Figure 6.

Change in stability boundaries in Fe–O–H system with age of the amorphous iron oxyhydroxides at 25°C, 240 bar and [Fetotal] = 3.9 × 10-5 m calculated and based on the physical and geochemical conditions of the Franklin Seamount vent fluid reported in ref. 5. (1) Freshly precipitated Fe(OH)3, ref. 36. (2) 4-day old Fe(OH)3, ref. 39 and 40. (3) Aged Fe(OH)3, ref. 39. (4) Age of Fe(OH)3 unknown, ref. 25. Thermodynamic data for Fe3(OH)8 is for freshly precipitated material.[39] Calculated with aid from SUPCRT92 program.[19]

Boyd and Scott Geochemical Transactions 2001 2:45   doi:10.1186/1467-4866-2-45