute of Geology and Mineralogy, Siberian Branch of Russian Academy of Sciences, prospect Acad. Koptyug 3, Novosibirsk, 630090, Russia
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Tan BH, An H, Ohl CD. Body Forces Drive the Apparent Line Tension of Sessile Droplets. PHYSICAL REVIEW LETTERS 2023; 130:064003. [PMID: 36827583 DOI: 10.1103/physrevlett.130.064003] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 12/05/2022] [Indexed: 06/18/2023]
Abstract
The line tension of a three-phase contact line is implicated in a wide variety of interfacial phenomena, but there is ongoing controversy, with existing measurements spanning six orders of magnitude in both signs. Here, we show that computationally obtained magnitudes, sign changes, and nontrivial variations of apparent line tension can be faithfully reproduced in a parsimonious model that incorporates only liquid-substrate interactions. Our results suggest that the origin for the remarkable variation lies in the failure of a widely used estimation method to eliminate body forces, leading measured line tensions to behave like an extensive quantity.
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Affiliation(s)
- Beng Hau Tan
- KB Corporation, The Plaza, 7500A Beach Road, 199591, Singapore
| | - Hongjie An
- Queensland Micro and Nanotechnology Centre, Griffith University, 170 Kessels Road, Nathan, Queensland 4111, Australia
| | - Claus-Dieter Ohl
- Institute of Physics, Otto von Guericke University Magdeburg, Universitätsplatz 2, 39016 Magdeburg, Germany
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Wei-Hsin Sun E, Bourg IC. Impact of organic solutes on capillary phenomena in water-CO2-quartz systems. J Colloid Interface Sci 2022; 629:265-275. [DOI: 10.1016/j.jcis.2022.08.124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Revised: 08/17/2022] [Accepted: 08/18/2022] [Indexed: 11/29/2022]
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