Structural transition in compressed amorphous sulfur | INSTITUT DE PHYSIQUE DU GLOBE DE PARIS

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  Structural transition in compressed amorphous sulfur

Type de publication:

Journal Article

Source:

Physical Review Letters, Volume 100, Ticket 7 (2008)

ISBN:

0031-9007

Numéro d'accès:

WOS:000253336900044

Mots-clés:

Physico-chimie des fluides géologiques, UMR 7154

Résumé:

Properties of amorphous sulfur (a-S) were investigated by synchrotron x-ray diffraction up to 100 GPa between 40 and 175 K. Measurements of the structure factor yielded the radial distribution function and the densities of two amorphous forms. a-S undergoes a structural transition above 65 GPa, accompanied by density discontinuity of 7%. These results indicate the amorphous-amorphous transition, from a low-density to a high-density form, and open up the possibility for the direct measurements of density of liquid-amorphous materials at extreme conditions.