Optical Absorption Measurements of Ytterbium(III) Ions in Aqueous and in Ethanol Solutions. (Physics Section).* Bogart,T. and R.A. Mayanovic. Department of Physics, Astronomy and Materials Science materials science Study of the properties of solid materials and how those properties are determined by the material's composition and structure, both macroscopic and microscopic. , Southwest Missouri State University Missouri State University is a state university located in Springfield, Missouri. It is the state's second largest university in student enrollment, second only to the University of Missouri. From 1972 to 2005, Missouri State was known as Southwest Missouri State University. . OPTICAL ABSORPTION MEASUREMENTS OF YTTERBIUM ytterbium (ĭtûr`bēəm) [for Ytterby, a town in Sweden], metallic chemical element; symbol Yb; at. no. 70; at. wt. 173.04; m.p. 819°C;; b.p. about 1,194°C;; sp. gr. about 7.0; valence +2 or +3. (III) IONS IN AQUEOUS AND IN ETHANOL SOLUTIONS. The 4f electrons of the lanthanide series lanthanide series, a series of metallic elements, included in the rare-earth metals, in Group 3 of the periodic table. Members of the series are often called lanthanides, although lanthanum (atomic number 57) is not always considered a member of the series. of the elements (La - Lu), being well shielded by intervening electron shells, are largely unreactive with neighboring ligands. As a result, the lanthanide lanthanide Any of the series of 15 consecutive chemical elements in the periodic table from lanthanum to lutetium (atomic numbers 57–71). With scandium and yttrium, they make up the rare earth metals. ions interact with ligands in the formation of complexes mainly through relatively weak electrostatic forces. This leads to rather weak absorption band features in optical spectra of lanthanide ions in solutions, making such measurements rather difficult. The optical transmission spectra of [YbCl.sub.3] in ethanol solutions show band features associated with [Yb.sup.3+] complexes having CE ligands in the near-UV region ([sim]370 nm) that do not appear in the spectra of [YbCl.sub.3] in water. In addition, absorption features in the near infra-red region ([sim]1000 nm) occurring due to excitation of the electrons within the 4f shell show fine modulations due to chloro ytterbium(III) complex formation in the ethanol solutions. The development of a high-temperature optical cell suitable for studies of lanthanide and other metal-based solutions under elevated temperature and pressure conditions will also be discussed. |
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