Estimation of the Standard Free Energy of Formation of Bastnasite, REFCO3

Isehaq Al-Nafai, Hojong Kim, Kwadwo Osseo-Asare

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


The standard Gibbs free energy of formation (ΔGo f, 298) of bastnasite, (Ce, La, Nd, Pr)FCO3, was estimated using four different methods. The obtained average values were − 1589.5 kJ/mol for CeFCO3, − 1599.5 kJ/mol for LaFCO3, − 1589.1 kJ/mol for NdFCO3, and − 1595.4 kJ/mol for PrFCO3. The value for cerium bastnasite, CeFCO3, was used to construct a potential vs. pH (Eh-pH) diagram to investigate the stability relations of cerium bastnasite. The diagram shows that CeFCO3 is stable in neutral to basic conditions (pH ~ 6.5–11).

Original languageEnglish (US)
Pages (from-to)227-233
Number of pages7
JournalMining, Metallurgy and Exploration
Issue number1
StatePublished - Feb 1 2019

All Science Journal Classification (ASJC) codes

  • Control and Systems Engineering
  • General Chemistry
  • Geotechnical Engineering and Engineering Geology
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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