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Fig. 1 | Earth, Planets and Space

Fig. 1

From: Reductive chemical demagnetization: a new approach to magnetic cleaning and a case study of reef limestones

Fig. 1

pH versus pE equilibrium diagram of the Fe–S–H2O system, modified from Garrels and Christ (1965) and Henshaw and Merrill (1980). The pH and pE of the reductive etchant should be adjusted to plot in the Fe2+ area. Circle symbols indicate the etchant comprising the ascorbic acid solution buffered with sodium bicarbonate. Triangle symbol indicate the KI solution

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