L G van Uitert
Articles written in Pramana – Journal of Physics
Volume 30 Issue 3 March 1988 pp 225-231 Condensed Matter Physics
A Jayaraman G A Kourouklis L G van Uitert
The pressure dependence of the first-order Raman peak and two second-order Raman features of ThO2 crystallizing in the fluorite-type structure is investigated using a diamond anvil cell, up to 40GPa. A phase transition from the fluorite phase is observed near 30 GPa as evidenced by the appearance of seven new Raman peaks. The high pressure phases of ThO2 and CeO2 exhibit similar Raman features and from this it is believed that the two structures are the same, and have the PbCl2-type structure. The pressure dependence d
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