Mechanism of thermal decomposition of yttrium nitrate hexahydrate, Y[.sub.3] x 6[H.sub.2]O and modeling of intermediate oxynitrates

The thermal decomposition of yttrium nitrate hexahydrate Y[(N[O.sub.3]).sub.3] x 6[H.sub.2]O is a complex condensation process generating a tetramer arrangement [Y.sub.4][O.sub.4][(N[O.sub.3]).sub.4] formed by alternating yttrium and oxygen atoms. The anions N[O.sub.3.sup.-] attach themselves to the...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2013-01, Vol.111 (1), p.115
Main Authors: Melnikov, P, Nascimento, V.A, Consolo, L.Z.Z, Silva, A.F
Format: Article
Language:English
Subjects:
Nitrates
Rare earth metals
Online Access:Get full text
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Summary:The thermal decomposition of yttrium nitrate hexahydrate Y[(N[O.sub.3]).sub.3] x 6[H.sub.2]O is a complex condensation process generating a tetramer arrangement [Y.sub.4][O.sub.4][(N[O.sub.3]).sub.4] formed by alternating yttrium and oxygen atoms. The anions N[O.sub.3.sup.-] attach themselves to the yttrium atoms. The tetramer gradually loses [N.sub.2][O.sub.5] and, through the formation of [Y.sub.4][O.sub.5][(N[O.sub.3]).sub.2], is transformed into yttrium oxide. The bond lengths and bond angles of intermediate oxynitrates calculated using the molecular mechanics method rendered data compatible with the results of X-ray diffraction for related compounds.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-012-2236-3