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Lotti P, Milani S, Merlini M, Joseph B, Alabarse F, Lausi A. Single-crystal diffraction at the high-pressure Indo-Italian beamline Xpress at Elettra, Trieste. JOURNAL OF SYNCHROTRON RADIATION 2020; 27:222-229. [PMID: 31868756 DOI: 10.1107/s1600577519015170] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 11/11/2019] [Indexed: 06/10/2023]
Abstract
In this study the first in situ high-pressure single-crystal X-ray diffraction experiments at Xpress, the Indo-Italian beamline of the Elettra synchrotron, Trieste (Italy), are reported. A description of the beamline experimental setup and of the procedures for single-crystal centring, data collection and processing, using diamond anvil cells, are provided. High-pressure experiments on a synthetic crystal of clinoenstatite (MgSiO3), CaCO3 polymorphs and a natural sample of leucophoenicite [Mn7Si3O12(OH)2] validated the suitability of the beamline experimental setup to: (i) locate and characterize pressure-induced phase transitions; (ii) solve ab initio the crystal structure of high-pressure polymorphs; (iii) perform fine structural analyses at the atomic scale as a function of pressure; (iv) disclose complex symmetry and structural features undetected using conventional X-ray sources.
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Affiliation(s)
- Paolo Lotti
- Dipartimento di Scienze della Terra, Università degli Studi di Milano, Via Botticelli 23, 20133 Milano, Italy
| | - Sula Milani
- Dipartimento di Scienze della Terra, Università degli Studi di Milano, Via Botticelli 23, 20133 Milano, Italy
| | - Marco Merlini
- Dipartimento di Scienze della Terra, Università degli Studi di Milano, Via Botticelli 23, 20133 Milano, Italy
| | - Boby Joseph
- Elettra Sincrotrone Trieste ScPA, Strada Statale 14, km 163.5, Basovizza, 34149 Trieste, Italy
| | - Frederico Alabarse
- Elettra Sincrotrone Trieste ScPA, Strada Statale 14, km 163.5, Basovizza, 34149 Trieste, Italy
| | - Andrea Lausi
- Elettra Sincrotrone Trieste ScPA, Strada Statale 14, km 163.5, Basovizza, 34149 Trieste, Italy
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Addad A, Carrez P, Cordier P, Jacob D, Karato S, Mohiuddin A, Mussi A, Nzogang BC, Roussel P, Tommasi A. Anhydrous Phase B: Transmission Electron Microscope Characterization and Elastic Properties. GEOCHEMISTRY, GEOPHYSICS, GEOSYSTEMS : G(3) 2019; 20:4059-4072. [PMID: 31762710 PMCID: PMC6853247 DOI: 10.1029/2019gc008429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 07/19/2019] [Accepted: 07/19/2019] [Indexed: 06/10/2023]
Abstract
Anhydrous phase B and stishovite formed directly from olivine in experiments at 14 GPa and 1400 °CThe structure of anhydrous phase B is determined ab initio from precession electron diffraction tomography in transmission electron microscopyElastic and seismic properties of anhydrous phase B are calculated.
