Strength and Elasticity of [Formula presented] across the Stishovite–[Formula presented]-type Structural Phase Boundary

Sean R. Shieh, Thomas S. Duffy, Baosheng Li

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Radial x-ray diffraction experiments were conducted under nonhydrostatic compression on [Formula presented] to 60 GPa in a diamond anvil cell. This ratio of differential stress to shear modulus [Formula presented] is 0.019(3)–0.037(5) at [Formula presented]. The ratio for octahedrally coordinated stishovite is lower by a factor of about 2 than observed in four-coordinated silicates. Using a theoretical model for the shear modulus, the differential stress of stishovite is found to be 4.5(1.5) GPa below 40 GPa and to decrease sharply as the stishovite–[Formula presented]-type phase transition boundary is approached. Inversion of measured lattice strains provides direct experimental evidence for softening of [Formula presented].

Original languageEnglish (US)
JournalPhysical review letters
Volume89
Issue number25
DOIs
StatePublished - Jan 1 2002

Fingerprint

stishovite
elastic properties
shear
anvils
softening
silicates
x ray diffraction
diamonds
inversions
cells

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

@article{7bec3218af934f39a24129260183dcb2,
title = "Strength and Elasticity of [Formula presented] across the Stishovite–[Formula presented]-type Structural Phase Boundary",
abstract = "Radial x-ray diffraction experiments were conducted under nonhydrostatic compression on [Formula presented] to 60 GPa in a diamond anvil cell. This ratio of differential stress to shear modulus [Formula presented] is 0.019(3)–0.037(5) at [Formula presented]. The ratio for octahedrally coordinated stishovite is lower by a factor of about 2 than observed in four-coordinated silicates. Using a theoretical model for the shear modulus, the differential stress of stishovite is found to be 4.5(1.5) GPa below 40 GPa and to decrease sharply as the stishovite–[Formula presented]-type phase transition boundary is approached. Inversion of measured lattice strains provides direct experimental evidence for softening of [Formula presented].",
author = "Shieh, {Sean R.} and Duffy, {Thomas S.} and Baosheng Li",
year = "2002",
month = "1",
day = "1",
doi = "https://doi.org/10.1103/PhysRevLett.89.255507",
language = "English (US)",
volume = "89",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "25",

}

Strength and Elasticity of [Formula presented] across the Stishovite–[Formula presented]-type Structural Phase Boundary. / Shieh, Sean R.; Duffy, Thomas S.; Li, Baosheng.

In: Physical review letters, Vol. 89, No. 25, 01.01.2002.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Strength and Elasticity of [Formula presented] across the Stishovite–[Formula presented]-type Structural Phase Boundary

AU - Shieh, Sean R.

AU - Duffy, Thomas S.

AU - Li, Baosheng

PY - 2002/1/1

Y1 - 2002/1/1

N2 - Radial x-ray diffraction experiments were conducted under nonhydrostatic compression on [Formula presented] to 60 GPa in a diamond anvil cell. This ratio of differential stress to shear modulus [Formula presented] is 0.019(3)–0.037(5) at [Formula presented]. The ratio for octahedrally coordinated stishovite is lower by a factor of about 2 than observed in four-coordinated silicates. Using a theoretical model for the shear modulus, the differential stress of stishovite is found to be 4.5(1.5) GPa below 40 GPa and to decrease sharply as the stishovite–[Formula presented]-type phase transition boundary is approached. Inversion of measured lattice strains provides direct experimental evidence for softening of [Formula presented].

AB - Radial x-ray diffraction experiments were conducted under nonhydrostatic compression on [Formula presented] to 60 GPa in a diamond anvil cell. This ratio of differential stress to shear modulus [Formula presented] is 0.019(3)–0.037(5) at [Formula presented]. The ratio for octahedrally coordinated stishovite is lower by a factor of about 2 than observed in four-coordinated silicates. Using a theoretical model for the shear modulus, the differential stress of stishovite is found to be 4.5(1.5) GPa below 40 GPa and to decrease sharply as the stishovite–[Formula presented]-type phase transition boundary is approached. Inversion of measured lattice strains provides direct experimental evidence for softening of [Formula presented].

UR - http://www.scopus.com/inward/record.url?scp=85038305932&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85038305932&partnerID=8YFLogxK

U2 - https://doi.org/10.1103/PhysRevLett.89.255507

DO - https://doi.org/10.1103/PhysRevLett.89.255507

M3 - Article

VL - 89

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 25

ER -