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Zhu H, Wen Y, Shang Q, Chen X, Huang Y, Liu P, Wang C, Yang X. Attapulgite/oyster shell composite reduces cadmium and lead bioavailability in acidic agricultural soils through synergistic adsorption and pH regulation. Sci Rep 2025; 15:15609. [PMID: 40320427 PMCID: PMC12050295 DOI: 10.1038/s41598-025-00302-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2025] [Accepted: 04/28/2025] [Indexed: 05/07/2025] Open
Abstract
Heavy metal contamination in acidified agricultural soils poses significant environmental and health risks. This study presents the development of a cost-effective dual-functional adsorbent, the attapulgite-oyster shell (ATP-OS) composite, engineered for the simultaneous removal of co-contaminated Cd(II) and Pb(II) ions. The ATP-OS composite was synthesized through thermal treatment at 700 °C, facilitating a synergistic interaction between attapulgite (ATP) and oyster shell (OS) powders. Characterization revealed enhanced dispersibility, increased active site density, and an expanded specific surface area, contributing to superior adsorption capacities of 197 mg g-1 for Cd(II) and 1459 mg g-1 for Pb(II), outperforming conventional adsorbents. Kinetic studies indicated that Pb(II) adsorption occurred at a significantly faster rate than Cd(II), with the adsorption processes aligning well with the pseudo-second-order model, suggesting chemisorption as the primary mechanism. Langmuir isotherm analysis confirmed monolayer adsorption behavior for both metal ions, corroborating the formation of stable PbCO3 and CdCO3 precipitates on the adsorbent surface. The composite demonstrated high adsorption efficiency across a broad pH range, despite significant influences from increased environmental pH and competitive adsorption by co-existing metal ions, underscoring its robustness in complex environmental conditions. In practical applications, ATP-OS demonstrated significant pH-neutralizing abilities, increasing soil pH values by 2.30-3.07 units and effectively reducing the concentrations and bioavailability of Cd(II) and Pb(II) in acidic agricultural soils. This study highlights the ATP-OS composite's potential as an effective solution for mitigating heavy metal pollution in agricultural settings, contributing to sustainable soil management practices.
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Affiliation(s)
- Hongyan Zhu
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China
- Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, Institute of Functional Materials and Agricultural Applied Chemistry, College of Chemistry and Material, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China
| | - Yangping Wen
- Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, Institute of Functional Materials and Agricultural Applied Chemistry, College of Chemistry and Material, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China
| | - Qingyin Shang
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China
| | - Xinyu Chen
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China
- Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, Institute of Functional Materials and Agricultural Applied Chemistry, College of Chemistry and Material, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China
| | - Yuzhen Huang
- Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, Institute of Functional Materials and Agricultural Applied Chemistry, College of Chemistry and Material, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China
| | - Peiyue Liu
- Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, Institute of Functional Materials and Agricultural Applied Chemistry, College of Chemistry and Material, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China
| | - Chengcheng Wang
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China
| | - Xiuxia Yang
- College of Land Resources and Environment, Jiangxi Agricultural University, Nanchang, 330045, People's Republic of China.
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2
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Santamaría-Pérez D, Chuliá-Jordán R, Botan-Neto BD, Bera G, Pellicer-Porres J, Bayarjargal L, Otero-de-la-Roza A, Popescu C. Pressure-driven phase transformations on Mg 3Ca(CO 3) 4 huntite carbonate. Phys Chem Chem Phys 2025; 27:3320-3329. [PMID: 39853124 DOI: 10.1039/d4cp04200j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2025]
Abstract
Magnesium and calcium carbonate minerals are significant reservoirs of Earth's carbon and understanding their behavior under different conditions is crucial for elucidating the mechanisms of deep carbon storage. Huntite, Mg3Ca(CO3)4, is one of the two stable calcium magnesium carbonate phases, together with dolomite. The distinctive cation coordination environment of Ca atoms compared to calcite-type and dolomite structures makes huntite a comparatively less dense phase. Here we examine the behavior of a polycrystalline natural huntite sample under room-temperature compression up to 38 GPa. Synchrotron X-ray diffraction and Raman spectroscopy experiments were carried out in a diamond-anvil cell using He as a highly hydrostatic pressure transmitting medium. XRD results suggest that the initial R32 huntite structure persists up to 21 GPa. The Raman experiment agrees with this result but also suggests the appearance of structural defects from 10 GPa on. Birch-Murnaghan equation of state parameters were fit to the pressure-volume huntite data resulting in zero-pressure volume V0 of 611.7(2) Å3, a bulk modulus B0 of 99.5(11) GPa and a pressure derivative of the bulk modulus of . At 21 GPa, huntite transforms to another trigonal phase (R3), designated here as huntite II. This phase persists up to at least 38 GPa, the maximum pressure reached in this study. The major structural differences between huntite and the huntite-II phase involve the tilting of the [CO3] units with respect to the basal plane and a rotation, which cause a progressive change in the coordination number of the Ca atoms, from 6 to 9. DFT calculations complement the experimental data, providing new insights into the structural response to high-pressure conditions of this magnesium-calcium double carbonate mineral.
