DOI: 10.1126/science.251.4992.410. Phase Transition and Thermal Expansion of MgSiO <sub>3</sub> Perovskite

Phase Transition and Thermal Expansion of MgSiO 3 Perovskite

10.1126/science.251.4992.410

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

Results from in situ x-ray diffraction experiments with a DIA-type cubic anvil apparatus (SAM 85) reveal that MgSiO 3 perovskite transforms from the orthorhombic Pbnm symmetry to another perovskite-type structure above 600 kelvin (K) at pressures of 7.3 gigapascals; the apparent volume increase across the transition is 0.7%. Unit-cell volume increased linearly with temperature, both below (1.44 × 10 -5 K -1 ) and above (1.55 × 10 -5 K -1 ) the transition. These results indicate that the physical properties measured on the Pbnm phase should be used with great caution because they may not be applicable to the earth's lower mantle. A density analysis based on the new data yields an iron content of 10.4 weight percent for a pyrolite composition under conditions corresponding to the lower mantle. All current equation-of-state data are compatible with constant chemical composition in the upper and lower mantle; thus, these data imply that a chemically layered mantle is unnecessary, and whole-mantle convection is possible.

Bibliography

Wang, Y., Weidner, D. J., Liebermann, R. C., Liu, X., Ko, J., Vaughan, M. T., Zhao, Y., Yeganeh-Haeri, A., & Pacalo, R. E. G. (1991). Phase Transition and Thermal Expansion of MgSiO 3 Perovskite. Science, 251(4992), 410â413.

Authors 9

Yanbin Wang (first)
Donald J. Weidner (additional)
Robert C. Liebermann (additional)
Xing Liu (additional)
Jaidong Ko (additional)
Michael T. Vaughan (additional)
Yusheng Zhao (additional)
Amir Yeganeh-Haeri (additional)
Rosemary E. G. Pacalo (additional)

References 28 Referenced 77

ALEKSANDROV, K.S., SEQUENCES OF STRUCTURAL PHASE-TRANSITIONS IN PEROVSKITES, FERROELECTRICS 14: 801 (1976). (10.1080/00150197608237799) / FERROELECTRICS (1976)
BROWN, J.M., THERMODYNAMIC PARAMETERS IN THE EARTH AS DETERMINED FROM SEISMIC PROFILES, GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY 66: 579 (1981). (10.1111/j.1365-246X.1981.tb04891.x) / GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY (1981)
BUKOWINSKI, M. S. T., JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS 95: 12583 (1990). (10.1029/JB095iB08p12583) / JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH AND PLANETS (1990)
CHOPELAS, A, THERMAL-EXPANSION MEASUREMENTS AT VERY HIGH-PRESSURE, SYSTEMATICS, AND A CASE FOR A CHEMICALLY HOMOGENEOUS MANTLE, GEOPHYSICAL RESEARCH LETTERS 16: 1347 (1989). (10.1029/GL016i011p01347) / GEOPHYSICAL RESEARCH LETTERS (1989)
DECKER, D.L., HIGH-PRESSURE EQUATION OF STATE FOR NACL, KCL, AND CSCL, JOURNAL OF APPLIED PHYSICS 42: 3239 (1971). (10.1063/1.1660714) / JOURNAL OF APPLIED PHYSICS (1971)
DZIEWONSKI, A.M., PRELIMINARY REFERENCE EARTH MODEL, PHYSICS OF THE EARTH AND PLANETARY INTERIORS 25: 297 (1981). (10.1016/0031-9201(81)90046-7) / PHYSICS OF THE EARTH AND PLANETARY INTERIORS (1981)
GLAZER, A.M., CLASSIFICATION OF TILTED OCTAHEDRA IN PEROVSKITES, ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE 28: 3384 (1972). (10.1107/S0567740872007976) / ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE (1972)
Goodenough, J. B., Landolt-Bornstein, Zahlenwerte utnd Funktionen ales Natturwissenschaften und Technik, Neue Serie, Group II 4: 126 (1970). / Landolt-Bornstein, Zahlenwerte utnd Funktionen ales Natturwissenschaften und Technik, Neue Serie, Group II (1970)
HORIUCHI, H, PEROVSKITE-TYPE MGSIO3 - SINGLE-CRYSTAL X-RAY-DIFFRACTION STUDY, AMERICAN MINERALOGIST 72: 357 (1987). / AMERICAN MINERALOGIST (1987)
ITO, E, EARTH AND PLANETARY SCIENCE LETTERS 38: 443 (1978). (10.1016/0012-821X(78)90119-X) / EARTH AND PLANETARY SCIENCE LETTERS (1978)
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JACKSON, I, SOME GEOPHYSICAL CONSTRAINTS ON THE CHEMICAL-COMPOSITION OF THE EARTHS LOWER MANTLE, EARTH AND PLANETARY SCIENCE LETTERS 62: 91 (1983). (10.1016/0012-821X(83)90073-0) / EARTH AND PLANETARY SCIENCE LETTERS (1983)
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JEANLOZ, R, DENSITY AND COMPOSITION OF THE LOWER MANTLE, PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES 328: 377 (1989). / PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES (1989)
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ROSS, N.L., SINGLE-CRYSTAL X-RAY-DIFFRACTION STUDY OF MGSIO3 PEROVSKITE FROM 77-K TO 400-K, PHYSICS AND CHEMISTRY OF MINERALS 16: 415 (1989). / PHYSICS AND CHEMISTRY OF MINERALS (1989)
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10.1126/science.243.4892.787

Dates

Type	When
Created	18 years, 10 months ago (Oct. 5, 2006, 6:10 p.m.)
Deposited	1 year, 7 months ago (Jan. 12, 2024, 10:41 a.m.)
Indexed	1 year ago (Aug. 8, 2024, 11:15 a.m.)
Issued	34 years, 7 months ago (Jan. 25, 1991)
Published	34 years, 7 months ago (Jan. 25, 1991)
Published Print	34 years, 7 months ago (Jan. 25, 1991)

Funders 0

None

BibTeX

@article{Wang_1991, title={Phase Transition and Thermal Expansion of MgSiO 3 Perovskite}, volume={251}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.251.4992.410}, DOI={10.1126/science.251.4992.410}, number={4992}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Wang, Yanbin and Weidner, Donald J. and Liebermann, Robert C. and Liu, Xing and Ko, Jaidong and Vaughan, Michael T. and Zhao, Yusheng and Yeganeh-Haeri, Amir and Pacalo, Rosemary E. G.}, year={1991}, month=jan, pages={410–413} }

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