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Vibrational spectra of the layered monofluorophosphate (V), NH4Ag3(PO3F)2
(John Wiley & Sons Ltd, 2009-11)
The powder Fourier-transform (FT) infrared (IR) and Raman spectra of the recently characterized NH4Ag3(PO3F)2 were recorded and are discussed with a site-symmetry analysis based on its known structural data. Some comparisons ...
Structural and magnetic influence of yttrium-for-iron substitution in cobalt ferrite
(Elsevier Science Sa, 2017-01-15)
Yttrium-substituted cobalt ferrites of nominal composition CoYxFe1.98-xO4, x = 0; 0.1; 0.2; 0.3, were prepared using the sol-gel combustion method. A slight iron deficiency in the formulation was designed in order to improve ...
Luminescent properties of yttrium diphenylphosphinate activated by europium
(Elsevier B.V., 2006-07-20)
The synthesis and spectroscopic characterization of yttrium diphenylphosphinates doped with europium are reported. The purity of all samples was confirmed by carbon and hydrogen micro analysis, thermal analysis, IR vibrational ...
Luminescent properties of yttrium diphenylphosphinate activated by europium
(Elsevier B.V., 2006-07-20)
The synthesis and spectroscopic characterization of yttrium diphenylphosphinates doped with europium are reported. The purity of all samples was confirmed by carbon and hydrogen micro analysis, thermal analysis, IR vibrational ...
Coexisting on-center and off-center Yb3+ sites in Ce1-xYbxFe4P12 skutterudites
(Amer Physical SocCollege PkEUA, 2009)
Influence of a co-substituted A-site on structural characteristics and ferroelectricity of (Pb, Ba, Ca)TiO3 complex perovskites: analysis of local-, medium- and long-range order
(Springer, 2014-03-01)
Thin films of A-site co-substituted, PbTiO3 (PTO) by Ba2+ and Ca2+, i.e., PBCT70, PBCT60, PBCT50 and PBCT40 were fabricated on Pt/Ti/SiO2/Si substrates by chemical solution deposition. Structures of the samples were ...
Espodumênio brasileiro natural e tratado: um estudo dos centros de cor e coloração artificial
(Universidade Federal de Minas GeraisUFMG, 2002-10-30)
In this work we propose to correlate the color of spodumene gem varieties with their color causing defect centers (color centers) and to suggest treatments to enhance and modify the color of these gems. Yellow, green ...
Site index for Prosopis alba plantations in the semi-arid chaco through mixed models
(Universidade Federal de Lavras, 2019-06)
The classification of sites through curves of Site Index allows to predict the yield of the planted forests at a certain age of the stand and to plan cultural treatments. The goal of this research was to compare ...