Figure 4From: An improved pyrite pretreatment protocol for kinetic and isotopic studiesSurface properties observed by SEM. Surface of untreated pyrite (A), pyrite after 15 minutes in boiling HCl (B), pyrite after pretreatment by Method 1 (C), and pyrite after the 3rd(D), 6th(E) and 12th(F) ultrasonication cycle in Method 2 (see text for details).Back to article page