High-pressure study of the behavior of mineral barite by x-ray diffraction
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Altres documents de l'autoria: Santamaría Pérez, D.; Gracia, Lourdes; Garbarino, G.; Beltran, Armando; Chulia-Jordan, Raquel; Gomis Hilario, Óscar; Errandonea, Daniel; Ferrer Roca, Chantal María; Martínez García, Domingo; Segura García del Río, Alfredo
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Mostra el registre complet de l'elementcomunitat-uji-handle:10234/9
comunitat-uji-handle2:10234/7013
comunitat-uji-handle3:10234/8638
comunitat-uji-handle4:
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High-pressure study of the behavior of mineral barite by x-ray diffractionAutoria
Data de publicació
2011-08-02Editor
American Physical SocietyISSN
1098-0121; 1550-235XCita bibliogràfica
Physical Review B (2011) vol. 84, no. 5Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
http://link.aps.org/doi/10.1103/PhysRevB.84.054102Versió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
In this paper, we report the angle-dispersive x-ray diffraction data of barite, BaSO4 , measured in a diamond-anvil cell up to a pressure of 48 GPa, using three different fluid pressure-transmitting media (methanol- ... [+]
In this paper, we report the angle-dispersive x-ray diffraction data of barite, BaSO4 , measured in a diamond-anvil cell up to a pressure of 48 GPa, using three different fluid pressure-transmitting media (methanol-ethanol mixture, silicone oil, and He). Our results show that BaSO4 exhibits a phase transition at pressures that range from 15 to 27 GPa, depending on the pressure media used. This indicates that nonhydrostatic stresses have a crucial role in the high-pressure behavior of this compound. The new high-pressure (HP) phase has been solved and refined from powder data, having an orthorhombic P212121 structure. The pressure dependence of the structural parameters of both room- and HP phases of BaSO4 is also discussed in light of our theoretical first-principles total-energy calculations. Finally, a comparison between the different equations of state obtained in our experiments is reported. [-]
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