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000207435 1001_ $$0P:(DE-H253)PIP1011391$$aWinkler, Björn$$b0$$eCorresponding Author
000207435 245__ $$aCompression Behavior of $Sm_{2}Ti_{2}O_{7}$-Pyrochlore up to 50 GPa: Single-Crystal X-ray Diffraction and Density Functional Theory Calculations
000207435 260__ $$aBeijing, China$$bChinese Acad. of Sciences$$c2014
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000207435 520__ $$aSingle-crystal X-ray diffraction at pressures up to 50 GPa has been employed to study the compression behavior of Sm2Ti2O7-pyrochlore. In contrast to earlier reports, we observed no pressure-induced amorphization or pressure-induced anion disorder up to 50 GPa. The experimental study has been complemented by density functional theory-based calculations. A combination of the theoretical and experimental data yields a bulk modulus of about 185 GPa, significantly higher than a value which had been reported earlier. In comparison to earlier work, the  current study provides more reliable data due to the use of neon as a pressure medium, which provides a morehydrostatic pressure than the aluminum, which had been employed as a pressure medium in the earlier studies. An analysis of the compressibility of Al2B2O7 pyrochlores shows an approximately linear dependence of the bulk modulus on the unit cell volume.
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000207435 7001_ $$0P:(DE-H253)PIP1007910$$aFriedrich, Alexandra$$b1
000207435 7001_ $$0P:(DE-H253)PIP1006769$$aMorgenroth, Wolfgang$$b2$$udesy
000207435 7001_ $$0P:(DE-HGF)0$$aHaussühl, Eiken$$b3
000207435 7001_ $$0P:(DE-HGF)0$$aMilman, Victor$$b4
000207435 7001_ $$0P:(DE-HGF)0$$aStanek, Chris R.$$b5
000207435 7001_ $$0P:(DE-HGF)0$$aMcClellan, Kenneth J.$$b6
000207435 773__ $$0PERI:(DE-600)2069521-4$$a10.1007/s11434-014-0635-5$$gVol. 59, no. 36, p. 5278 - 5282$$n36$$p5278 - 5282$$tChinese science bulletin$$v59$$x1861-9541$$y2014
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