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Affiliation(s)
- David Santamaría-Pérez
- Departamento de Física Aplicada-ICMUV, MALTA Consolider Team, Universitat de València, Valencia 46100, Spain.
| | - Raquel Chuliá-Jordán
- Departamento de Didáctica de las Ciencias Experimentales y Sociales, Universitat de Valencia, 46022, Valencia, Spain
| | | | - Ganesh Bera
- Departamento de Física Aplicada-ICMUV, MALTA Consolider Team, Universitat de València, Valencia 46100, Spain.
| | - Julio Pellicer-Porres
- Departamento de Física Aplicada-ICMUV, MALTA Consolider Team, Universitat de València, Valencia 46100, Spain.
| | | | - Alberto Otero-de-la-Roza
- Departamento de Química Física y Analítica, Facultad de Química, MALTA Consolider Team, Universidad de Oviedo, Oviedo 33006, Spain
| | - Catalin Popescu
- CELLS-ALBA Synchrotron Light Facility, Cerdanyola del Vallés, 08290, Barcelona, Spain
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3
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Santamaría-Pérez D, Chuliá-Jordán R, Gonzalez-Platas J, Otero-de-la-Roza A, Ruiz-Fuertes J, Pellicer-Porres J, Oliva R, Popescu C. Polymorphism and Phase Stability of Hydrated Magnesium Carbonate Nesquehonite MgCO 3·3H 2O: Negative Axial Compressibility and Thermal Expansion in a Cementitious Material. CRYSTAL GROWTH & DESIGN 2024; 24:1159-1169. [PMID: 38344675 PMCID: PMC10854074 DOI: 10.1021/acs.cgd.3c01171] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 12/17/2023] [Accepted: 12/18/2023] [Indexed: 03/11/2025]
Abstract
The P-T phase diagram of the hydrated magnesium carbonate nesquehonite (MgCO3·3H2O) has not been reported in the literature. In this paper, we present a joint experimental and computational study of the phase stability and structural behavior of this cementitious material at high-pressure and high-temperature conditions using in situ single-crystal and synchrotron powder X-ray diffraction measurements in resistive-heated diamond anvil cells plus density functional theory calculations. Our results show that nesquehonite undergoes two pressure-induced phase transitions at 2.4 (HP1) and 4.0 GPa (HP2) at ambient temperature. We have found negative axial compressibility and thermal expansivity values, likely related to the directionality of the hydrogen bonds. The equations of state of the different phases have been determined. All the room-temperature compression effects were reversible. Heating experiments at 0.7 GPa show a first temperature-induced decomposition at 115 °C, probably into magnesite and a MgCO3·4H2O phase.
