Dicaesium tetramagnesium pentakis(carbonate) decahydrate, Cs2Mg4(CO3)5·10H2O

Abstract

The title carbonate hydrate, Cs2Mg4(CO3)5·10H2O, was crystallized at room temperature out of aqueous solutions containing caesium bicarbonate and magnesium nitrate. Its monoclinic crystal structure (P21/n) consists of double chains of composition 1∞[Mg(H2O)2/1(CO3)3/3], isolated [Mg(H2O)(CO3)2]2– units, two crystallographically distinct Cs+ ions and a free water molecule. The crystal under investigation was twinned by reticular pseudomerohedry.

Keywords

• carbonate
• hydrate
• magnesium compound
• caesium compound
• twinning
• crystal structure