Phase transition and compression behavior of gibbsite under high-pressure Article

Liu, H, Hu, J, Xu, J et al. (2004). Phase transition and compression behavior of gibbsite under high-pressure . PHYSICS AND CHEMISTRY OF MINERALS, 31(4), 240-246. 10.1007/s00269-004-0390-2

cited authors

  • Liu, H; Hu, J; Xu, J; Liu, Z; Shu, J; Mao, HK; Chen, J

authors

abstract

  • In situ high-pressure synchrotron X-ray diffraction and infrared absorption experiments for gibbsite were performed at room temperature up to 53 and 25 GPa, respectively. A phase transition was confirmed at about 2.5 GPa. The high-pressure phase is indexed as an orthorhombic structure, rather than a triclinic structure as reported in previous studies. The compressibility of gibbsite and its high-pressure polymorph were studied, and their bulk moduli K0 were determined to be 49 and 75 GPa, respectively with K0′ as 4. The in situ high-pressure infrared absorption spectra revealed the gradual disordering of hydrogen substructure above 15 GPa in quasihydrostatic compression. © Springer-Verlag 2004.

publication date

  • May 1, 2004

published in

Digital Object Identifier (DOI)

start page

  • 240

end page

  • 246

volume

  • 31

issue

  • 4