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Structural phase transition of HoGa2 at high pressure

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Schwarz, U., Bräuninger, S., Grin, Y., Syassen, K., & Hanfland, M. (1998). Structural phase transition of HoGa2 at high pressure. Journal of Alloys and Compounds, 268(1-2), 161-165. doi:10.1016/S0925-8388(97)00594-X.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0019-91DA-E
Abstract
We have investigated structural properties of HoGa2 under hydrostatic pressures up to 45 GPa using angle dispersive X-ray powder diffraction in combination with the diamond anvil cell technique. At 4(1) GPa we observed the onset of a first-order structural phase transition of the AlB2-type low-pressure phase which was associated with a 10% shortening of the c-axis and a 2.5% elongation of the a-axis. Both low-pressure and high-pressure modifications are characterized by 6(3) nets of gallium atoms. (C) 1998 Elsevier Science S.A.