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Affiliation(s)
- David Santamaría-Pérez
- Departamento
de Física Aplicada-ICMUV, MALTA Consolider Team, Universitat de València, Valencia 46100, Spain
| | - Raquel Chuliá-Jordán
- Departamento
de Didáctica de las Ciencias Experimentales y Sociales, Universitat de Valencia, Valencia 46022, Spain
| | - Javier Gonzalez-Platas
- Departamento
Física, Instituto Universitario de Estudios Avanzados en Física
Atómica, Molecular y Fotónica (IUDEA), MALTA Consolider
Team, Universidad de La Laguna, Tenerife 38204, Spain
| | - Alberto Otero-de-la-Roza
- Departamento
de Química Física y Analítica, Facultad de Química,
MALTA Consolider Team, Universidad de Oviedo, Oviedo 33006, Spain
| | - Javier Ruiz-Fuertes
- DCITIMAC,
MALTA Consolider Team, Universidad de Cantabria, Santander 39005, Spain
| | - Julio Pellicer-Porres
- Departamento
de Física Aplicada-ICMUV, MALTA Consolider Team, Universitat de València, Valencia 46100, Spain
| | - Robert Oliva
- GEO3BCN−Geosciences
Barcelona, CSIC, Barcelona 08028, Spain
| | - Catalin Popescu
- CELLS-ALBA
Synchrotron Light Facility, Cerdanyola
del Vallés, Barcelona 08290, Spain
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Reza S, Maaza M, Islam MS. A computational study of the thortveitite structure of zinc pyrovanadate, Zn 2V 2O 7, under pressure. RSC Adv 2023; 13:17212-17221. [PMID: 37304767 PMCID: PMC10248763 DOI: 10.1039/d3ra02426a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 05/25/2023] [Indexed: 06/13/2023] Open
Abstract
We performed a pressure-driven study of zinc pyrovanadate, Zn2V2O7, using the first-principles approach under the framework of density functional theory (DFT). Zn2V2O7 crystalizes in a monoclinic (α-phase) structure with the space group C2/c at ambient pressure. In comparison with the ambient phase, there are four different high-pressure phases, namely β, γ, κ and δ, found at 0.7, 3.8, 4.8 and 5.3 GPa, respectively. The detailed crystallographic analysis as well as their structures is consistent with the theory and experiment reported in the literature. All phases including the ambient phase are mechanically stable, elastically anisotropic and malleable. The compressibility of the studied pyrovanadate is higher than that of the other meta- and pyrovanadates. The energy dispersion of these studied phases reveals that they are indirect band gap semiconductors with wide band gap energies. The band gap energies follow a reduced trend with pressure except the κ-phase. The effective masses for all of these studied phases were computed from their corresponding band structures. The values of energy gaps obtained from the band structures are almost similar to the optical band gap obtained from the optical absorption spectra, as estimated by the Wood-Tauc theory.
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Affiliation(s)
- S Reza
- Department of Physics, University of Rajshahi Rajshahi 6205 Bangladesh
| | - M Maaza
- UNESCO-UNISA Africa Chair in Nanosciences-Nanotechnology, College of Graduate Studies, University of South Africa Muckleneuk Ridge, PO Box 392 Pretoria South Africa
- Nanosciences African Network (NANOAFNET), Materials Research Dept., iThemba LABS-National Research Foundation of South Africa 1 Old Faure Road, Somerset West, PO Box 722 Western Cape 7129 South Africa
| | - M S Islam
- Department of Physics, University of Rajshahi Rajshahi 6205 Bangladesh
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Santamaría-Pérez D, Chuliá-Jordán R, Otero-de-la-Roza A, Ruiz-Fuertes J, Pellicer-Porres J, Popescu C. Structural Behavior of Minrecordite Carbonate Mineral upon Compression: Effect of Mg → Zn Chemical Substitution in Dolomite-Type Compounds. ACS OMEGA 2023; 8:10403-10410. [PMID: 36969435 PMCID: PMC10034829 DOI: 10.1021/acsomega.2c08215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 01/12/2023] [Indexed: 06/18/2023]
Abstract
We report the structural behavior and compressibility of minrecordite, a naturally occurring Zn-rich dolomite mineral, determined using diamond-anvil cell synchrotron X-ray diffraction. Our data show that this rhombohedral CaZn0.52Mg0.48(CO3)2 carbonate exhibits a highly anisotropic behavior, the c axis being 3.3 times more compressible than the a axis. The axial compressibilities and the equation of state are governed by the compression of the [CaO6] and [ZnO6] octahedra, which are the cations in larger proportion in each layer. We observe the existence of a dense polymorph above 13.4(3) GPa using Ne as a pressure-transmitting medium, but the onset pressure of the phase transition decreases with the appearance of deviatoric stresses in nonhydrostatic conditions. Our results suggest that the phase transition observed in minrecordite is strain-induced and that the high-pressure polymorph is intimately related to the CaCO3-II-type structure. A comparison with other dolomite minerals indicates that the transition pressure decreases when the ratio Zn/Mg in the crystal lattice of pure dolomite is larger than 1. Density functional theory (DFT) calculations predict that a distorted CaCO3-II-type structure is energetically more stable than dolomite-type CaZn(CO3)2 above 10 GPa. However, according to our calculations, the most stable structure above this pressure is a dolomite-V-type phase, a polymorph not observed experimentally.
