Pressure-Induced Amorphization and Negative Thermal Expansion in ZrW 2 O 8
10.1126/science.280.5365.886
Crossref journal-article
American Association for the Advancement of Science (AAAS)
Science (221)
Abstract

It has recently been shown that zirconium tungstate (ZrW 2 O 8 ) exhibits isotropic negative thermal expansion over its entire temperature range of stability. This rather unusual behavior makes this compound particularly suitable for testing model predictions of a connection between negative thermal expansion and pressure-induced amorphization. High-pressure x-ray diffraction and Raman scattering experiments showed that ZrW 2 O 8 becomes progressively amorphous from 1.5 to 3.5 gigapascals. The amorphous phase was retained after pressure release, but the original crystalline phase returned after annealing at 923 kelvin. The results indicate a general trend between negative thermal expansion and pressure-induced amorphization in highly flexible framework structures.

Bibliography

Perottoni, C. A., & Jornada, J. A. H. da. (1998). Pressure-Induced Amorphization and Negative Thermal Expansion in ZrW 2 O 8. Science, 280(5365), 886–889.

Authors 2
  1. C. A. Perottoni (first)
  2. J. A. H. da Jornada (additional)
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  20. We thank J. Haines from the Laboratoire de Physico-Chimie des Matériaux–CNRS Meudon (France) for a critical review of the paper and M. Sasso for help with the toroidal chamber. This work was supported by Conselho Nacional de Desenvolvimento Cientı́fico e Tecnológico (CNPq) Financiadora de Estudos e Projetos (FINEP) Fundação de Amparo à Pesquisa do Estado do Rio Grande do Sul (FAPERGS) and Perto S.A. (Brazil).
Dates
Type When
Created 23 years ago (July 27, 2002, 5:42 a.m.)
Deposited 1 year, 7 months ago (Jan. 12, 2024, 10:34 p.m.)
Indexed 2 weeks, 4 days ago (Aug. 2, 2025, 12:58 a.m.)
Issued 27 years, 3 months ago (May 8, 1998)
Published 27 years, 3 months ago (May 8, 1998)
Published Print 27 years, 3 months ago (May 8, 1998)
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@article{Perottoni_1998, title={Pressure-Induced Amorphization and Negative Thermal Expansion in ZrW 2 O 8}, volume={280}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.280.5365.886}, DOI={10.1126/science.280.5365.886}, number={5365}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Perottoni, C. A. and Jornada, J. A. H. da}, year={1998}, month=may, pages={886–889} }