Detail of "15474-63-2"

Reference

High-temperature mass-spectrometric investigation of the evaporation properties of dysprosium triiodide

High-temperature mass-spectrometric investigation of the evaporation properties of dysprosium triiodide. Kaposi, O.; Lelik, L.; Balthazar, K. (Dep. Phys. Chem. Radiol., Lorand Eotvos Univ., Budapest H-1088, Hung.). High Temp. Sci., 16(5), 299-310 (English) 1983. CODEN: HITSAC. ISSN: 0018-1536. DOCUMENT TYPE: Journal CA Section: 69 (Thermodynamics, Thermochemistry, and Thermal Properties) Section cross-reference(s): 65, 73 The Knudsen-cell mass spectrometric technique was used to study the equil. vapor compn. and its temp. dependence over DyI3(s) [15474-63-2]. The fragmentation pattern, the appearance potentials, and the thermochem. data for pos. ions were detd. A significant Dy2I6(g) concn. was found in the vapor in the Knudsen cell temp. range. Ion current vs. temp. data yield heats of sublimation of monomer and dimer as well as thermochem. values for dimerization. The 2nd law heat of sublimation for DyI3 is 292 ± 12 and for Dy2I6 is 365 ± 16 kJ/mol. The heats of atomization for are 972 ± 30 and 2020 ± 40 kJ/mol, resp. The heat of dimerization and the heat of formation of Dy2I6 are -225 ± 12 and -826 kJ/mol, resp. The measured ion currents were correlated with the corresponding partial pressures. By expressing the partial pressures in terms of reaction equil. const., Kp, it is possible to det. dimerization reaction thermodn. data by the 3rd law method.

Vapor-phase complex formation over the dysprosium triiodide/sodium iodide and dysprosium triiodide/cesium iodide systems

Vapor-phase complex formation over the dysprosium triiodide/sodium iodide and dysprosium triiodide/cesium iodide systems. Kaposi, O.; Lelik, L.; Balthazar, K. (Dep. Phys. Chem. Radiol., Lorand Eotvos Univ., Budapest H-1088, Hung.). High Temp. Sci., 16(5), 311-23 (English) 1983. CODEN: HITSAC. ISSN: 0018-1536. DOCUMENT TYPE: Journal CA Section: 69 (Thermodynamics, Thermochemistry, and Thermal Properties) Section cross-reference(s): 73 A Knudsen cell-mass spectrometric technique was used to det. the fragmentation patterns and appearance potentials for vapor species over mixts. of DyI3 [15474-63-2] with NaI and CsI. Direct evidence for high temp. vapor phase complex formation in these systems was obtained. From the temp.-dependences of the measured ion intensities, various important thermochem. 7681-82-5 and 15474-63-2 which are cas registry numbers of chemicals are mentioned. data for heterocomplexes were detd. The heats of sublimation at 1000 K are (NaDyI4) 218 ± 12 and (CsDyI4) 180 kj/mol, resp. The heats of formation of the complexes are (NaDyI4)(g) -620 and (CsDyI4)(g) -688 and the atomization energies are 1446 and 1484 kJ/mol, resp. The satd. vapor pressures as functions of temp. were deduced from ion current measurements. By assuming equil. and that the fugacities of the vapor species are equal to their partial pressures, the free energies and entropies of formation of the heterocomplexes were derived. .