Vaporization Products of Transition-Metal and Rare-Earth Complex Fluorides Studied by High-Temperature Mass Spectrometry

Autor:	M. S. Leskiv, Norbert S. Chilingarov, Alexey V. Kepman, V. F. Sukhoverkhov, L. I. Oleinik, Zoran Mazej, D. Rau, Lev N. Sidorov, S.V. Abramov
Rok vydání:	2005
Předmět:	General Chemical Engineering Potassium Thermal decomposition Metals and Alloys Analytical chemistry chemistry.chemical_element Decomposition Inorganic Chemistry chemistry.chemical_compound chemistry Transition metal Vaporization Materials Chemistry Hexafluoroplatinate Fluorine Fluoride
Zdroj:	Inorganic Materials. 41:1327-1333
ISSN:	1608-3172 0020-1685
Popis:	Gaseous products of the thermal decomposition of Ni(IV), Tb(IV), Mn(IV), and Pt(IV) complex fluorides were studied by high-temperature mass spectrometry. The results demonstrate that the decomposition of potassium hexafluoronickelate and potassium heptafluorotherbate is accompanied by atomic fluorine release and that K 2 NiF 6 decomposes in two steps, at 570-670 and 700-850 K. p (F) and p (F 2 ) measurements indicate that the reaction 2F = F 2 does not reach equilibrium. Data on K 3 TbF 7 vaporization suggest that the vapor phase contains complex Tb(IV) molecules. Comparison of the decomposition temperatures of TbF 4 and K 3 TbF 7 indi- cates that the complex fluoride is more stable. The thermolysis of cesium hexafluoromanganate and potassium hexafluoroplatinate is accompanied by no fluorine release. Experimental data attest to the presence of Cs 2 MnF 6 in the vapor phase. In addition, Cs 2 MnF 6 decomposes to form Mn(III) complexes. K 2 PtF 6 sublimes with decomposition to form KF and Pt metal.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5d02d3b9eb7a00c62d2531f7d9a2f502 https://doi.org/10.1007/s10789-005-0310-y Zobrazit plný text záznamu Plný text ve formátu PDF