Extended Data Fig. 5: A synthetic mixture of ferricopiapite and rhomboclase showed partial dissolution and dehydration during the sample preparation and subsequent experiments.
From: Preferential Formation of Chlorate over Perchlorate on Mars Controlled by Iron Mineralogy
(a) Synthetic ferricopiapite and rhomboclase; (b) ferricopiapite and rhomboclase mixture was mixed and shaken with NaCl salt for 12 h, and resulted in the partial dissolution of the mixture. (c), (d) after UV and O3 experiments, the mineral mixture became dry again. The presence of partial solution in the initial salt mixture before the experiments may account for the increase of ClO3− yields both in the UV and O3 experiments. The water originated from the sulfate mixture, as the ferricopiapite and rhomboclase contain nominally 30.72% and 25.25% of crystalline water, respectively.
