Determination of the standard gibbs energies of formation of Ba3P2 and Ba3(PO4)2

D. J. Min, N. Sano

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


The standard Gibbs energies of formation of barium phosphide and barium orthophosphate were determined by a chemical equilibration technique yielding the following results: 3Ba(1)+P2(g)=Ba3P2 (s) ΔG°=-732,000+156.1T(±12,800) (J/mol) 3BaO (s)+P2(g)+5/2O2(g)=Ba3(PO4)2(s) ΔG°=-2,523,000+580.0 T(±16,600) (J/mol) The stability and the thermodynamic behavior of barium compounds as reaction products of dephosphorization of steel were discussed in terms of the oxygen partial pressure and the activity coefficient of Ba1.5P in molten Ba saturated with CaO.

Original languageEnglish
Pages (from-to)871-877
Number of pages7
JournalMetallurgical Transactions B
Issue number6
Publication statusPublished - 1989 Dec

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry
  • General Materials Science


Dive into the research topics of 'Determination of the standard gibbs energies of formation of Ba3P2 and Ba3(PO4)2'. Together they form a unique fingerprint.

Cite this