Manganese-calcium intermixing facilitates heteroepitaxial growth at the <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si3.gif" overflow="scroll"><mml:mfenced open="(" close=")"><mml:mrow><mml:mn>10</mml:mn><mml:mover accent="false"><mml:mn>1</mml:mn><mml:mo>¯</mml:mo></mml:mover><mml:mn>4</mml:mn></mml:mrow></mml:mfenced></mml:math> calcite-water interface

Xu, Man; Riechers, Shawn L.; Ilton, Eugene S.; Du, Yingge; Kovařík, Libor; Varga, Tamás; Arey, Bruce W.; Qafoku, Odeta; Kerisit, Sebastien N.

doi:10.1016/j.chemgeo.2017.09.001

Cited by 18 publications

(9 citation statements)

References 45 publications

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“…EDS analyses indicated that the acicular crystals or hexagonal prisms clearly had a higher Mn content than the bulk composition of the original solid (Additional file 1: Appendix S5). The rhodochrosite precipitate was monocrystalline [20,29]. It was also observed that some rod-like phases formed during the interaction between the calcite crystals and Mn 2+ solution [30,31].…”

Section: Semmentioning

confidence: 92%

Dissolution and solubility of calcite-rhodochrosite solid solutions [(Ca1-xMnx)CO3] at 25 °C

Zhu

Nong

et al. 2021

Geochem Trans

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A complete series of calcite-rhodochrosite solid solutions [(Ca1-xMnx)CO3] are prepared, and their dissolution processes in various water samples are experimentally investigated. The crystal morphologies of the solid solutions vary from blocky spherical crystal aggregates to smaller spheres with an increasing incorporation of Mn in the solids. Regarding dissolution in N2-degassed water, air-saturated water and CO2-saturated water at 25 °C, the aqueous Ca and Mn concentrations reach their highest values after 1240–2400 h, 6–12 h and < 1 h, respectively, and then decrease gradually to a steady state; additionally, the ion activity products (log_IAP) at the final steady state (≈ solubility products in log_Ksp) are estimated to be − 8.46 ± 0.06, − 8.44 ± 0.10 and − 8.59 ± 0.10 for calcite [CaCO3], respectively, and − 10.25 ± 0.08, − 10.26 ± 0.10 and − 10.28 ± 0.03, for rhodochrosite [MnCO3], respectively. As XMn increases, the log_IAP values decrease from − 8.44 ~ − 8.59 for calcite to − 10.25 ~ − 10.28 for rhodochrosite. The aqueous Mn concentrations increase with an increasing Mn/(Ca + Mn) molar ratio (XMn) of the (Ca1-xMnx)CO3 solid solutions, while the aqueous Ca concentrations show the highest values at XMn = 0.53–0.63. In the constructed Lippmann diagram of subregular (Ca1-xMnx)CO3 solid solutions, the solids dissolve incongruently, and the data points of the aqueous solutions move progressively up to the Lippmann solutus curve and then along the solutus curve or saturation curve of pure MnCO3 to the Mn-poor side. The microcrystalline cores of the spherical crystal aggregates are preferentially dissolved to form core hollows while simultaneously precipitating Mn-rich hexagonal prisms.

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Section: Semmentioning

confidence: 92%

Dissolution and solubility of calcite-rhodochrosite solid solutions [(Ca1-xMnx)CO3] at 25 °C

Zhu

Nong

et al. 2021

Geochem Trans

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“…Положение компонент фотоэлектронной линии Mn 2p 3/2 при 640 эВ, 642 эВ и 643,5 эВ, согласно (Peng et al, 2013;Ilton et al, 2016), соответствует MnCO 3 и MnO. Образование карбоната марганца наблюдалось и при адсорбции Mn 2+ из водного раствора на поверхности кальцита (Xu et al, 2017). Наблюдаемое отличие от Со, в случае которого образуется не карбонат, а оксиды СоО и Со 3 О 4 (рис.…”

