Shift of CO2-I absorption bands in diamond: A pressure or compositional effect? A FTIR mapping study

Barannik, Evgenii P.; Shiryaev, A. A.; Hainschwang, Thomas

doi:10.1016/j.diamond.2021.108280

Cited by 8 publications

(15 citation statements)

References 36 publications

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“…Note, however, that in the spectra of our samples, the bending mode m 2 at 658 cm À1 shows only marginal Davydov splitting, thus indicating that the CO 2 ice in the inclusions is disordered and/or contains impurities (e.g., H 2 O, N 2 , etc.). Subsequently, estimation of the residual pressure of the CO 2 inclusions from the spectroscopic data is ambiguous (Barannik et al, 2021). In addition, the quoted position of the bending m 2 mode almost coincides with the position at atmospheric pressure, thus being in contrast with the m 3 band.…”

Section: Infrared Spectroscopymentioning

confidence: 95%

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Structural peculiarities, mineral inclusions, and point defects in yakutites—A variety of impact‐related diamond

Shiryaev

Pavlushin

Pakhnevich

et al. 2022

Meteorit & Planetary Scien

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An unusual variety of impact-related diamond from the Popigai impact structure -yakutites-is characterized by complementary methods including optical microscopy, X-ray diffraction, radiography and tomography, infrared, Raman, and luminescence spectroscopy providing structural information at widely different scales. It is shown that relatively large graphite aggregates may be transformed to diamond with preservation of many morphological features. Spectroscopic and X-ray diffraction data indicate that the yakutite matrix represents bulk nanocrystalline diamond. For the first time, features of twophonon IR absorption spectra of bulk nanocrystalline diamond are interpreted in the framework of phonon dispersion curves. Luminescence spectra of yakutite are dominated by dislocation-related defects. Optical microscopy supported by X-ray diffraction reveals the presence of single crystal diamonds with sizes of up to several tens of microns embedded into nanodiamond matrix. The presence of single crystal grains in impact diamond may be explained by chemical vapor deposition-like growth in a transient cavity and/or a secondslong compression stage of the impact process due to slow pressure release in a volatile-rich target. For the first time, protogenetic mineral inclusions in yakutites represented by mixed monoclinic and tetragonal ZrO 2 are observed. This implies the presence of baddeleyite in target rocks responsible for yakutite formation.

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Section: Infrared Spectroscopymentioning

confidence: 95%

“…H2O, N2, etc). Subsequently, estimation of the residual pressure of the CO2 inclusions from the spectroscopic data is ambiguous (Barannik et al 2021). In addition, the quoted position of the bending ν2 mode almost coincide with the position at atmospheric pressure, thus being in contrast with the ν3 band.…”

Section: Infra-red Spectroscopymentioning

confidence: 99%

Structural peculiarities, mineral inclusions, and point defects in yakutites—A variety of impact‐related diamond

Shiryaev

Pavlushin

Pakhnevich

et al. 2022

Meteorit & Planetary Scien

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“…Te broad peak of 3000-3500 cm −1 and the characteristic peaks around 1620 cm −1 are attributed to the surface water molecules of zinc stannate or the vibration of − OH bonds in crystal water [26]. Te characteristic peak around 2341 cm −1 is attributed to CO 2 adsorbed on the catalyst surface [27,28]. Te peak around 1176 cm −1 is related to the vibration of the zinc stannate zinc Sn-OH bond, and the characteristic peaks of 540 cm −1 and 779 cm −1 are attributed to the internal structure of zinc stannate and O-vibration, respectively, [26,29].…”

Section: Ftir Analysis Of Diferent Shapes Of Zinc Stannatementioning

confidence: 99%

Photodegradation of Methylene Blue Using Carbon-Doped ZnSn(OH)6 Composite Coated on Membrane

Fenelon

Ni’am

Nguyen

et al. 2023

Journal of Chemistry

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The dye contamination of water is a global concern in the environment. In this study, the photocatalytic technology and membrane module were combined to improve the surface distribution of the active species of the catalyst for better degradation of the methylene blue (MB) dye under visible light. ZnSn(OH)6 was chosen due to carbon’s complex metal oxide doped to facilitate the application under visible light. The numerous characterizations were analyzed in the composites to verify the consistency of the optimum degradation of MB over the catalyst coated on the membrane. During the preparation of the ZnSn(OH)6 composite, the results confirmed that different reaction times and amounts of sodium hydroxide significantly affected the pollutant’s degradation. The carbon-doped composite denoted the largest surface area and increased the catalyst’s reactive sites on the membrane. The photocatalytic activity test showed that 1% carbon doped on ZnSn(OH)6 prepared at 160°C by hydrothermal method coated on the membrane had the optimal degradation of 89.74% of MB. This study contributes to the ongoing study and development of photocatalytic membranes for the photodegradation of wastewater treatment.

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“…The presence of CO 2 fluid during crystallization of some lithospheric diamonds is evidenced by findings of solid (Schrauder and Navon 1993;Chinn 1995;Barannik et al 2021) and liquid CO 2 (Tomilenko et al 2001;Smith et al 2015) inclusions in natural diamonds. Systematic studies of CO 2 -bearing diamonds revealed inclusions of eclogitic minerals (Chinn 1995;Ragozin et al 2002;Ragozin et al 2009).…”

Section: Introductionmentioning

confidence: 99%

The equilibrium boundary of the reaction Mg3Al2Si3O12 + 3CO2 = Al2SiO5 + 2SiO2 + 3MgCO3 at 3–6 GPa

Vinogradova,

Shatskiy,

Arefiev

et al. 2024

American Mineralogist

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The stability of CO 2 fluid in the Earth's mantle is restricted by the carbonation of rockforming minerals. Among those, the reaction with garnet is of particular interest because it constrains the stability of CO 2 fluid in eclogites, whose minerals have been found in the CO 2 -bearing diamonds. In this work, we determined the equilibrium boundary for the reaction Mg 3 Al 2 Si 3 O 12 (Prp) + 3CO 2 (F) = Al 2 SiO 5 (Ky) + 2SiO 2 (Coe/Qz) + 3MgCO 3 (Mgs) over the pressure interval 3-6 GPa using a multianvil press. Owing to the slow kinetics, the reaction was studied in both forward (left to right) and reverse (right to left) directions in experiments with durations extending up to 260 h. Our newly determined boundary is situated 3 GPa / 950±50 °C, 4.5 GPa / 1075±25 °C, and 6 GPa / 1250±50 °C and has the equation P(GPa) = 0.0099×T (°C) + 6.3165. The boundary crosses the This is the peer-reviewed, final accepted version for American Mineralogist, published by the Mineralogical Society of America.The published version is subject to change. Cite as Authors (Year) Title. American Mineralogist, in press.

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Shift of CO2-I absorption bands in diamond: A pressure or compositional effect? A FTIR mapping study

Cited by 8 publications

References 36 publications

Structural peculiarities, mineral inclusions, and point defects in yakutites—A variety of impact‐related diamond

Structural peculiarities, mineral inclusions, and point defects in yakutites—A variety of impact‐related diamond

Photodegradation of Methylene Blue Using Carbon-Doped ZnSn(OH)6 Composite Coated on Membrane

The equilibrium boundary of the reaction Mg3Al2Si3O12 + 3CO2 = Al2SiO5 + 2SiO2 + 3MgCO3 at 3–6 GPa

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