DOI: 10.1073/pnas.240466697. Elasticity of MgO and a primary pressure scale to 55 GPa

Elasticity of MgO and a primary pressure scale to 55 GPa

10.1073/pnas.240466697

Crossref journal-article

Proceedings of the National Academy of Sciences

Proceedings of the National Academy of Sciences (341)

Abstract

We have studied the elasticity and pressure–density equation of state of MgO in diamond cells to 55 GPa and have doubled the previous pressure limit of accurate elasticity determinations for crystals. Integrating single-crystal velocity data from Brillouin scattering measurements and density data from polycrystalline x-ray diffraction, we obtained the three principal elastic tensor elements ( C 11 , C 12 , and C 44 ) and various secondary elasticity parameters, including single-crystal elastic anisotropy, Cauchy relation, aggregate sound velocities, and Poisson's ratio, as functions of pressure. The present study also provides a direct determination of pressure without recourse to any prior pressure standard, thus creating a primary pressure scale. The commonly used ruby fluorescence pressure scale has thus been improved to 1% accuracy by the new MgO scale.

Bibliography

Zha, C.-S., Mao, H., & Hemley, R. J. (2000). Elasticity of MgO and a primary pressure scale to 55 GPa. Proceedings of the National Academy of Sciences, 97(25), 13494â13499.

Authors 3

Chang-Sheng Zha (first)
Ho-kwang Mao (additional)
Russell J. Hemley (additional)

References 43 Referenced 408

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Dates

Type	When
Created	23 years, 1 month ago (July 26, 2002, 10:44 a.m.)
Deposited	3 years, 4 months ago (April 13, 2022, 9:29 a.m.)
Indexed	40 minutes ago (Aug. 28, 2025, 7:14 p.m.)
Issued	24 years, 9 months ago (Nov. 28, 2000)
Published	24 years, 9 months ago (Nov. 28, 2000)
Published Online	24 years, 9 months ago (Nov. 28, 2000)
Published Print	24 years, 8 months ago (Dec. 5, 2000)

Funders 0

None

BibTeX

@article{Zha_2000, title={Elasticity of MgO and a primary pressure scale to 55 GPa}, volume={97}, ISSN={1091-6490}, url={http://dx.doi.org/10.1073/pnas.240466697}, DOI={10.1073/pnas.240466697}, number={25}, journal={Proceedings of the National Academy of Sciences}, publisher={Proceedings of the National Academy of Sciences}, author={Zha, Chang-Sheng and Mao, Ho-kwang and Hemley, Russell J.}, year={2000}, month=nov, pages={13494–13499} }

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