Thermodynamic characteristics of self-intercalated niobium diselenide of the limiting composition

descriptionPublicationkeyboard_double_arrow_right Article 01 Jul 1998 English Publisher:Springer Science and Business Media LLCJournal:Powder Metallurgy and Metal Ceramics, volume 37, pages 397-399 (issn: 1068-1302, eissn: 1573-9066,

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Authors: S. P. Gordienko; A. G. Druzheruchenko;

doi: 10.1007/bf02676024

Thermodynamic characteristics of self-intercalated niobium diselenide of the limiting composition

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Abstract

Vaporization of niobium diselenide has been investigated by mass spectrometry, mass-loss effusion, chemical analysis, and x-ray analysis. We have established that the equilibrium vapor above niobium diselenide consists of mainly Se.2 molecules at 1400–1600 K; as selenium is removed from the sample, self-intercalation of diselenide occurs up to Nb1.28Se2. We have determined the standard enthalpies of dissociation and formation of self-intercalated diselenide of limiting composition as 405.3 kJ/mole and −260.4 kJ/mole, respectively.

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