SiO2 Glass Density to Lower-Mantle Pressures

Research output: Contribution to journalJournal article – Annual report year: 2017Researchpeer-review

Standard

SiO2 Glass Density to Lower-Mantle Pressures. / Petitgirard, Sylvain; Malfait, Wim J.; Journaux, Baptiste; Collings, Ines E.; Jennings, Eleanor S.; Blanchard, Ingrid; Kantor, Innokenty; Kurnosov, Alexander; Cotte, Marine; Dane, Thomas; Burghammer, Manfred; Rubie, David C.

In: Physical Review Letters, Vol. 119, No. 21, 215701, 2017.

Research output: Contribution to journalJournal article – Annual report year: 2017Researchpeer-review

Harvard

Petitgirard, S, Malfait, WJ, Journaux, B, Collings, IE, Jennings, ES, Blanchard, I, Kantor, I, Kurnosov, A, Cotte, M, Dane, T, Burghammer, M & Rubie, DC 2017, 'SiO2 Glass Density to Lower-Mantle Pressures', Physical Review Letters, vol. 119, no. 21, 215701. https://doi.org/10.1103/PhysRevLett.119.215701

APA

Petitgirard, S., Malfait, W. J., Journaux, B., Collings, I. E., Jennings, E. S., Blanchard, I., ... Rubie, D. C. (2017). SiO2 Glass Density to Lower-Mantle Pressures. Physical Review Letters, 119(21), [215701]. https://doi.org/10.1103/PhysRevLett.119.215701

CBE

Petitgirard S, Malfait WJ, Journaux B, Collings IE, Jennings ES, Blanchard I, Kantor I, Kurnosov A, Cotte M, Dane T, Burghammer M, Rubie DC. 2017. SiO2 Glass Density to Lower-Mantle Pressures. Physical Review Letters. 119(21). https://doi.org/10.1103/PhysRevLett.119.215701

MLA

Vancouver

Petitgirard S, Malfait WJ, Journaux B, Collings IE, Jennings ES, Blanchard I et al. SiO2 Glass Density to Lower-Mantle Pressures. Physical Review Letters. 2017;119(21). 215701. https://doi.org/10.1103/PhysRevLett.119.215701

Author

Petitgirard, Sylvain ; Malfait, Wim J. ; Journaux, Baptiste ; Collings, Ines E. ; Jennings, Eleanor S. ; Blanchard, Ingrid ; Kantor, Innokenty ; Kurnosov, Alexander ; Cotte, Marine ; Dane, Thomas ; Burghammer, Manfred ; Rubie, David C. / SiO2 Glass Density to Lower-Mantle Pressures. In: Physical Review Letters. 2017 ; Vol. 119, No. 21.

Bibtex

@article{3133b1dc3a034d06842fcac530a6a8b5,
title = "SiO2 Glass Density to Lower-Mantle Pressures",
abstract = "The convection or settling of matter in the deep Earth's interior is mostly constrained by density variations between the different reservoirs. Knowledge of the density contrast between solid and molten silicates is thus of prime importance to understand and model the dynamic behavior of the past and present Earth. SiO2 is the main constituent of Earth's mantle and is the reference model system for the behavior of silicate melts at high pressure. Here, we apply our recently developed x-ray absorption technique to the density of SiO2 glass up to 110 GPa, doubling the pressure range for such measurements. Our density data validate recent molecular dynamics simulations and are in good agreement with previous experimental studies conducted at lower pressure. Silica glass rapidly densifies up to 40 GPa, but the density trend then flattens to become asymptotic to the density of SiO2 minerals above 60 GPa. The density data present two discontinuities at similar to 17 and similar to 60 GPa that can be related to a silicon coordination increase from 4 to a mixed 5/6 coordination and from 5/6 to sixfold, respectively. SiO2 glass becomes denser than MgSiO3 glass at similar to 40 GPa, and its density becomes identical to that of MgSiO3 glass above 80 GPa. Our results on SiO2 glass may suggest that a variation of SiO2 content in a basaltic or pyrolitic melt with pressure has at most a minor effect on the final melt density, and iron partitioning between the melts and residual solids is the predominant factor that controls melt buoyancy in the lowermost mantle.",
author = "Sylvain Petitgirard and Malfait, {Wim J.} and Baptiste Journaux and Collings, {Ines E.} and Jennings, {Eleanor S.} and Ingrid Blanchard and Innokenty Kantor and Alexander Kurnosov and Marine Cotte and Thomas Dane and Manfred Burghammer and Rubie, {David C.}",
note = "{\circledC} 2017 American Physical Society",
year = "2017",
doi = "10.1103/PhysRevLett.119.215701",
language = "English",
volume = "119",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "21",

