2,533 research outputs found
Lava dome explosion-induced volcanoclastic mass flows in the Permian Collio (Italian Alps): petrographic, modal and sedimentological constraints.
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Volcanism and associated sub-lacustrine crystal-rich mass-flow deposits in the Early Permian Collio Basin (Italian Alps)
No full textDynamics of a Variscan post-orogenic basin in the Southern Alps: Sublacustrine SiO2-rich volcanism and associated mass flows (Collio Basin, Italy).
No full textHEADACHE AND ENDOCRINE DISORDERS. A CASE REPORT OF HEADACHE DUE TO WITHDRAWAL AND PRIMARY HYPERALDOSTERONISM
No full textHeadache and endocrine desorders. A case report of headache due to estrogens withdrawal and to primary hyperaldosteronism
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Size and spatial correlation of defective domains in yttrium-doped CeO2
No full textThe size of dopant-rich nanodomains was assessed in four samples of Ce1−μYμO2−μ/2 through systematic
pair distribution function (PDF) refinements. Experimental G(r) curves were fitted by different
structural models with the aim of finding a description which balanced precise structure parameterization
and reasonable number of parameters. The most reliable model was a single Y2O3-like phase,
which best accommodated to the close relationship between the fluorite (CeO2-like) and C-type
(Y2O3-like) structures. In this model, a refined cation coordinate, x(M2), measured the relative occurrence
in the G(r) of the chemical environment of Y and Ce at any value of r. The r-value at which
x(M2) vanished, i.e. at which the refined C-type cell becomes a redundant, low-symmetry description
of a fluorite cell, was assumed as the size of a C-type domain. Subtle features in G(r) could be attributed
to the fluorite or C-type phase up to ~500 Å thanks to the narrow instrumental resolution function
of the ID31 beamline (now ID22) at the ESRF, which allows us to get high resolution PDF data
Size and spatial correlation of defective domains in yttrium-doped CeO2
No full textThe size of dopant-rich nanodomains was assessed in four samples of Ce1-μYμO2-μ/2 through systematic pair distribution function (PDF) refinements. Experimental G(r) curves were fitted by different structural models with the aim of finding a description which balanced precise structure parameterization and reasonable number of parameters. The most reliable model was a single Y2O3-like phase, which best accommodated to the close relationship between the fluorite (CeO2-like) and C-type (Y2O3-like) structures. In this model, a refined cation coordinate, x(M2), measured the relative occurrence in the G(r) of the chemical environment of Y and Ce at any value of r. The r-value at which x(M2) vanished, i.e. at which the refined C-type cell becomes a redundant, low-symmetry description of a fluorite cell, was assumed as the size of a C-type domain. Subtle features in G(r) could be attributed to the fluorite or C-type phase up to ∼500 Å thanks to the narrow instrumental resolution function of the ID31 beamline (now ID22) at the ESRF, which allows us to get high resolution PDF data
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