Detail of "15699-18-0"

Reference

A curious crystallization phenomenon related to atmospheric pollution

A curious crystallization phenomenon related to atmospheric pollution. Pedinelli, Mario (Trento, Italy). Atti Accad. Roveretana Agiati, Volume Date 1974-1975, 14-15, 191-6 (Italian) 1976. CODEN: AACAAC. DOCUMENT TYPE: Journal CA Section: 59 (Air Pollution and Industrial Hygiene) Section cross-reference(s): 75 Dendroidal formation of (NH4)2Ni(SO4)2 [15699-18-0] on the lower surface of Ni-plated parts of many cars is the result of corrosion by H2SO4 formed by oxidn. of atm. SO2, followed by reaction with NH3 of industrial origin.

The IR reflectance spectra of the n3(SO42-) and n4(SO42-) band regions of some Tutton salts using polarized radiation: testing the model dielectric function

The IR reflectance spectra of the n3(SO42-) and n4(SO42-) band regions of some Tutton salts using polarized radiation: testing the model dielectric function. Ivanovski, Vladimir; Petrusevski, Vladimir M.; Gunde, Marta K. (Institute of Chemistry, Faculty of Science, Sts. Cyril and Methodius University, Skopje 1000, Macedonia). 15699-18-0 and 13814-87-4 are cas registry numbers. These chemicals are also mentioned in this article. Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy, Volume Date 2005, 61A(1-2), 67-76 (English) 2004 Elsevier B.V. CODEN: SAMCAS. ISSN: 1386-1425. DOCUMENT TYPE: Journal CA Section: 73 (Optical, Electron, and Mass Spectroscopy and Other Related Properties) The study of the vibrational bands of the SO42- ions (in the n3 and n4 frequency regions) of six different Tutton salts was performed with specular IR reflectance spectroscopy using polarized radiation, on single crystal samples. The reflectance function under oblique incidence using dielec. model function as parameter (originally derived for optically uniaxial crystals) appeared to be readily applicable for the studied monoclinic crystals. The frequencies of the transversal and longitudinal phonons were obtained by fitting of spectra recorded from (0 1 0), (0 0 1) and (1 0 0) crystal planes. Further, the symmetry types of all exptl. detected phonons were identified. Some of the results were further confirmed from IR absorption spectra recorded at liq. N temp. (LNT) of isomorphously isolated SO42- ions into the corresponding selenate matrixes. .