Unit cell determination of coexisting post-perovskite and H-phase in (Mg,Fe)SiO3 using multigrain XRD: compositional variation across a laser heating spot at 119 GPa
Abstract
Multigrain X-ray diffraction (XRD) can be used to accurately calculate the unit cell parameters of individual mineral phases in a mineral assemblage contained in a diamond anvil cell (DAC). Coexisting post-perovskite (ppv) and H-phase were synthesized at 119 GPa and 2500 K from (Mg0.85Fe0.15)SiO3 in a laser-heated DAC. The unit cell parameters of the ppv and coexisting H-phase were determined using multigrain XRD with a 5 μm spatial resolution, close to the size of the X-ray beam, to understand compositional variations across the center area (20–30 μm) in a laser-heated sample. The ppv phase was Fe-depleted and the unit cell volume of ppv decreased by only 0.16 % (corresponding to ~3 % variation of FeSiO3) from the heating center to 10 μm off the center, while the sample pressure remained at 119 GPa in a Ne quasi-hydrostatic environment. The unit cell volume of the H-phase decreased by 0.54 % (~10 % variation of FeSiO3 content) over the same 10 μm distance. Both phases were more Fe-enriched in the slightly hotter center. This observation suggests that thermal diffusion may not be the major driver for the compositional variations of ppv and H-phase in the center portion of a laser-heated sample. Instead,more »
- Authors:
-
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China)
- Carnegie Inst. of Washington, Argonne, IL (United States). Geophysical Lab., High Pressure Collaborative Access Team (HPCAT)
- Center for High Pressure Science and Technology Advanced Research (HPSTAR), Shanghai (China); Carnegie Inst. of Washington, Washington, DC (United States). Geophysical Lab.
- Publication Date:
- Research Org.:
- Carnegie Inst. of Washington, Washington, DC (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- OSTI Identifier:
- 1466599
- Grant/Contract Number:
- NA0001974; AC02-06CH11357; FG02-94ER14466; FG02-99ER45775
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Progress in Earth and Planetary Science
- Additional Journal Information:
- Journal Volume: 3; Journal Issue: 1; Journal ID: ISSN 2197-4284
- Publisher:
- Springer Open
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; Lower mantle; Multigrain XRD; Diamond anvil cell; Post-perovskite; H-phase; Unit cell; Synchrotron X-ray
Citation Formats
Zhang, Li, Meng, Yue, and Mao, Ho-kwang. Unit cell determination of coexisting post-perovskite and H-phase in (Mg,Fe)SiO3 using multigrain XRD: compositional variation across a laser heating spot at 119 GPa. United States: N. p., 2016.
Web. doi:10.1186/s40645-016-0091-8.
Zhang, Li, Meng, Yue, & Mao, Ho-kwang. Unit cell determination of coexisting post-perovskite and H-phase in (Mg,Fe)SiO3 using multigrain XRD: compositional variation across a laser heating spot at 119 GPa. United States. https://doi.org/10.1186/s40645-016-0091-8
Zhang, Li, Meng, Yue, and Mao, Ho-kwang. Thu .
"Unit cell determination of coexisting post-perovskite and H-phase in (Mg,Fe)SiO3 using multigrain XRD: compositional variation across a laser heating spot at 119 GPa". United States. https://doi.org/10.1186/s40645-016-0091-8. https://www.osti.gov/servlets/purl/1466599.
