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

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

doi:10.1007/s42461-018-0041-7

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

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

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Abstract

The standard Gibbs free energy of formation (ΔG^o _{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 language	English (US)
Pages (from-to)	227-233
Number of pages	7
Journal	Mining, Metallurgy and Exploration
Volume	36
Issue number	1
DOIs	https://doi.org/10.1007/s42461-018-0041-7
State	Published - 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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10.1007/s42461-018-0041-7

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title = "Estimation of the Standard Free Energy of Formation of Bastnasite, REFCO3 ",

abstract = "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).",

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AB - 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).

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

Abstract

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