High-pressure polymorphism of Fe2P and its implications for meteorites and Earth's core

Przemyslaw Dera, Barbara Lavina, Lauren A. Borkowski, Vitali B. Prakapenka, Stephen R. Sutton, Mark L. Rivers, Robert T Downs, Nabil Z. Boctor, Charles T. Prewitt

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Minerals with composition (Fe,Ni)2P, are rare, though important accessory phases in iron and chondritic meteorites. The occurrence of these minerals in meteorites is believed to originate either from the equilibrium condensation of protoplanetary materials in solar nebulae or from the later accretion and condensation processes in the cores of parent bodies. Fe-Ni phosphides are considered a possible candidate for a minor phase present in the Earth's core, and at least partially responsible for the observed density deficit with respect to pure iron. We report results of high-pressure high-temperature X-ray diffraction experiments with synthetic barringerite (Fe2P) up to 40 GPa and 1400 K. A new phase transition to the C02Si-type structure has been found at 8.0 GPa, upon heating. The high-pressure phase can be metastably quenched to ambient conditions at room temperature, and then, if heated again, transforms back to barringerite, providing an important constraint on the thermodynamic history of meteorite.

Original languageEnglish (US)
Article numberL10301
JournalGeophysical Research Letters
Volume35
Issue number10
DOIs
StatePublished - May 28 2008

Fingerprint

Earth core
polymorphism
meteorites
meteorite
condensation
minerals
iron meteorites
iron
solar nebula
phosphides
accessories
parent body
mineral
phase transition
transform
thermodynamics
X-ray diffraction
accretion
histories
occurrences

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Geophysics

Cite this

Dera, P., Lavina, B., Borkowski, L. A., Prakapenka, V. B., Sutton, S. R., Rivers, M. L., ... Prewitt, C. T. (2008). High-pressure polymorphism of Fe2P and its implications for meteorites and Earth's core. Geophysical Research Letters, 35(10), [L10301]. https://doi.org/10.1029/2008GL033867

High-pressure polymorphism of Fe2P and its implications for meteorites and Earth's core. / Dera, Przemyslaw; Lavina, Barbara; Borkowski, Lauren A.; Prakapenka, Vitali B.; Sutton, Stephen R.; Rivers, Mark L.; Downs, Robert T; Boctor, Nabil Z.; Prewitt, Charles T.

In: Geophysical Research Letters, Vol. 35, No. 10, L10301, 28.05.2008.

Research output: Contribution to journalArticle

Dera, P, Lavina, B, Borkowski, LA, Prakapenka, VB, Sutton, SR, Rivers, ML, Downs, RT, Boctor, NZ & Prewitt, CT 2008, 'High-pressure polymorphism of Fe2P and its implications for meteorites and Earth's core', Geophysical Research Letters, vol. 35, no. 10, L10301. https://doi.org/10.1029/2008GL033867
Dera P, Lavina B, Borkowski LA, Prakapenka VB, Sutton SR, Rivers ML et al. High-pressure polymorphism of Fe2P and its implications for meteorites and Earth's core. Geophysical Research Letters. 2008 May 28;35(10). L10301. https://doi.org/10.1029/2008GL033867
Dera, Przemyslaw ; Lavina, Barbara ; Borkowski, Lauren A. ; Prakapenka, Vitali B. ; Sutton, Stephen R. ; Rivers, Mark L. ; Downs, Robert T ; Boctor, Nabil Z. ; Prewitt, Charles T. / High-pressure polymorphism of Fe2P and its implications for meteorites and Earth's core. In: Geophysical Research Letters. 2008 ; Vol. 35, No. 10.
@article{8625b6b2c86a44ae92ab1fa7c82e854f,
title = "High-pressure polymorphism of Fe2P and its implications for meteorites and Earth's core",
abstract = "Minerals with composition (Fe,Ni)2P, are rare, though important accessory phases in iron and chondritic meteorites. The occurrence of these minerals in meteorites is believed to originate either from the equilibrium condensation of protoplanetary materials in solar nebulae or from the later accretion and condensation processes in the cores of parent bodies. Fe-Ni phosphides are considered a possible candidate for a minor phase present in the Earth's core, and at least partially responsible for the observed density deficit with respect to pure iron. We report results of high-pressure high-temperature X-ray diffraction experiments with synthetic barringerite (Fe2P) up to 40 GPa and 1400 K. A new phase transition to the C02Si-type structure has been found at 8.0 GPa, upon heating. The high-pressure phase can be metastably quenched to ambient conditions at room temperature, and then, if heated again, transforms back to barringerite, providing an important constraint on the thermodynamic history of meteorite.",
author = "Przemyslaw Dera and Barbara Lavina and Borkowski, {Lauren A.} and Prakapenka, {Vitali B.} and Sutton, {Stephen R.} and Rivers, {Mark L.} and Downs, {Robert T} and Boctor, {Nabil Z.} and Prewitt, {Charles T.}",
year = "2008",
month = "5",
day = "28",
doi = "10.1029/2008GL033867",
language = "English (US)",
volume = "35",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "10",

}

TY - JOUR

T1 - High-pressure polymorphism of Fe2P and its implications for meteorites and Earth's core

AU - Dera, Przemyslaw

AU - Lavina, Barbara

AU - Borkowski, Lauren A.

AU - Prakapenka, Vitali B.

AU - Sutton, Stephen R.

AU - Rivers, Mark L.

AU - Downs, Robert T

AU - Boctor, Nabil Z.

AU - Prewitt, Charles T.

PY - 2008/5/28

Y1 - 2008/5/28

N2 - Minerals with composition (Fe,Ni)2P, are rare, though important accessory phases in iron and chondritic meteorites. The occurrence of these minerals in meteorites is believed to originate either from the equilibrium condensation of protoplanetary materials in solar nebulae or from the later accretion and condensation processes in the cores of parent bodies. Fe-Ni phosphides are considered a possible candidate for a minor phase present in the Earth's core, and at least partially responsible for the observed density deficit with respect to pure iron. We report results of high-pressure high-temperature X-ray diffraction experiments with synthetic barringerite (Fe2P) up to 40 GPa and 1400 K. A new phase transition to the C02Si-type structure has been found at 8.0 GPa, upon heating. The high-pressure phase can be metastably quenched to ambient conditions at room temperature, and then, if heated again, transforms back to barringerite, providing an important constraint on the thermodynamic history of meteorite.

AB - Minerals with composition (Fe,Ni)2P, are rare, though important accessory phases in iron and chondritic meteorites. The occurrence of these minerals in meteorites is believed to originate either from the equilibrium condensation of protoplanetary materials in solar nebulae or from the later accretion and condensation processes in the cores of parent bodies. Fe-Ni phosphides are considered a possible candidate for a minor phase present in the Earth's core, and at least partially responsible for the observed density deficit with respect to pure iron. We report results of high-pressure high-temperature X-ray diffraction experiments with synthetic barringerite (Fe2P) up to 40 GPa and 1400 K. A new phase transition to the C02Si-type structure has been found at 8.0 GPa, upon heating. The high-pressure phase can be metastably quenched to ambient conditions at room temperature, and then, if heated again, transforms back to barringerite, providing an important constraint on the thermodynamic history of meteorite.

UR - http://www.scopus.com/inward/record.url?scp=52949087506&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=52949087506&partnerID=8YFLogxK

U2 - 10.1029/2008GL033867

DO - 10.1029/2008GL033867

M3 - Article

AN - SCOPUS:52949087506

VL - 35

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 10

M1 - L10301

ER -