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Affiliation(s)
- A. Addad
- Université de Lille, CNRS, INRA, ENSCL, UMR 8207 ‐ UMET ‐ Unité Matériaux et TransformationsLilleFrance
| | - P. Carrez
- Université de Lille, CNRS, INRA, ENSCL, UMR 8207 ‐ UMET ‐ Unité Matériaux et TransformationsLilleFrance
| | - P. Cordier
- Université de Lille, CNRS, INRA, ENSCL, UMR 8207 ‐ UMET ‐ Unité Matériaux et TransformationsLilleFrance
| | - D. Jacob
- Université de Lille, CNRS, INRA, ENSCL, UMR 8207 ‐ UMET ‐ Unité Matériaux et TransformationsLilleFrance
| | - S.‐I. Karato
- Department of Geology and GeophysicsYale UniversityNew HavenCTUSA
| | - A. Mohiuddin
- Department of Geology and GeophysicsYale UniversityNew HavenCTUSA
| | - A. Mussi
- Université de Lille, CNRS, INRA, ENSCL, UMR 8207 ‐ UMET ‐ Unité Matériaux et TransformationsLilleFrance
| | - B. C. Nzogang
- Université de Lille, CNRS, INRA, ENSCL, UMR 8207 ‐ UMET ‐ Unité Matériaux et TransformationsLilleFrance
| | - P. Roussel
- Université de Lille, CNRS, Centrale Lille, ENSCL, Université d'Artois, UMR 8181 ‐ UCCS ‐ Unité de Catalyse et de Chimie du SolideLilleFrance
| | - A. Tommasi
- Université de Montpellier, CNRS, Geosciences MontpellierMontpellierFrance
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Brodholt J, Wood B. Simulations of the structure and thermodynamic properties of water at high pressures and temperatures. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/92jb01407] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Zhang J, Herzberg C. Melting experiments on anhydrous peridotite KLB-1 from 5.0 to 22.5 GPa. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/94jb01406] [Citation(s) in RCA: 268] [Impact Index Per Article: 22.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Presnall DC, Walter MJ. Melting of forsterite, Mg2SiO4, from 9.7 to 16.5 GPa. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/93jb01007] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Duffy TS, Ahrens TJ, Lange MA. The shock wave equation of state of brucite Mg(OH)2. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/91jb00987] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Nolet G, Zielhuis A. Low S velocities under the Tornquist-Teisseyre zone: Evidence for water injection into the transition zone by subduction. ACTA ACUST UNITED AC 1994. [DOI: 10.1029/94jb00083] [Citation(s) in RCA: 121] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Abstract
The volume of Earth's oceans may be determined by a dynamic mechanism involving exchange of water between the crust and the mantle. Fast-spreading mid-ocean ridges are currently submerged to a depth at which the pressure is close to the critical pressure for seawater. This ensures optimal convective heat transport and, hence, maximal penetration of hydrothermal circulation along the ridge axes. The oceanic crust is hydrated to a depth of a kilometer or more and can therefore carry a substantial flux of water to the upper mantle when it is subducted. The current ingassing rate of water by this process is probably at least sufficient to balance the outgassing rate. If the oceans were shallower, as they may have been in the distant past, convective heat transport would be reduced and the depth of hydrothermal penetration and crustal hydration would decrease. Outgassing would exceed ingassing and ocean volume would increase. The system is self-stabilizing as long as the depth of the oceans does not exceed its present value. This mechanism could explain why continental freeboard has remained approximately constant since the Archean despite probable increases in continental area.
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Affiliation(s)
- J F Kasting
- Department of Geosciences, The Pennsylvania State University, University Park 16802, USA
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Abstract
Most minerals of Earth's upper mantle contain small amounts of hydrogen, structurally bound as hydroxyl (OH). The OH concentration in each mineral species is variable, in some cases reflecting the geological environment of mineral formation. Of the major mantle minerals, pyroxenes are the most hydrous, typically containing approximately 200 to 500 parts per million H(2)O by weight, and probably dominate the water budget and hydrogen geochemistry of mantle rocks that do not contain a hydrous phase. Garnets and olivines commonly contain approximately 1 to 50 parts per million. Nominally anhydrous minerals constitute a significant reservoir for mantle hydrogen, possibly accommodating all water in the depleted mantle and providing a possible mechanism to recycle water from Earth's surface into the deep mantle.
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Williams DR, Pan V. Internally heated mantle convection and the thermal and degassing history of the Earth. ACTA ACUST UNITED AC 1992. [DOI: 10.1029/92jb00034] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Tyburczy JA, Duffy TS, Ahrens TJ, Lange MA. Shock wave equation of state of serpentine to 150 GPa: Implications for the occurrence of water in the Earth's lower mantle. ACTA ACUST UNITED AC 1991. [DOI: 10.1029/91jb01573] [Citation(s) in RCA: 46] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Herzberg C, Gasparik T, Sawamoto H. Origin of mantle peridotite: Constraints from melting experiments to 16.5 GPa. ACTA ACUST UNITED AC 1990. [DOI: 10.1029/jb095ib10p15779] [Citation(s) in RCA: 85] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Presnall DC, Gasparik T. Melting of enstatite (MgSiO3) from 10 to 16.5 GPa and the forsterite (Mg2SiO4)-majorite (MgSiO3) eutectic at 16.5 GPa: Implications for the origin of the mantle. ACTA ACUST UNITED AC 1990. [DOI: 10.1029/jb095ib10p15771] [Citation(s) in RCA: 81] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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