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Affiliation(s)
- David Santamaría-Pérez
- MALTA
Consolider Team, Departamento de Física Aplicada-ICMUV, Universitat de
València, 46100 Valencia, Spain
| | - Raquel Chuliá-Jordán
- MALTA
Consolider Team, Departamento de Física Aplicada-ICMUV, Universitat de
València, 46100 Valencia, Spain
- Departamento
de Didáctica de las Ciencias Experimentales y Sociales, Universitat de Valencia, 46022 Valencia, Spain
| | - Alberto Otero-de-la-Roza
- MALTA
Consolider Team, Departamento de Química Física y Analítica,
Facultad de Química, Universidad
de Oviedo, 33006 Oviedo, Spain
| | - Javier Ruiz-Fuertes
- MALTA
Consolider Team, DCITIMAC, Universidad de
Cantabria, 39005 Santander, Spain
| | - Julio Pellicer-Porres
- MALTA
Consolider Team, Departamento de Física Aplicada-ICMUV, Universitat de
València, 46100 Valencia, Spain
| | - Catalin Popescu
- CELLS-ALBA
Synchrotron Light Facility, Cerdanyola del Vallès, 08290 Barcelona, Spain
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6
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Phase stability and dense polymorph of the BaCa(CO 3) 2 barytocalcite carbonate. Sci Rep 2022; 12:7413. [PMID: 35523844 PMCID: PMC9076881 DOI: 10.1038/s41598-022-11301-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 04/15/2022] [Indexed: 11/12/2022] Open
Abstract
The double carbonate BaCa(CO3)2 holds potential as host compound for carbon in the Earth’s crust and mantle. Here, we report the crystal structure determination of a high-pressure BaCa(CO3)2 phase characterized by single-crystal X-ray diffraction. This phase, named post-barytocalcite, was obtained at 5.7 GPa and can be described by a monoclinic Pm space group. The barytocalcite to post-baritocalcite phase transition involves a significant discontinuous 1.4% decrease of the unit-cell volume, and the increase of the coordination number of 1/4 and 1/2 of the Ba and Ca atoms, respectively. High-pressure powder X-ray diffraction measurements at room- and high-temperatures using synchrotron radiation and DFT calculations yield the thermal expansion of barytocalcite and, together with single-crystal data, the compressibility and anisotropy of both the low- and high-pressure phases. The calculated enthalpy differences between different BaCa(CO3)2 polymorphs confirm that barytocalcite is the thermodynamically stable phase at ambient conditions and that it undergoes the phase transition to the experimentally observed post-barytocalcite phase. The double carbonate is significantly less stable than a mixture of the CaCO3 and BaCO3 end-members above 10 GPa. The experimental observation of the high-pressure phase up to 15 GPa and 300 ºC suggests that the decomposition into its single carbonate components is kinetically hindered.
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Chuliá-Jordán R, Juarez-Perez EJ. Short Photoluminescence Lifetimes Linked to Crystallite Dimensions, Connectivity, and Perovskite Crystal Phases. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2022; 126:3466-3474. [PMID: 35242269 PMCID: PMC8883521 DOI: 10.1021/acs.jpcc.1c08867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 01/31/2022] [Indexed: 06/14/2023]
Abstract
Time-correlated single photon counting has been conducted to gain further insights into the short photoluminescence lifetimes (nanosecond) of lead iodide perovskite (MAPbI3) thin films (∼100 nm). We analyze three different morphologies, compact layer, isolated island, and connected large grain films, from 14 to 300 K using a laser excitation power of 370 nJ/cm2. Lifetime fittings from the Generalized Berberan-Santos decay model range from 0.5 to 6.5 ns, pointing to quasi-direct bandgap emission despite the three different sample strains. The high energy band emission for the isolated-island morphology shows fast recombination rate centers up to 4.8 ns-1, compared to the less than 2 ns-1 for the other two morphologies, similar to that expected in a good quality single crystal of MAPbI3. Low-temperature measurements on samples reflect a huge oscillator strength in this material where the free exciton recombination dominates, explaining the fast lifetimes, the low thermal excitation, and the thermal escape obtained.