Section: результаты и их обсуждениеunclassified

“…Показано, в частности, что двухвалентные катионы металлов в одном случае образуют поверхностные гидратированные комплексы, в другом -проникают в решетку кальцита с образованием поверхностных слоев карбонатов. В недавних работах (Xu et al, 2017;Xu et al, 2015) показано, например, что при адсорбции Mn 2+ , Cd 2+ из водного раствора на поверхности CaCO 3 (1014) образуется ИССЛЕДОВАНИЕ ВЗАИМОДЕЙСТВИЯ АТОМОВ Co, Mn, Fe С КАЛЬЦИТОМ МЕТОДОМ РЕНТГЕНОВСКОЙ ФОТОЭЛЕКТРОННОЙ СПЕКТРОСКОПИИ структурно согласованный с подложкой упорядоченный тонкий слой карбонатов металлов, несмотря на несогласованность постоянных решеток подложки и адсорбата. Формирование таких упорядоченных структур происходит в результате релаксации напряжений при росте пленки из раствора и образовании твердых растворов на границе раздела, имеющих состав, отличающийся от термодинамически стабильных фаз соответствующих массивных материалов.…”

Section: Introductionunclassified

Investigation of interaction of Co, Mn and Fe atoms with the calcite by X-ray photoelectron spectroscopy

et al. 2019

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Adsorption of atoms of Co, Mn, Fe on the calcite surface in ultra-high vacuum and the interaction of the formed adsorption systems with the water have been studied by means of X-ray photoelectron spectroscopy. It is shown that Mn and Fe form solid solutions CaCO3/Mn(Fe)CO3 on the calcite surface, whereas Co preferentially forms CoO and Co3O4. Upon interaction with water the surface compounds formed by Mn and Fe do not undergo notable changes, unlike the Co oxides which partially transform into soluble hydroxylated complexes.

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“…These abiogenic CaCO 3 minerals, composed of aragonite and high-magnesium calcite in shoal-shallow marine environments [4][5][6], typically form either as heterogeneously precipitated primary marine cements or through post-depositional and diagenetic reactions [1]. In order to further understand the lack of abiogenic CaCO 3 in the modern ocean, many efforts have been conducted to ascertain factors which affect the precipitation of abiogenic CaCO 3 [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Heterogeneous Nucleation and Growth of CaCO3 on Calcite (104) and Aragonite (110) Surfaces: Implications for the Formation of Abiogenic Carbonate Cements in the Ocean

Hong-mei

Huang

et al. 2020

Minerals

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Although near-surface seawater is supersaturated with CaCO3, only a minor part of it is abiogenic (e.g., carbonate cements). The possible reason for such a phenomenon has attracted much attention in the past decades. Substrate effects on the heterogeneous nucleation and growth of CaCO3 at various Mg2+/Ca2+ ratios may contribute to the understanding of the origin of abiogenic CaCO3 cements. Here, we used in situ atomic force microscopy (AFM), scanning electron microscopy (SEM), X-ray diffraction (XRD) and Raman spectroscopy to study the heterogeneous nucleation and growth of CaCO3 on both calcite (104) and aragonite (110) surfaces. The results show that (1) calcite spiral growth occurs on calcite (104) surfaces by monomer-by-monomer addition; (2) the aggregative growth of aragonite appears on aragonite (110) surfaces through a substrate-controlled oriented attachment (OA) along the [001] direction, followed by the formation of elongated columnar aragonite; and (3) Mg2+ inhibits the crystallization of both calcite and aragonite without impacting on crystallization pathways. These findings disclose that calcite and aragonite substrates determine the crystallization pathways, while the Mg2+/Ca2+ ratios control the growth rate of CaCO3, indicating that both types of CaCO3 substrate in shallow sediments and aqueous Mg2+/Ca2+ ratios constrain the deposition of abiogenic CaCO3 cements in the ocean.

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Manganese-calcium intermixing facilitates heteroepitaxial growth at the 101¯4 calcite-water interface

Cited by 18 publications

References 45 publications

Dissolution and solubility of calcite-rhodochrosite solid solutions [(Ca1-xMnx)CO3] at 25 °C

Dissolution and solubility of calcite-rhodochrosite solid solutions [(Ca1-xMnx)CO3] at 25 °C

Investigation of interaction of Co, Mn and Fe atoms with the calcite by X-ray photoelectron spectroscopy

Heterogeneous Nucleation and Growth of CaCO3 on Calcite (104) and Aragonite (110) Surfaces: Implications for the Formation of Abiogenic Carbonate Cements in the Ocean

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