Solid Solutions of Lindbergite-Glushinskite Series: Synthesis, Ionic Substitutions, Phase Transformation and Crystal Morphology.

ABSTRACT: To clarify the crystal chemical features of natural and synthetic oxalates Me2+(C2O4)∙2H2O (Me2+ = Fe, Mn, Mg, Zn), including minerals of the humboldtine group, solid solutions of lindbergite Mn(C2O4)∙2H2O-glushinskite Mg(C2O4)∙2H2O were precipitated under various conditions, close to those characteristic of mineralization in biofilms: at the stoichiometric ratios ((Mn + Mg)/C2O4 = 1) and non-stochiometric ratios ((Mn + Mg)/C2O4 < 1), in the presence and absence of citrate ions. Investigation of precipitates was carried out by powder X-ray diffraction, scanning electron microscopy and energy-dispersive X-ray spectroscopy. Thermodynamic modelling was performed in order to evaluate the lindbergite-glushinskite equilibrium. It was shown that glushinskite belongs to the orthorhombic β-modif

SUBMITTER: Korneev AV 

PROVIDER: S-EPMC9738142 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature