%0 Journal Article
%A Winkler, Björn
%A Friedrich, Alexandra
%A Morgenroth, Wolfgang
%A Haussühl, Eiken
%A Milman, Victor
%A Stanek, Chris R.
%A McClellan, Kenneth J.
%T Compression Behavior of Sm<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>-Pyrochlore up to 50 GPa: Single-Crystal X-ray Diffraction and Density Functional Theory Calculations
%J Chinese science bulletin
%V 59
%N 36
%@ 1861-9541
%C Beijing, China
%I Chinese Acad. of Sciences
%M PUBDB-2015-01345
%P 5278 - 5282
%D 2014
%Z OA
%X Single-crystal X-ray diffraction at pressures up to 50 GPa has been employed to study the compression behavior of Sm2Ti2O7-pyrochlore. In contrast to earlier reports, we observed no pressure-induced amorphization or pressure-induced anion disorder up to 50 GPa. The experimental study has been complemented by density functional theory-based calculations. A combination of the theoretical and experimental data yields a bulk modulus of about 185 GPa, significantly higher than a value which had been reported earlier. In comparison to earlier work, the  current study provides more reliable data due to the use of neon as a pressure medium, which provides a morehydrostatic pressure than the aluminum, which had been employed as a pressure medium in the earlier studies. An analysis of the compressibility of Al2B2O7 pyrochlores shows an approximately linear dependence of the bulk modulus on the unit cell volume.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000345381500018
%R 10.1007/s11434-014-0635-5
%U https://bib-pubdb1.desy.de/record/207435