caa a22 4500 445362626 CHVBK 20180317142919.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s10832-011-9659-2 doi (NATIONALLICENCE)springer-10.1007/s10832-011-9659-2 Knight Kevin ISIS Facility, STFC Rutherford Appleton Laboratory, Harwell Oxford, OX11 0QX, Didcot, Oxon, UK aut Structural and thermoelastic study of the protonic conducting perovskite SrCe0.95Yb0.05Oξ (ξ ∼ 3) between 373 K and 1273 K [Elektronische Daten] [Kevin Knight] The temperature dependence of the crystal structure of the protonic conducting perovskite SrCe0.95Yb0.05Oξ (ξ ∼ 3) has been determined from Rietveld refinement of neutron time-of-flight powder diffraction data in 25 K steps from 373 K to 1273 K. In contrast to most SrBIVO3 perovskites which show a sequence of structural phase transitions from Pmcn - Incn - I4/mcm - $$ Pm\overline 3 m $$ with increasing temperature, SrCe0.95Yb0.05Oξ remains orthorhombic with space group Pmcn from 4.2 K to the highest temperature measured. Crystallographic results are presented graphically in the form of the magnitude of the seven unique symmetry adapted basis vectors of a hypothetical aristotype perovskite phase. Thermoelastic properties of SrCe0.95Yb0.05Oξ deduced from the temperature variation of the unit cell volume and Debye-Waller factors are compared with literature values derived from independent calorimetric, Raman and elastic measurements. Thermodynamically, SrCe0.95Yb0.05Oξ behaves as a Debye-like solid with an average Grüneisen parameter in the range 1.4-1.5, but with two characteristic temperatures, ∼200 K and ∼600 K, the lower temperature being more related to the cation vibrations, the higher to the anion vibrations. Springer Science+Business Media, LLC, 2011 SrCexYb1-xOξ nationallicence Crystal structure nationallicence Symmetry-adapted basis-vector decomposition nationallicence Thermoelastic properties nationallicence Journal of Electroceramics Springer US; http://www.springer-ny.com 27/3-4(2011-12-01), 143-153 1385-3449 27:3-4<143 2011 27 10832 https://doi.org/10.1007/s10832-011-9659-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10832-011-9659-2 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Knight Kevin ISIS Facility, STFC Rutherford Appleton Laboratory, Harwell Oxford, OX11 0QX, Didcot, Oxon, UK aut NATIONALLICENCE 773 0- Journal of Electroceramics Springer US; http://www.springer-ny.com 27/3-4(2011-12-01), 143-153 1385-3449 27:3-4<143 2011 27 10832 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer