RT info:eu-repo/semantics/article
T1 Structural investigation of the negative thermal expansion in yttrium and rare earth molybdates
A1 Lozano Gorrín, Antonio Diego
A1 Guzmán Afonso, Candelaria
A1 González Silgo, María Cristina
A1 González Platas, Javier
A1 Torres Betancort, Manuel Eulalio
A1 Prado Sabalisck, Nanci
A1 V.M. Sánchez-Fajardo
A1 Campo, Javier
A1 Rodr´ıguez Carvajal, Juan
A2 Química
K1 negative thermal expansion
K1 yttrium
K1 rare earth molybdates
AB The Sc2(WO4)3-type phase (Pbcn) of Y2(MoO4)3, Er2(MoO4)3 and Lu2(MoO4)3 has been prepared by the conventional solid-state synthesis with preheated oxides and the negative thermal expansion (NTE) has been investigated along with an exhaustive structural study, after water loss. Their crystal structures have been refined using the neutron and x-ray powder diffraction data of dehydrated samples from 150 to 400 K. The multi-pattern Rietveld method, using atomic displacements with respect to a known structure as parameters to refine, has beenapplied to facilitate the interpretation of the NTE behavior. Polyhedral distortions, transverse vibrations of A ··· O–Mo (A = Y and rare earths) binding oxygen atoms, non-bonded distances A ··· Mo and atomic displacements from the high temperature structure, have been evaluated as a function of the temperature and the ionic radii.
SN 0953-8984
YR 2011
FD 2011
LK http://riull.ull.es/xmlui/handle/915/40813
UL http://riull.ull.es/xmlui/handle/915/40813
LA en
DS Repositorio institucional de la Universidad de La Laguna
RD 25-abr-2025