@article{osti_1466599,
title = {Unit cell determination of coexisting post-perovskite and H-phase in (Mg,Fe)SiO3 using multigrain XRD: compositional variation across a laser heating spot at 119 GPa},
author = {Zhang, Li and Meng, Yue and Mao, Ho-kwang},
abstractNote = {Multigrain X-ray diffraction (XRD) can be used to accurately calculate the unit cell parameters of individual mineral phases in a mineral assemblage contained in a diamond anvil cell (DAC). Coexisting post-perovskite (ppv) and H-phase were synthesized at 119 GPa and 2500 K from (Mg0.85Fe0.15)SiO3 in a laser-heated DAC. The unit cell parameters of the ppv and coexisting H-phase were determined using multigrain XRD with a 5 μm spatial resolution, close to the size of the X-ray beam, to understand compositional variations across the center area (20–30 μm) in a laser-heated sample. The ppv phase was Fe-depleted and the unit cell volume of ppv decreased by only 0.16 % (corresponding to ~3 % variation of FeSiO3) from the heating center to 10 μm off the center, while the sample pressure remained at 119 GPa in a Ne quasi-hydrostatic environment. The unit cell volume of the H-phase decreased by 0.54 % (~10 % variation of FeSiO3 content) over the same 10 μm distance. Both phases were more Fe-enriched in the slightly hotter center. This observation suggests that thermal diffusion may not be the major driver for the compositional variations of ppv and H-phase in the center portion of a laser-heated sample. Instead, these variations could be caused by a temperature effect on the partitioning between the ppv and H-phase over the small gradient.},
doi = {10.1186/s40645-016-0091-8},
journal = {Progress in Earth and Planetary Science},
number = 1,
volume = 3,
place = {United States},
year = {Thu May 12 00:00:00 EDT 2016},
month = {Thu May 12 00:00:00 EDT 2016}
}
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Works referenced in this record:
Unit cell refinement from powder diffraction data: the use of regression diagnostics
journal, February 1997
- Holland, T. J. B.; Redfern, S. A. T.
- Mineralogical Magazine, Vol. 61, Issue 404
Effect of pressure and composition on lattice parameters and unit-cell volume of (Fe,Mg)SiO3 post-perovskite
journal, February 2012
- Zhang, Li; Meng, Yue; Mao, Wendy L.
- Earth and Planetary Science Letters, Vol. 317-318
Synchrotron radiation and laser heating in a diamond anvil cell
journal, January 2001
- Andrault, Denis; Fiquet, Guillaume
- Review of Scientific Instruments, Vol. 72, Issue 2
Phase transition in MgSiO3 perovskite in the earth's lower mantle
journal, August 2004
- Tsuchiya, Taku; Tsuchiya, Jun; Umemoto, Koichiro
- Earth and Planetary Science Letters, Vol. 224, Issue 3-4
Single-crystal structure determination of (Mg,Fe)SiO3 postperovskite
journal, April 2013
- Zhang, L.; Meng, Y.; Dera, P.
- Proceedings of the National Academy of Sciences, Vol. 110, Issue 16
Equations of state of six metals above
journal, September 2004
- Dewaele, Agnès; Loubeyre, Paul; Mezouar, Mohamed
- Physical Review B, Vol. 70, Issue 9
Application of FIB system to ultra-high-pressure Earth science
journal, January 2008
- Miyahara, Masaaki; Sakai, Takeshi; Ohtani, Eiji
- Journal of Mineralogical and Petrological Sciences, Vol. 103, Issue 2
High resolution three-dimensional X-ray diffraction study of dislocations in grains of MgGeO 3 post-perovskite at 90 GPa : DISLOCATIONS IN GRAINS OF MgGeO
journal, March 2012
- Nisr, Carole; Ribárik, Gábor; Ungár, Tamás
- Journal of Geophysical Research: Solid Earth, Vol. 117, Issue B3
Disproportionation of (Mg,Fe)SiO3 perovskite in Earth's deep lower mantle
journal, May 2014
- Zhang, L.; Meng, Y.; Yang, W.
- Science, Vol. 344, Issue 6186
Effects of Fe-enrichment on the equation of state and stability of (Mg,Fe)SiO3 perovskite
journal, January 2013
- Dorfman, Susannah M.; Meng, Yue; Prakapenka, Vitali B.
- Earth and Planetary Science Letters, Vol. 361
Multigrain crystallography
journal, January 2012
- Sørensen, Henning O.; Schmidt, Søren; Wright, Jonathan P.
- Zeitschrift für Kristallographie, Vol. 227, Issue 1
Toward an internally consistent pressure scale
journal, May 2007
- Fei, Y.; Ricolleau, A.; Frank, M.
- Proceedings of the National Academy of Sciences, Vol. 104, Issue 22
Effect of Fe on the equation of state of mantle silicate perovskite over 1Mbar
journal, May 2008
- Lundin, S.; Catalli, K.; Santillán, J.
- Physics of the Earth and Planetary Interiors, Vol. 168, Issue 1-2
New developments in laser-heated diamond anvil cell with in situ synchrotron x-ray diffraction at High Pressure Collaborative Access Team
journal, July 2015
- Meng, Yue; Hrubiak, Rostislav; Rod, Eric
- Review of Scientific Instruments, Vol. 86, Issue 7