THE VAPORIZATION BEHAVIOR AND THERMODYNAMIC STABILITY OF V12P7(S) ANDV4P3(S)

Authors
MYERS CE SHAH AH KEMATICK RJ
Citation
Ce. Myers et al., THE VAPORIZATION BEHAVIOR AND THERMODYNAMIC STABILITY OF V12P7(S) ANDV4P3(S), Journal of alloys and compounds, 217(2), 1995, pp. 240-244
Citations number
11
Categorie Soggetti
Chemistry Physical","Metallurgy & Metallurigical Engineering","Material Science
Journal title
Journal of alloys and compounds → ACNP
ISSN journal
09258388
Volume
217
Issue
2
Year of publication
1995
Pages
240 - 244
Database
ISI
SICI code
0925-8388(1995)217:2<240:TVBATS>2.0.ZU;2-K
Abstract
The vaporization behavior and thermodynamic stability of V12P7 and V4P 3 have been investigated in the temperature ranges 1563-1762 K and 145 0-1650 K respectively using a mass loss Knudsen effusion technique. X- ray powder diffraction investigation showed that both compounds vapori ze incongruently in this temperature range with phosphorus being lost preferentially. The enthalpies of formation (from metal and white phos phorus) were determined: Delta(f)H(298.15)degrees(V12P7) = -1390 +/- 5 kJ mol(-1) (-73 kJ (g-atom)(-1)) Delta(f)H(298.15)degrees(V4P3) = -53 4 +/- 6 kT mol(-1) (-76 kJ (g-atom)(-1))