Table 2.

Comparison of thermodynamics of formation of coffinite at 25 °C obtained in different studies

Source	ΔHf,ox, kJ/mol*	ΔGf,ox, kJ/mol*	ΔSf,ox, J mol−1⋅K−1†	ΔH°f, kJ/mol	ΔG°f, kJ/mol
Langmuir (22)	−5.7‡	5.6	−37.9	−2,001.3	−1,882.4
Grenthe et al. (37)	4.3 ± 5.6‡	4.4 ± 4.2	−0.4 ± 12.8	−1,991.3 ± 5.4	−1,883.6 ± 4.0
Hemingway (36)		2 ± 6			−1,886 ± 6
Szenknect (40)	−105 ± 32‡	16 ± 6	−407 ± 56	−2,101 ± 32	−1,872 ± 6
	10 ± 32‡,§		−19.1 ± 12.8§
Fleche (39)	82			−1,913
Coffinite-F	24.6 ± 3.1			−1,971.0 ± 3.4‡
	26.7 ± 4.7			−1,968.9 ± 4.9‡
Coffinite-G	(-5.5 ± 3.5)			−2,001.1 ± 3.8‡
	24.1 ± 3.5			−1,971.5 ± 3.8‡
	23.9 ± 4.0			−1,971.7 ± 4.2‡

^*Calculated with auxiliary data from ref. 48.

^†This value was calculated.

^‡Calculated with auxiliary data from ref. 48.

^§The entropy value was taken from averaging reference data (22, 37), and then was used to calculate the enthalpy of formation.