Stability and direct conversion of mineral barite crystals in carbonated hydrothermal fluids

Sulfur as Pollutant Species on the Cathode Side of a SOFC System

“…Lattice distortion, due to the incorporated sulfur, leading to a shift of XRD pattern, is possibly a reason for the impossibility to assign the peaks to any known phase. A shift of the XRD pattern in a Sr-Cr-S-O system was reported by Rendon-Angeles et al (28), where the conversion of celestite SrSO 4 crystals to SrCrO 4 was studied.…”

Mechanism and kinetics of pseudomorphic mineral replacement reactions: A case study of the replacement of pentlandite by violarite

“…(ii) Previous studies of pseudomorphic mineral replacement reactions have centered on oxides (Nahon and Merino, 1997;Pö ml et al, 2007), phosphates (Rendon-Angeles et al, 2000), halides (Putnis and Mezger, 2004), sulfates (Rendon-Angeles et al, 2006Suarez-Orduna et al, 2007;Rendon-Angeles et al, 2008), carbonates (Kasioptas et al, 2008), and aluminosilicate minerals (Putnis, 2002;, but few studies dealt with sulfide replacement reactions. Comparing results from a sulfide system with other systems should advance our knowledge of pseudomorphic mineral replacement reaction in a general sense.…”

Preparation of Selected Ceramic Compounds by Controlled Crystallization Under Hydrothermal Conditions

“…The holes form a zig-zag network inside the crystals which allows incorporating fresh solvent media at the reaction front (Suaréz-Orduña et. al., 2004a;Rendón-Angeles et. al., 2008).…”

“…It is well known that dissolution of mineral species in hydrothermal fluids normally proceeds anisotropically, producing a peculiar texture with holes inside the recrystallized mineral specie (Suaréz-Orduña et. al., 2004a;Rendón-Angeles et. al., 2008).…”