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Affiliation(s)
- Raquel Chuliá-Jordán
- Instituto
de Ciencia de los Materiales, Universitat
de València, C/Catedrático J. Beltrán, 2, Paterna 46980, Spain
| | - Emilio J. Juarez-Perez
- ARAID
Foundation, Instituto de Nanociencia y Materiales de Aragón
(INMA), CSIC - Universidad de Zaragoza, Zaragoza 50009, Spain
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Abstract
The structure of the naturally occurring, iron-rich mineral Ca1.08(6)Mg0.24(2)Fe0.64(4)Mn0.04(1)(CO3)2 ankerite was studied in a joint experimental and computational study. Synchrotron X-ray powder diffraction measurements up to 20 GPa were complemented by density functional theory calculations. The rhombohedral ankerite structure is stable under compression up to 12 GPa. A third-order Birch–Murnaghan equation of state yields V0 = 328.2(3) Å3, bulk modulus B0 = 89(4) GPa, and its first-pressure derivative B’0 = 5.3(8)—values which are in good agreement with those obtained in our calculations for an ideal CaFe(CO3)2 ankerite composition. At 12 GPa, the iron-rich ankerite structure undergoes a reversible phase transition that could be a consequence of increasingly non-hydrostatic conditions above 10 GPa. The high-pressure phase could not be characterized. DFT calculations were used to explore the relative stability of several potential high-pressure phases (dolomite-II-, dolomite-III- and dolomite-V-type structures), and suggest that the dolomite-V phase is the thermodynamically stable phase above 5 GPa. A novel high-pressure polymorph more stable than the dolomite-III-type phase for ideal CaFe(CO3)2 ankerite was also proposed. This high-pressure phase consists of Fe and Ca atoms in sevenfold and ninefold coordination, respectively, while carbonate groups remain in a trigonal planar configuration. This phase could be a candidate structure for dense carbonates in other compositional systems.
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Chuliá-Jordán R, Santamaria-Perez D, Ruiz-Fuertes J, Otero-de-la-Roza A, Popescu C. Crystal Structure of BaCa(CO 3) 2 Alstonite Carbonate and Its Phase Stability upon Compression. ACS EARTH & SPACE CHEMISTRY 2021; 5:1130-1139. [PMID: 34901683 PMCID: PMC8656406 DOI: 10.1021/acsearthspacechem.1c00032] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 04/09/2021] [Accepted: 04/09/2021] [Indexed: 06/14/2023]
Abstract
New single-crystal X-ray diffraction experiments and density functional theory (DFT) calculations reveal that the crystal chemistry of the CaO-BaO-CO2 system is more complex than previously thought. We characterized the BaCa(CO3)2 alstonite structure at ambient conditions, which differs from the recently reported crystal structure of this mineral in the stacking of the carbonate groups. This structural change entails the existence of different cation coordination environments. The structural behavior of alstonite at high pressures was studied using synchrotron powder X-ray diffraction data and ab initio calculations up to 19 and 50 GPa, respectively. According to the experiments, above 9 GPa, the alstonite structure distorts into a monoclinic C2 phase derived from the initial trigonal structure. This is consistent with the appearance of imaginary frequencies and geometry relaxation in DFT calculations. Moreover, calculations predict a second phase transition at 24 GPa, which would cause the increase in the coordination number of Ba atoms from 10 to 11 and 12. We determined the equation of state of alstonite (V 0 = 1608(2) Å3, B 0 = 60(3) GPa, B'0 = 4.4(8) from experimental data) and analyzed the evolution of the polyhedral units under compression. The crystal chemistry of alstonite was compared to that of other carbonates and the relative stability of all known BaCa(CO3)2 polymorphs was investigated.
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Affiliation(s)
- Raquel Chuliá-Jordán
- Departamento
de Física Aplicada-ICMUV, Universitat
de València, MALTA Consolider Team, 46100 Valencia, Spain
| | - David Santamaria-Perez
- Departamento
de Física Aplicada-ICMUV, Universitat
de València, MALTA Consolider Team, 46100 Valencia, Spain
| | - Javier Ruiz-Fuertes
- DCITIMAC,
Universidad de Cantabria, MALTA Consolider Team, 39005 Santander, Spain
| | - Alberto Otero-de-la-Roza
- Departamento
de Química Física y Analítica, Facultad de Química, Universidad de Oviedo, MALTA Consolider Team, 33006 Oviedo, Spain
| | - Catalin Popescu
- CELLS-ALBA
Synchrotron Light Facility, Cerdanyola
del Vallès, 08290 Barcelona, Spain
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Oxidation of High Yield Strength Metals Tungsten and Rhenium in High-Pressure High-Temperature Experiments of Carbon Dioxide and Carbonates. CRYSTALS 2019. [DOI: 10.3390/cryst9120676] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The laser-heating diamond-anvil cell technique enables direct investigations of materials under high pressures and temperatures, usually confining the samples with high yield strength W and Re gaskets. This work presents experimental data that evidences the chemical reactivity between these refractory metals and CO2 or carbonates at temperatures above 1300 °Ϲ and pressures above 6 GPa. Metal oxides and diamond are identified as reaction products. Recommendations to minimize non-desired chemical reactions in high-pressure high-temperature experiments are given.
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