}

RIS

TY - JOUR

T1 - SiO2 Glass Density to Lower-Mantle Pressures

AU - Petitgirard, Sylvain

AU - Malfait, Wim J.

AU - Journaux, Baptiste

AU - Collings, Ines E.

AU - Jennings, Eleanor S.

AU - Blanchard, Ingrid

AU - Kantor, Innokenty

AU - Kurnosov, Alexander

AU - Cotte, Marine

AU - Dane, Thomas

AU - Burghammer, Manfred

AU - Rubie, David C.

N1 - © 2017 American Physical Society

PY - 2017

Y1 - 2017

N2 - The convection or settling of matter in the deep Earth's interior is mostly constrained by density variations between the different reservoirs. Knowledge of the density contrast between solid and molten silicates is thus of prime importance to understand and model the dynamic behavior of the past and present Earth. SiO2 is the main constituent of Earth's mantle and is the reference model system for the behavior of silicate melts at high pressure. Here, we apply our recently developed x-ray absorption technique to the density of SiO2 glass up to 110 GPa, doubling the pressure range for such measurements. Our density data validate recent molecular dynamics simulations and are in good agreement with previous experimental studies conducted at lower pressure. Silica glass rapidly densifies up to 40 GPa, but the density trend then flattens to become asymptotic to the density of SiO2 minerals above 60 GPa. The density data present two discontinuities at similar to 17 and similar to 60 GPa that can be related to a silicon coordination increase from 4 to a mixed 5/6 coordination and from 5/6 to sixfold, respectively. SiO2 glass becomes denser than MgSiO3 glass at similar to 40 GPa, and its density becomes identical to that of MgSiO3 glass above 80 GPa. Our results on SiO2 glass may suggest that a variation of SiO2 content in a basaltic or pyrolitic melt with pressure has at most a minor effect on the final melt density, and iron partitioning between the melts and residual solids is the predominant factor that controls melt buoyancy in the lowermost mantle.

AB - The convection or settling of matter in the deep Earth's interior is mostly constrained by density variations between the different reservoirs. Knowledge of the density contrast between solid and molten silicates is thus of prime importance to understand and model the dynamic behavior of the past and present Earth. SiO2 is the main constituent of Earth's mantle and is the reference model system for the behavior of silicate melts at high pressure. Here, we apply our recently developed x-ray absorption technique to the density of SiO2 glass up to 110 GPa, doubling the pressure range for such measurements. Our density data validate recent molecular dynamics simulations and are in good agreement with previous experimental studies conducted at lower pressure. Silica glass rapidly densifies up to 40 GPa, but the density trend then flattens to become asymptotic to the density of SiO2 minerals above 60 GPa. The density data present two discontinuities at similar to 17 and similar to 60 GPa that can be related to a silicon coordination increase from 4 to a mixed 5/6 coordination and from 5/6 to sixfold, respectively. SiO2 glass becomes denser than MgSiO3 glass at similar to 40 GPa, and its density becomes identical to that of MgSiO3 glass above 80 GPa. Our results on SiO2 glass may suggest that a variation of SiO2 content in a basaltic or pyrolitic melt with pressure has at most a minor effect on the final melt density, and iron partitioning between the melts and residual solids is the predominant factor that controls melt buoyancy in the lowermost mantle.

U2 - 10.1103/PhysRevLett.119.215701

DO - 10.1103/PhysRevLett.119.215701

M3 - Journal article

VL - 119

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 21

M1 - 215701

ER -