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

Citation
Sp. Gordienko et Ag. Druzheruchenko, Thermodynamic characteristics of self-intercalated niobium diselenide of the limiting composition, POWD MET ME, 37(7-8), 1998, pp. 397-399
Citations number
10
Categorie Soggetti
Metallurgy
Journal title
POWDER METALLURGY AND METAL CERAMICS
ISSN journal
10681302 → ACNP
Volume
37
Issue
7-8
Year of publication
1998
Pages
397 - 399
Database
ISI
SICI code
1068-1302(199807/08)37:7-8<397:TCOSND>2.0.ZU;2-F
Abstract
Vaporization of niobium diselenide has been investigated by mass spectromet ry, mass-loss effusion, chemical analysis, and x-ray analysis. We have esta blished that the equilibrium vapor above niobium diselenide consists of mai nly Se-2 molecules at 1400-1600 K; as selenium is removed from the sample, self-intercalation of diselenide occurs up to Nb-1.28,Se-2. We have determi ned the standard enthalpies of dissociation and formation of self-intercala ted diselenide of limiting composition as 405.3 kJ/mole and -260.4 kJ/mole, respectively.