Elasticity of α-cristobalite: A silicon dioxide with a negative poisson's ratio

Amir Yeganeh-Haeri; Donald J. Weidner; John B. Parise

doi:10.1126/science.257.5070.650

Elasticity of α-cristobalite: A silicon dioxide with a negative poisson's ratio

Amir Yeganeh-Haeri
, Donald J. Weidner
, John B. Parise

Geosciences

Stony Brook University

Research output: Contribution to journal › Article › peer-review

474 Scopus citations

Abstract

Laser Brillouin spectroscopy was used to determine the adiabatic single-crystal elastic stiffness coefficients of silicon dioxide (SiO ₂) in the α-cristobalite structure. This SiO₂ polymorph, unlike other silicas and silicates, exhibits a negative Poisson's ratio; α-cristobalite contracts laterally when compressed and expands laterally when stretched. Tensorial analysis of the elastic coefficients shows that Poisson's ratio reaches a maximum value of -0.5 in some directions, whereas averaged values for the single-phased aggregate yield a Poisson's ratio of -0.16.

Original language	English
Pages (from-to)	650-652
Number of pages	3
Journal	Science
Volume	257
Issue number	5070
DOIs	https://doi.org/10.1126/science.257.5070.650
State	Published - 1992

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title = "Elasticity of α-cristobalite: A silicon dioxide with a negative poisson's ratio",

abstract = "Laser Brillouin spectroscopy was used to determine the adiabatic single-crystal elastic stiffness coefficients of silicon dioxide (SiO 2) in the α-cristobalite structure. This SiO2 polymorph, unlike other silicas and silicates, exhibits a negative Poisson's ratio; α-cristobalite contracts laterally when compressed and expands laterally when stretched. Tensorial analysis of the elastic coefficients shows that Poisson's ratio reaches a maximum value of -0.5 in some directions, whereas averaged values for the single-phased aggregate yield a Poisson's ratio of -0.16.",

author = "Amir Yeganeh-Haeri and Weidner, \{Donald J.\} and Parise, \{John B.\}",

year = "1992",

doi = "10.1126/science.257.5070.650",

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T1 - Elasticity of α-cristobalite

T2 - A silicon dioxide with a negative poisson's ratio

AU - Yeganeh-Haeri, Amir

AU - Weidner, Donald J.

AU - Parise, John B.

PY - 1992

Y1 - 1992

N2 - Laser Brillouin spectroscopy was used to determine the adiabatic single-crystal elastic stiffness coefficients of silicon dioxide (SiO 2) in the α-cristobalite structure. This SiO2 polymorph, unlike other silicas and silicates, exhibits a negative Poisson's ratio; α-cristobalite contracts laterally when compressed and expands laterally when stretched. Tensorial analysis of the elastic coefficients shows that Poisson's ratio reaches a maximum value of -0.5 in some directions, whereas averaged values for the single-phased aggregate yield a Poisson's ratio of -0.16.

AB - Laser Brillouin spectroscopy was used to determine the adiabatic single-crystal elastic stiffness coefficients of silicon dioxide (SiO 2) in the α-cristobalite structure. This SiO2 polymorph, unlike other silicas and silicates, exhibits a negative Poisson's ratio; α-cristobalite contracts laterally when compressed and expands laterally when stretched. Tensorial analysis of the elastic coefficients shows that Poisson's ratio reaches a maximum value of -0.5 in some directions, whereas averaged values for the single-phased aggregate yield a Poisson's ratio of -0.16.

UR - https://www.scopus.com/pages/publications/0003251413

U2 - 10.1126/science.257.5070.650

DO - 10.1126/science.257.5070.650

M3 - Article

AN - SCOPUS:0003251413

SN - 0036-8075

VL - 257

SP - 650

EP - 652

JO - Science

JF - Science

IS - 5070

ER -

Elasticity of α-cristobalite: A silicon dioxide with a negative poisson's ratio

Abstract

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