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Structural phase transition of GdGa 2 at high pressure

✍ Scribed by Schwarz, U.; Bräuninger, S.; Burkhardt, U.; Syassen, K.; Hanfland, M.

Book ID
120631387
Publisher
Oldenbourg Wissenschaftsverlag
Year
2001
Tongue
English
Weight
306 KB
Volume
216
Category
Article
ISSN
2194-4946

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✦ Synopsis

Abstract

Structural properties of the intermetallic compound GdGa~2~ were investigated under hydrostatic pressures up to 20 GPa using angle dispersive x-ray powder diffraction in combination with the diamond anvil cell technique. At 7.7(5) GPa the onset of a first order phase transition from the AlB~2~ type structure into a hexagonal high-pressure phase is observed. The transformation is associated with a 2.5 % elongation of the lattice parameter a and an 8 % shortening of c. TB-LMTO bandstructure calculations reveal that the two-dimensional character of the gallium partial structure is preserved in the high-pressure modification.

📜 SIMILAR VOLUMES

Structural phase transition of CeAuGe at
Structural phase transition of CeAuGe at high pressure
✍ Brouskov, Valeri; Hanfland, Michael; Pöttgen, Rainer; Schwarz, Ulrich 📂 Article 📅 2005 🏛 Oldenbourg Wissenschaftsverlag 🌐 English ⚖ 159 KB

## Abstract Structural properties of the ternary intermetallic compound CeAuGe were investigated at hydrostatic pressures up to 15 GPa with high-resolution angle dispersive X-ray powder diffraction using synchrotron radiation and the diamond anvil cell technique. At 8.7(7) GPa a first order phase t