TY  - JOUR
AU  - Winkler, Björn
AU  - Friedrich, Alexandra
AU  - Morgenroth, Wolfgang
AU  - Haussühl, Eiken
AU  - Milman, Victor
AU  - Stanek, Chris R.
AU  - McClellan, Kenneth J.
TI  - 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
JO  - Chinese science bulletin
VL  - 59
IS  - 36
SN  - 1861-9541
CY  - Beijing, China
PB  - Chinese Acad. of Sciences
M1  - PUBDB-2015-01345
SP  - 5278 - 5282
PY  - 2014
N1  - OA
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000345381500018
DO  - DOI:10.1007/s11434-014-0635-5
UR  - https://bib-pubdb1.desy.de/record/207435
ER  -